WO2011052579A1 - 有機光電変換素子及びその製造方法 - Google Patents
有機光電変換素子及びその製造方法 Download PDFInfo
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- WO2011052579A1 WO2011052579A1 PCT/JP2010/068954 JP2010068954W WO2011052579A1 WO 2011052579 A1 WO2011052579 A1 WO 2011052579A1 JP 2010068954 W JP2010068954 W JP 2010068954W WO 2011052579 A1 WO2011052579 A1 WO 2011052579A1
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- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- AQNQQHJNRPDOQV-UHFFFAOYSA-N bromocyclohexane Chemical compound BrC1CCCCC1 AQNQQHJNRPDOQV-UHFFFAOYSA-N 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000004440 column chromatography Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229920000547 conjugated polymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- WVIIMZNLDWSIRH-UHFFFAOYSA-N cyclohexylcyclohexane Chemical group C1CCCCC1C1CCCCC1 WVIIMZNLDWSIRH-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 125000005678 ethenylene group Chemical group [H]C([*:1])=C([H])[*:2] 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 150000008376 fluorenones Chemical class 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000004770 highest occupied molecular orbital Methods 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- LHJOPRPDWDXEIY-UHFFFAOYSA-N indium lithium Chemical compound [Li].[In] LHJOPRPDWDXEIY-UHFFFAOYSA-N 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- YZASAXHKAQYPEH-UHFFFAOYSA-N indium silver Chemical compound [Ag].[In] YZASAXHKAQYPEH-UHFFFAOYSA-N 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- GCICAPWZNUIIDV-UHFFFAOYSA-N lithium magnesium Chemical compound [Li].[Mg] GCICAPWZNUIIDV-UHFFFAOYSA-N 0.000 description 1
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- SJCKRGFTWFGHGZ-UHFFFAOYSA-N magnesium silver Chemical compound [Mg].[Ag] SJCKRGFTWFGHGZ-UHFFFAOYSA-N 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- AUHZEENZYGFFBQ-UHFFFAOYSA-N mesitylene Substances CC1=CC(C)=CC(C)=C1 AUHZEENZYGFFBQ-UHFFFAOYSA-N 0.000 description 1
- 125000001827 mesitylenyl group Chemical group [H]C1=C(C(*)=C(C([H])=C1C([H])([H])[H])C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- UNFUYWDGSFDHCW-UHFFFAOYSA-N monochlorocyclohexane Chemical compound ClC1CCCCC1 UNFUYWDGSFDHCW-UHFFFAOYSA-N 0.000 description 1
- DCZNSJVFOQPSRV-UHFFFAOYSA-N n,n-diphenyl-4-[4-(n-phenylanilino)phenyl]aniline Chemical class C1=CC=CC=C1N(C=1C=CC(=CC=1)C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=CC=CC=1)C1=CC=CC=C1 DCZNSJVFOQPSRV-UHFFFAOYSA-N 0.000 description 1
- 150000002791 naphthoquinones Chemical class 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 150000004866 oxadiazoles Chemical class 0.000 description 1
- 229960003540 oxyquinoline Drugs 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000002987 phenanthrenes Chemical class 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 150000003018 phosphorus compounds Chemical class 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920003227 poly(N-vinyl carbazole) Polymers 0.000 description 1
- 229920000553 poly(phenylenevinylene) Polymers 0.000 description 1
- 229920000548 poly(silane) polymer Polymers 0.000 description 1
- 229920002098 polyfluorene Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920000128 polypyrrole Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 150000003219 pyrazolines Chemical class 0.000 description 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- ZJMWRROPUADPEA-UHFFFAOYSA-N sec-butylbenzene Chemical compound CCC(C)C1=CC=CC=C1 ZJMWRROPUADPEA-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- PJANXHGTPQOBST-UHFFFAOYSA-N stilbene Chemical class C=1C=CC=CC=1C=CC1=CC=CC=C1 PJANXHGTPQOBST-UHFFFAOYSA-N 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 125000001544 thienyl group Chemical group 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- PXXNTAGJWPJAGM-UHFFFAOYSA-N vertaline Natural products C1C2C=3C=C(OC)C(OC)=CC=3OC(C=C3)=CC=C3CCC(=O)OC1CC1N2CCCC1 PXXNTAGJWPJAGM-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/311—Purifying organic semiconductor materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/10—Transparent electrodes, e.g. using graphene
- H10K2102/101—Transparent electrodes, e.g. using graphene comprising transparent conductive oxides [TCO]
- H10K2102/103—Transparent electrodes, e.g. using graphene comprising transparent conductive oxides [TCO] comprising indium oxides, e.g. ITO
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
- H10K30/20—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising organic-organic junctions, e.g. donor-acceptor junctions
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
- H10K30/30—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising bulk heterojunctions, e.g. interpenetrating networks of donor and acceptor material domains
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
- H10K30/50—Photovoltaic [PV] devices
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/10—Organic polymers or oligomers
- H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
- H10K85/113—Heteroaromatic compounds comprising sulfur or selene, e.g. polythiophene
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/10—Organic polymers or oligomers
- H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
- H10K85/113—Heteroaromatic compounds comprising sulfur or selene, e.g. polythiophene
- H10K85/1135—Polyethylene dioxythiophene [PEDOT]; Derivatives thereof
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/10—Organic polymers or oligomers
- H10K85/151—Copolymers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/20—Carbon compounds, e.g. carbon nanotubes or fullerenes
- H10K85/211—Fullerenes, e.g. C60
- H10K85/215—Fullerenes, e.g. C60 comprising substituents, e.g. PCBM
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to an organic photoelectric conversion element.
- organic photoelectric conversion elements Compared with other elements such as inorganic photoelectric conversion elements, organic photoelectric conversion elements have advantages such as a simple structure and easy and inexpensive manufacture such as that they can be manufactured by printing. . However, the inferior photoelectric conversion efficiency has hindered practical use of organic photoelectric conversion elements.
- Patent Document 1 a compound that is a p-type semiconductor material is purified in advance by column chromatography using silica gel as a filler, and then this is formed into a p-type semiconductor layer.
- the present invention provides an organic photoelectric conversion element comprising an active layer having an inorganic compound content of a certain amount or less by purifying an electron donating compound using a specific adsorbent.
- the conversion element is excellent in photoelectric conversion efficiency.
- the present invention provides the following [1] to [6].
- An organic photoelectric conversion element comprising a pair of electrodes and an active layer located between the pair of electrodes and containing an organic compound, the phosphorus compound, palladium compound, and aluminum compound included in the active layer
- the organic photoelectric conversion element whose quantity of each inorganic compound of an iron compound, a calcium compound, a potassium compound, and a sodium compound is 30 weight ppm or less.
- An organic photoelectric conversion element comprising a pair of electrodes and an active layer located between the pair of electrodes and containing an organic compound, wherein the amount of palladium compound contained in the active layer is the amount of palladium
- the organic photoelectric conversion element which is 30 weight ppm or less.
- An organic photoelectric conversion device comprising an active layer containing an organic compound between a pair of electrodes and the pair of electrodes, wherein the amount of sodium compound contained in the active layer is 30 ppm by weight as the amount of sodium
- the organic photoelectric conversion element that is: [5] An organic photoelectric conversion device comprising an active layer containing an organic compound between a pair of electrodes and the pair of electrodes, wherein the amount of the iron compound contained in the active layer is 30 ppm by weight as the amount of iron
- the organic photoelectric conversion element that is: [6] A method for producing an organic photoelectric conversion device comprising a pair of electrodes and an active layer located between the pair of electrodes and containing an organic compound, wherein the electron donating compound as the organic compound is silica gel and The manufacturing method of an organic photoelectric conversion element including refine
- FIG. 1 is a diagram showing an example of a layer configuration of an organic photoelectric conversion element in the present invention.
- FIG. 2 is a diagram showing another example of the layer configuration of the organic photoelectric conversion element in the present invention.
- FIG. 3 is a diagram showing another example of the layer configuration of the organic photoelectric conversion element in the present invention.
- FIG. 4 is a graph showing current-voltage characteristics of the organic thin film solar cells of Example 1 and Comparative Example 1.
- FIG. 5 is a graph showing current-voltage characteristics of the organic thin-film solar cells of Example 2 and Comparative Example 2.
- FIG. 6 is a graph showing current-voltage characteristics of the organic thin-film solar cell of Comparative Example 3.
- organic photoelectric conversion element 20 substrate 32 first electrode 34 second electrode 40 active layer 42 first active layer 44 second active layer 52 first intermediate layer 54 second intermediate layer
- the basic configuration of the organic photoelectric conversion element of the present invention is a configuration having a pair of electrodes and an active layer. At least one of the pair of electrodes is transparent or translucent. In the organic photoelectric conversion element, the transparent or translucent electrode of the pair of electrodes is usually an anode. Of the pair of electrodes, the electrode that may not be transparent or translucent is usually a cathode. The position of the active layer in the organic photoelectric conversion element is usually between a pair of electrodes.
- the active layer may be a single layer or a plurality of layers. A layer other than the active layer may be provided between the pair of electrodes, and this layer may be referred to as an intermediate layer in this specification.
- the active layer is a layer containing an organic compound.
- the organic compound include an electron donating compound (p-type semiconductor) and an electron accepting compound (n-type semiconductor).
- the active layer may be a single layer or a laminate in which a plurality of layers are stacked.
- the active layer is of a so-called pn heterojunction type in which a layer formed of an electron donating compound (electron donating layer) and a layer formed of an electron accepting compound (electron accepting layer) are superimposed.
- FIGS. 1 to 3 are diagrams showing examples of the layer structure of the organic photoelectric conversion element.
- FIGS. 1 to 3 are diagrams showing examples of the layer structure of the organic photoelectric conversion element.
- a stacked body in which an active layer 40 is sandwiched between a first electrode 32 and a second electrode 34 is mounted on the substrate 20 to constitute the organic photoelectric conversion element 10.
- the substrate 20 is transparent or translucent.
- the first electrode 32 and the second electrode 34 are transparent or translucent.
- the first electrode 32 is transparent or translucent.
- Which of the first electrode 32 and the second electrode 34 is an anode and which is a cathode is not particularly limited.
- the vapor deposition is performed in a later process when the vapor deposition method is used for film formation of the cathode (for example, aluminum).
- the cathode for example, aluminum
- the first electrode 32 is an anode and the second electrode 34 is a cathode.
- the substrate 20 and the first electrode 32 are formed to be transparent or translucent so that the light can be taken from the substrate 20 side.
- the active layer 40 is composed of two layers, a first active layer 42 and a second active layer 44, and is a pn heterojunction type active layer.
- One of the first active layer 42 and the second active layer 44 is an electron accepting layer, and the other layer is an electron donating layer.
- first intermediate layer 52 and a second intermediate layer 54 are provided.
- the first intermediate layer 52 is located between the active layer 40 and the first electrode 32
- the second intermediate layer 54 is located between the active layer 40 and the second electrode 34. Only one of the first intermediate layer 52 and the second intermediate layer 54 may be provided.
- each intermediate layer is depicted as a single layer, but each intermediate layer may be composed of a plurality of layers.
- the intermediate layer may have various functions. Assuming the case where the first electrode 32 is an anode, the first intermediate layer 52 may be, for example, a hole transport layer, an electron blocking layer, a hole injection layer, and a layer having other functions. In this case, the second electrode 34 is a cathode, and the second intermediate layer 54 can be, for example, an electron transport layer, an electron block layer, and a layer having other functions. On the other hand, when the first electrode 32 is a cathode and the second electrode 34 is an anode, the positions of the intermediate layers are also changed accordingly.
- the organic photoelectric conversion element of the present invention is the organic photoelectric conversion element described above, and the amount of the inorganic compound contained in the active layer is 30 ppm by weight or less.
- inorganic compounds include phosphorus compounds, palladium compounds, aluminum compounds, iron compounds, calcium compounds, potassium compounds, and sodium compounds.
- the amount of the palladium compound in the active layer is 30 ppm by weight or less as the amount of palladium
- the amount of the sodium compound that is a compound containing sodium is 30 ppm by weight or less as the amount of sodium
- the amount of iron compound that is a compound containing iron is 30 ppm by weight or less as the amount of iron.
- the amount of each element of inorganic elements (phosphorus, palladium, aluminum, iron, calcium, potassium, and sodium) contained in the inorganic compound is 30 ppm by weight or less, preferably Is 10 ppm by weight or less, more preferably 1 ppm by weight or less.
- the lower limit of the inorganic compound contained in the active layer is not particularly limited as the total amount of inorganic elements contained in the inorganic compound, but is usually 0.01 ppm by weight or more.
- the unit “ppm” represents “weight ppm”.
- the active layer is a layer containing an organic compound.
- the organic compound contained in the active layer may include a combination of an electron donating compound and an electron accepting compound as described above.
- the electron-donating compound and the electron-accepting compound are not particularly limited, and can be determined relatively from the energy level of the energy level of these compounds.
- Examples of the electron donating compound include pyrazoline derivatives, arylamine derivatives, stilbene derivatives, triphenyldiamine derivatives, oligothiophene and derivatives thereof, polyvinylcarbazole and derivatives thereof, polysilane and derivatives thereof, and aromatic amines in side chains or main chains. And polysiloxane derivatives, polyaniline and derivatives thereof, polythiophene and derivatives thereof, polypyrrole and derivatives thereof, polyphenylene vinylene and derivatives thereof, polythienylene vinylene and derivatives thereof, and the like. Of these, oligothiophene and its derivatives are preferred, and poly (3-hexylthiophene) (P3HT) is more preferred.
- P3HT poly (3-hexylthiophene)
- a compound having a structural unit represented by the following formula (1) is also preferable.
- the compound having a structural unit represented by the formula (1) preferably further has a structural unit represented by the formula (2).
- Ar 1 and Ar 2 are the same or different and represent a trivalent heterocyclic group.
- R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are the same or different and are a hydrogen atom, a halogen atom, an alkyl group, an alkyloxy group, an alkylthio group, an aryl group, an aryloxy group, an arylthio group, Arylalkyl group, arylalkyloxy group, arylalkylthio group, acyl group, acyloxy group, amide group, acid imide group, imino group, amino group, substituted amino group, substituted silyl group, substituted silyloxy group, substituted silylthio group, substituted silylamino Represents a monovalent heterocyclic group, heterocyclic oxy group, heterocyclic thio group, arylalkenyl group, arylalkynyl group, carboxyl group or cyano group.
- R 50 is a hydrogen atom, halogen atom, alkyl group, alkyloxy group, alkylthio group, aryl group, aryloxy group, arylthio group, arylalkyl group, arylalkyloxy group, arylalkylthio group, acyl group, acyloxy group, amide Group, acid imide group, imino group, amino group, substituted amino group, substituted silyl group, substituted silyloxy group, substituted silylthio group, substituted silylamino group, monovalent heterocyclic group, heterocyclic oxy group, heterocyclic thio group, aryl An alkenyl group, an arylalkynyl group, a carboxyl group or a cyano group is represented.
- R 51 is an alkyl group having 6 or more carbon atoms, an alkyloxy group having 6 or more carbon atoms, an alkylthio group having 6 or more carbon atoms, an aryl group having 6 or more carbon atoms, an aryloxy group having 6 or more carbon atoms, or 6 or more carbon atoms.
- X 1 and Ar 2 are bonded to the adjacent position of the heterocyclic ring contained in Ar 1
- C (R 50 ) (R 51 ) and Ar 1 are bonded to the adjacent position of the heterocyclic ring contained in Ar 2 . .
- a polymer compound having a weight average molecular weight in terms of polystyrene calculated using a standard polystyrene sample is preferably 3000 to 10000000. If the weight average molecular weight is lower than 3000, defects may occur in film formation during device fabrication, and if it exceeds 10000000, solubility in a solvent or applicability during device fabrication may be reduced.
- the weight average molecular weight of the electron donating compound is more preferably 8000 to 5000000, and particularly preferably 10,000 to 1000000.
- the electron donating compounds may be used alone or in combination of two or more.
- the electron donating compound is preferably a compound purified by an adsorbent containing both silica and alumina.
- impurities in the electron-donating compound are removed, and the amount of the inorganic compound contained in the active layer can be suppressed to 30 ppm by weight or less, thereby reducing charge traps that cause deterioration of the performance of the organic photoelectric conversion element. And photoelectric conversion efficiency can be improved.
- the conditions for purification using an adsorbent containing silica gel and alumina are not particularly limited, and may be appropriately selected depending on the type, amount, or other conditions of the compound.
- Examples of the purification method using an adsorbent containing silica and alumina include a method using a column packed with silica and alumina. For example, there is a method in which an electron donating compound is dissolved in a solvent to prepare a liquid, the liquid is passed through a column packed with silica and alumina, and the compound is separated from the liquid after passing.
- the solvent that can be used may be either water or an organic solvent.
- Examples of the organic solvent include halogenated unsaturated hydrocarbon solvents such as chlorobenzene, dichlorobenzene, and trichlorobenzene; unsaturated hydrocarbon solvents; ether solvents, etc.
- halogenated unsaturated hydrocarbon solvents are preferable, and dichlorobenzene is More preferred is orthodichlorobenzene, even more preferred.
- Examples of the method for separating the compound after purification include a method of pouring the liquid after passing through the column into a hydrophilic solvent (such as methanol) such as alcohol to precipitate, and a method of filtering and drying the compound after precipitation. .
- Examples of the electron-accepting compound include oxadiazole derivatives, anthraquinodimethane and its derivatives, benzoquinone and its derivatives, naphthoquinone and its derivatives, anthraquinone and its derivatives, tetracyanoanthraquinodimethane and its derivatives, fluorenone derivatives, Diphenyldicyanoethylene and its derivatives, diphenoquinone derivatives, metal complexes of 8-hydroxyquinoline and its derivatives, polyquinoline and its derivatives, polyquinoxaline and its derivatives, polyfluorene and its derivatives, fullerenes such as C 60 and its derivatives, bathocuproine, etc.
- Phenanthrene derivatives metal oxides such as titanium oxide, carbon nanotubes, and the like.
- titanium oxide, carbon nanotubes, fullerenes, and fullerene derivatives are preferable, and fullerenes and fullerene derivatives are particularly preferable.
- fullerene examples include C 60 fullerene, C 70 fullerene, C 76 fullerene, C 78 fullerene, such as C 84 fullerene, and the like.
- fullerene derivatives C 60 fullerene derivatives, C 70 fullerene derivatives, C 76 fullerene derivatives, C 78 fullerene derivatives, and C 84 fullerene derivatives.
- Specific examples of the fullerene derivative include the following.
- [5,6] - phenyl C 61 butyric acid methyl ester [5,6] -PCBM), [6,6] phenyl -C 61 butyric acid methyl ester ([6,6 ] -PCBM, C60PCBM, [6,6] -Phenyl C 61 butyric acid methyl ester), [6,6] phenyl -C 71 butyric acid methyl ester (C 70 PCBM, [6,6] -Phenyl C 71 butyric acid methyl ester), [6,6] phenyl -C 85 butyric acid methyl ester (C 84 PCBM, [6,6] -Phenyl C 85 butyric acid methyl ester), [6,6] thienyl -C 61 butyric acid methyl ester ([6 , 6] -Thienyl C 61 buty ic acid methyl ester) and the like.
- fullerenes and fullerene derivatives are preferable among the above specific examples, and [5,6] -PCBM and [6,6] -PCBM are more preferable.
- the ratio of the fullerene derivative is preferably 10 to 1000 parts by weight and more preferably 20 to 500 parts by weight with respect to 100 parts by weight of the electron donating compound. .
- the electron-accepting compound is not limited to one type of compound, and two or more types of compounds can be used in combination.
- the active layer can be formed by depositing a liquid containing an organic compound.
- an electron-donating compound as an organic compound is purified with a silica alumina column, and an organic compound containing an electron-donating compound after purification (that is, other than the electron-donating compound after purification and the electron-donating compound after purification) And a method of forming an active layer by forming a liquid containing one or more organic compounds).
- an organic photoelectric conversion element having an inorganic compound amount of 30 ppm by weight or less can be efficiently produced.
- the liquid containing the organic compound can be prepared by dissolving the organic compound in a solvent.
- the solvent is appropriately selected depending on the types of the electron-donating compound and the electron-accepting compound, and water and organic solvents are exemplified.
- the organic solvent include toluene, xylene, mesitylene, tetralin, decalin, bicyclohexyl, unsaturated hydrocarbon solvents such as n-butylbenzene, sec-butylbenzene, tert-butylbenzene, carbon tetrachloride, chloroform, dichloromethane, Halogenated saturated hydrocarbon solvents such as dichloroethane, chlorobutane, bromobutane, chloropentane, bromopentane, chlorohexane, bromohexane, chlorocyclohexane and bromocyclohexane, halogenated unsaturated hydrocarbon solvents such as chlorobenzene,
- the amount of the organic compound added to the solvent is not particularly limited, and an optimum range can be appropriately selected. Usually, it is 0.1% by weight or more, preferably 0.2% by weight or more, more preferably 0.5%. It is the amount which becomes weight% or more.
- the total amount of the electron donating compound and the electron accepting compound is usually 0 in the liquid. .2% by weight or more, preferably 0.5% by weight or more, more preferably 1% by weight or more.
- the compounding ratio of the electron donating compound and the electron accepting compound can be usually adjusted to 1 to 20:20 to 1, preferably 1 to 10:10 to 1, more preferably 1 to 5: 5 to 1. .
- the electron donating compound or the electron accepting compound is usually 0.4% by weight or more in the liquid, Preferably, it is added in an amount of 0.6% by weight or more, more preferably 2% by weight or more.
- a liquid containing an organic compound may be filtered. Thereby, the photoelectric conversion efficiency can be further improved.
- the pore size of the filter is usually 10 to 0.1 ⁇ m, preferably 5 to 0.1 ⁇ m, more preferably 0.15 to 0.1 ⁇ m.
- a liquid containing an organic compound may be applied on the electrode or the intermediate layer, and the solvent may be volatilized.
- the coating method include a coating method.
- the coating method spin coating method, casting method, micro gravure coating method, gravure coating method, bar coating method, roll coating method, wire bar coating method, dip coating method, spray coating method, screen printing method, gravure printing method, Examples include a flexographic printing method, an offset printing method, an ink jet printing method, a dispenser printing method, a nozzle coating method, and a capillary coating method.
- the spin coating method, flexographic printing method, gravure printing method, ink jet printing method, and dispenser printing method are preferable, and the spin coating method is more preferable.
- an active layer of a bulk heterojunction type
- a liquid containing both an electron-donating compound and an electron-accepting compound is applied onto the electrode or the intermediate layer, and the solvent is volatilized.
- an active layer can be formed.
- an organic photoelectric conversion element having an active layer of pn heterojunction type for example, a liquid containing an electron donating compound and a liquid containing an electron accepting compound are prepared, and an electron donating compound is prepared.
- the liquid containing is applied on an electrode or an intermediate layer, and the solvent is evaporated to form an electron donating layer.
- a liquid containing an electron accepting compound is applied onto the electron donating layer, and the solvent is volatilized to form an electron accepting layer.
- an active layer having a two-layer structure can be formed.
- the order of forming the electron donating layer and the electron accepting layer may be reversed.
- the thickness of the active layer is usually 1 nm to 100 ⁇ m, preferably 2 nm to 1000 nm, more preferably 5 nm to 500 nm, and even more preferably 20 nm to 200 nm.
- An example of producing the organic photoelectric conversion device of the present invention is an example in which an electrode is formed on a substrate, an active layer is formed as described above, and then an electrode is formed on the active layer.
- the organic photoelectric conversion element illustrated in FIG. 1 or FIG. 2 is obtained.
- an electrode is formed on the substrate, an intermediate layer is formed on the electrode, an active layer is formed as described above, an intermediate layer is then formed on the active layer, and an electrode is further formed on the intermediate layer.
- the organic photoelectric conversion element illustrated in FIG. 3 can be formed.
- various thin film forming methods can be appropriately selected in consideration of conditions such as the type and thickness of the electrode material.
- various thin film forming methods can be appropriately selected in consideration of conditions such as the type and thickness of the electrode material.
- the above-described coating methods can be employed as appropriate, and vacuum deposition, sputtering, chemical vapor deposition (CVD), etc. can be employed. May be.
- an active layer may be formed directly on the substrate, or optionally after being subjected to other steps such as heating, UV-O 3 treatment, atmospheric exposure, etc. A layer may be formed.
- the substrate may be any substrate that does not chemically change when the electrode is formed and when the organic layer is formed.
- the material for the substrate include glass, plastic, polymer film, and silicon.
- the opposite electrode that is, the electrode farther from the substrate of the pair of electrodes
- Examples of the electrode material constituting the transparent or translucent electrode include a conductive metal oxide film and a translucent metal thin film. Specifically, indium oxide, zinc oxide, tin oxide, and a composite of two or more thereof (eg, indium tin oxide (ITO), indium zinc oxide (IZO), NESA), etc. Films produced using materials; metal thin films such as gold, platinum, silver, and copper are exemplified, and films produced using conductive materials such as ITO, indium / zinc / oxide, and tin oxide are preferred. Examples of the electrode manufacturing method include a vacuum deposition method, a sputtering method, an ion plating method, and a plating method. Moreover, you may use organic transparent conductive films, such as polyaniline and its derivative (s), polythiophene, and its derivative (s) as an electrode material.
- the electrode paired with the transparent or translucent electrode may be transparent or translucent, but may be transparent or not translucent.
- the electrode material constituting the electrode include metals and conductive polymers. Specific examples of the electrode material include lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, barium, aluminum, scandium, vanadium, zinc, yttrium, indium, cerium, samarium, europium, terbium, ytterbium, and the like.
- Two or more alloys of the metals include magnesium-silver alloy, magnesium-indium alloy, magnesium-aluminum alloy, indium-silver alloy, lithium-aluminum alloy, lithium-magnesium alloy, lithium-indium alloy, and calcium-aluminum alloy.
- the material for the intermediate layer examples include alkali metals such as lithium fluoride (LiF), halides and oxides of alkaline earth metals.
- alkali metals such as lithium fluoride (LiF)
- halides and oxides of alkaline earth metals.
- fine particles of inorganic semiconductor such as titanium oxide, PEDOT (poly (3,4) ethylenedioxythiophene) and the like are also exemplified.
- the anode side intermediate layer is preferably PEDOT
- the cathode side intermediate layer is preferably alkali metal (more preferably LiF).
- the organic photoelectric conversion element manufactured by the manufacturing method of the present invention operates as an organic thin film solar cell because photovoltaic power is generated between the electrodes by irradiating light such as sunlight from a transparent or translucent electrode. You may let them. Moreover, you may use as an organic thin film solar cell module by integrating a plurality of organic thin film solar cells.
- the organic light sensor may be operated. And you may use as an organic image sensor by integrating a plurality of organic optical sensors.
- Organic thin-film solar cells can have basically the same module structure as conventional solar cell modules.
- a solar cell module generally has a structure in which cells are formed on a support substrate such as metal or ceramic, and the cell is covered with a filling resin, protective glass, etc., and light is taken in from the opposite side of the support substrate.
- a transparent support substrate made of a transparent material such as tempered glass can be used as the support substrate, and a cell can be formed on the support substrate to receive light from the transparent support substrate side.
- a module structure called a super straight type, a substrate type, and a potting type, a substrate integrated module structure used in an amorphous silicon solar cell, and the like are known.
- the module structure of the organic thin film solar cell of the present invention can also be appropriately selected from these module structures depending on the purpose of use, the place of use or the environment.
- a typical module structure called super straight type or substrate type has cells arranged at regular intervals between support substrates that are transparent on one or both sides and treated with antireflection, and adjacent cells are metal leads or flexible wiring.
- the current collector electrode is arranged at the outer edge portion and the generated power is taken out to the outside.
- plastic materials such as ethylene vinyl acetate (EVA) may be used between the substrate and the cell in the form of a film or a filling resin depending on the purpose in order to protect the cell or improve the current collection efficiency.
- EVA ethylene vinyl acetate
- the protective function can be achieved by configuring the surface protective layer with a transparent plastic film or by curing the filled resin.
- the periphery of the support substrate is usually fixed in a sandwich shape with a metal frame.
- the support substrate and the frame are usually hermetically sealed with a sealing material.
- a flexible material is used as the material of the cell itself, the material of the support substrate, the filling material, and the sealing material, a solar cell can be formed on the curved surface.
- a solar cell using a flexible support such as a polymer film
- cells are sequentially formed while feeding out a roll-shaped support, cut to a desired size, and then the periphery is sealed with a flexible and moisture-proof material.
- the battery body can be produced.
- a solar cell using a flexible support can also have a module structure called “SCAF” described in Solar Energy Materials and Solar Cells, 48, p383-391.
- SCAF solar Energy Materials and Solar Cells, 48, p383-391.
- a solar cell using a flexible support can be used by being bonded and fixed to a curved glass or the like.
- cracks may occur on the coating film. Further, insoluble components and / or dust may become nuclei and aggregated particles may be generated.
- the occurrence of cracks and the occurrence of agglomerated flow leads to phenomena such as poor electrical or chemical contact at the bonding interface and the occurrence of leakage current. According to the present invention, the occurrence of these phenomena can be reduced, so that the photoelectric conversion efficiency is improved.
- Example 1 Preparation of an organic photoelectric conversion element
- a glass substrate on which ITO having a thickness of about 150 nm formed by sputtering was patterned was washed with an organic solvent, an alkaline detergent, and ultrapure water and dried. This substrate was subjected to UV-O 3 treatment using a UV-O 3 apparatus.
- a suspension of an aqueous solution of poly (3,4) ethylenedioxythiophene / polystyrene sulfonic acid dissolved in water was filtered through a 0.5 micron filter.
- the suspension after filtration was formed into a film with a thickness of 70 nm by spin coating on the ITO surface side of the substrate, and dried at 200 ° C. for 10 minutes on a hot plate in the air.
- the polymer compound A was purified. That is, it melt
- the content of the inorganic compound in the polymer compound A was as follows: iron 10 wt ppm or less, palladium 10 wt ppm or less, phosphorus 10 wt ppm or less, sodium 14 wt ppm, potassium 10 wt ppm or less, calcium 10 weight ppm or less, aluminum 10 weight ppm or less.
- An orthodichlorobenzene solution having a weight ratio of 1: 3 was prepared between the purified polymer compound A and [6,6] -phenyl C61 butyric acid methyl ester ([6,6] -PCBM).
- the amount of the polymer compound A added was 0.5% by weight with respect to orthodichlorobenzene.
- the said ortho dichlorobenzene solution was filtered with the filter of a 0.2 micrometer diameter. The obtained extract was spin-coated and then dried in an N 2 atmosphere.
- LiF was deposited to a thickness of about 2.3 nm and then Al to a thickness of about 70 nm in a resistance heating vapor deposition apparatus to form an electrode. Furthermore, the sealing process was given by adhere
- an epoxy resin rapid hardening type Araldite
- Example 2 (Production of organic photoelectric conversion element) A glass substrate on which ITO having a thickness of about 150 nm formed by sputtering was patterned was washed with an organic solvent, an alkaline detergent, and ultrapure water and dried. This substrate was subjected to UV-O 3 treatment using a UV-O 3 apparatus.
- a suspension of an aqueous solution of poly (3,4) ethylenedioxythiophene / polystyrene sulfonic acid dissolved in water was filtered through a 0.5 micron filter.
- the suspension after filtration was formed into a film with a thickness of 70 nm by spin coating on the ITO surface side of the substrate, and dried at 200 ° C. for 10 minutes on a hot plate in the air.
- polymer compound B was dissolved again in 30 mL of o-dichlorobenzene, passed through an alumina / silica gel column, and the resulting solution was poured into methanol to precipitate a polymer.
- the polymer was filtered, dried, and purified.
- the content of the inorganic compound in the purified polymer compound B was as follows: phosphorus 10 wt ppm or less, palladium 10 wt ppm or less, aluminum 10 wt ppm or less, calcium 10 wt ppm or less, potassium 10 Weight ppm or less, iron 10 ppm or less, and sodium 10 weight ppm or less.
- an electrode was formed on the active layer thus formed by depositing LiF with a thickness of about 2.3 nm and subsequently with Al in a thickness of about 70 nm in a resistance heating vapor deposition apparatus. Furthermore, the sealing process was given by adhere
- Example 1 (Production of organic photoelectric conversion element)
- an organic photoelectric conversion element was produced in the same manner except that the polymer compound A was not purified.
- the content of the inorganic compound in the polymer compound A was as follows: phosphorus 850 wt ppm, palladium 19 wt ppm, aluminum 380 wt ppm or less, calcium 110 wt ppm or less, potassium 13 wt ppm
- iron 280 ppm and sodium 46 weight ppm was as follows: phosphorus 850 wt ppm, palladium 19 wt ppm, aluminum 380 wt ppm or less, calcium 110 wt ppm or less, potassium 13 wt ppm
- iron 280 ppm and sodium 46 weight ppm was produced in the same manner except that the polymer compound A was not purified.
- the content of the inorganic compound in the polymer compound A was as follows: phosphorus 850 wt ppm, palladium 19
- Comparative Example 2 (Production of organic photoelectric conversion element) An organic photoelectric conversion device was produced in the same manner as in Example 2 except that the polymer compound B was not purified.
- the content of the inorganic compound in the polymer compound B was as follows: phosphorus 110 wt ppm, palladium 580 wt ppm, aluminum 10 wt ppm or less, calcium 10 wt ppm or less, potassium 10 wt ppm Below, and 79 weight ppm sodium.
- Comparative Example 3 Preparation of organic photoelectric conversion element
- This substrate was UV-O 3 treated with a UV-O 3 apparatus with the ITO surface facing up.
- a suspension of an aqueous solution of poly (3,4) ethylenedioxythiophene / polystyrene sulfonic acid dissolved in water was filtered through a 0.5 micron filter.
- the suspension after filtration was formed into a film with a thickness of 70 nm by spin coating on the ITO surface side of the substrate, and dried at 200 ° C. for 10 minutes on a hot plate in the air.
- P3HT poly (3-hexylthiophene)
- P3HT poly (3-hexylthiophene)
- [6,6] -phenyl C61 butyric acid methyl ester [6,6] -PCBM
- LiF is deposited to a thickness of about 2.3 nm and then Al is deposited to a thickness of about 70 nm in a resistance heating vapor deposition apparatus to form an electrode.
- the sealing process was given by adhere
- the shape of the organic thin film solar cell which is the organic photoelectric conversion element obtained in the examples and comparative examples, was a regular square of 2 mm ⁇ 2 mm. These organic thin film solar cells were irradiated with a constant light using a solar simulator (trade name: CEP-2000, manufactured by Spectrometer Co., Ltd., irradiance: 100 mW / cm 2 ), and the generated current and voltage were measured. The photoelectric conversion efficiency was calculated. Table 1 shows the short-circuit current density, open-circuit voltage, fill factor, and photoelectric conversion efficiency of each organic thin-film solar cell. Also, the current-voltage characteristics of the organic thin film solar cells of Example 1 and Comparative Example 1 are shown in FIG. 4, the current-voltage characteristics of the organic thin film solar cells of Example 2 and Comparative Example 2 are shown in FIG. The current-voltage characteristics of the organic thin film solar cell No. 3 are shown in FIG.
- the organic thin film solar cells of Example 1 and Example 2 all showed higher photoelectric conversion efficiency than the organic thin film solar cells of Comparative Examples 1 to 3.
- the present invention is useful because it provides an organic photoelectric conversion element and a method for producing the same.
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Abstract
Description
〔1〕一対の電極と、前記一対の電極の間に位置し、有機化合物を含む活性層とを備える有機光電変換素子であって、前記活性層に含まれる、リン化合物、パラジウム化合物、アルミニウム化合物、鉄化合物、カルシウム化合物、カリウム化合物、及びナトリウム化合物の各々の無機化合物の量が30重量ppm以下である有機光電変換素子。
〔2〕前記有機化合物が、シリカゲル及びアルミナを含む吸着剤により精製された電子供与性化合物である、上記〔1〕に記載の有機光電変換素子。
〔3〕一対の電極と、前記一対の電極の間に位置し、有機化合物を含む活性層とを備える有機光電変換素子であって、前記活性層に含まれるパラジウム化合物の量がパラジウムの量として30重量ppm以下である有機光電変換素子。
〔4〕一対の電極と、前記一対の電極の間に、有機化合物を含む活性層を備える有機光電変換素子であって、前記活性層に含まれるナトリウム化合物の量がナトリウムの量として30重量ppm以下である有機光電変換素子。
〔5〕一対の電極と、前記一対の電極の間に、有機化合物を含む活性層を備える有機光電変換素子であって、前記活性層に含まれる鉄化合物の量が鉄の量として30重量ppm以下である有機光電変換素子。
〔6〕一対の電極と、前記一対の電極の間に位置し、有機化合物を含む活性層とを備える有機光電変換素子の製造方法であって、前記有機化合物としての電子供与性化合物をシリカゲル及びアルミナを含む吸着剤で精製すること、精製後の電子供与性化合物を含む有機化合物を含有する液から前記活性層を成膜することを含む、有機光電変換素子の製造方法。
20 基板
32 第1電極
34 第2電極
40 活性層
42 第1活性層
44 第2活性層
52 第1中間層
54 第2中間層
R3、R4、R5、R6、R7及びR8は、同一又は相異なり、水素原子、ハロゲン原子、アルキル基、アルキルオキシ基、アルキルチオ基、アリール基、アリールオキシ基、アリールチオ基、アリールアルキル基、アリールアルキルオキシ基、アリールアルキルチオ基、アシル基、アシルオキシ基、アミド基、酸イミド基、イミノ基、アミノ基、置換アミノ基、置換シリル基、置換シリルオキシ基、置換シリルチオ基、置換シリルアミノ基、1価の複素環基、複素環オキシ基、複素環チオ基、アリールアルケニル基、アリールアルキニル基、カルボキシル基又はシアノ基を表す。R50は、水素原子、ハロゲン原子、アルキル基、アルキルオキシ基、アルキルチオ基、アリール基、アリールオキシ基、アリールチオ基、アリールアルキル基、アリールアルキルオキシ基、アリールアルキルチオ基、アシル基、アシルオキシ基、アミド基、酸イミド基、イミノ基、アミノ基、置換アミノ基、置換シリル基、置換シリルオキシ基、置換シリルチオ基、置換シリルアミノ基、1価の複素環基、複素環オキシ基、複素環チオ基、アリールアルケニル基、アリールアルキニル基、カルボキシル基又はシアノ基を表す。R51は、炭素数6以上のアルキル基、炭素数6以上のアルキルオキシ基、炭素数6以上のアルキルチオ基、炭素数6以上のアリール基、炭素数6以上のアリールオキシ基、炭素数6以上のアリールチオ基、炭素数7以上のアリールアルキル基、炭素数7以上のアリールアルキルオキシ基、炭素数7以上のアリールアルキルチオ基、炭素数6以上のアシル基又は炭素数6以上のアシルオキシ基を表す。X1とAr2は、Ar1に含まれる複素環の隣接位に結合し、C(R50)(R51)とAr1は、Ar2に含まれる複素環の隣接位に結合している。
スパッタリング法にて成膜された約150nmの膜厚のITOがパターニングされたガラス基板を有機溶媒、アルカリ洗剤、超純水で洗浄し、乾かした。この基板に、UV-O3装置にてUV-O3処理を行った。
スパッタリング法にて成膜された約150nmの膜厚のITOがパターニングされたガラス基板を有機溶媒、アルカリ洗剤、超純水で洗浄し、乾かした。この基板に、UV-O3装置にてUV-O3処理を行った。
実施例1において、高分子化合物Aの精製を行わなかったこと以外は同様にして有機光電変換素子を作製した。この場合の高分子化合物A中の、無機化合物の含有量は、下記のとおりであった:リン850重量ppm、パラジウム19重量ppm、アルミニウム380重量ppm以下、カルシウム110重量ppm以下、カリウム13重量ppm以下、鉄280ppm、及びナトリウム46重量ppm。
実施例2において、高分子化合物Bの精製を行わなかったこと以外は同様にして有機光電変換素子を作製した。この場合の高分子化合物B中の、無機化合物の含有量は、下記のとおりであった:リン110重量ppm、パラジウム580重量ppm、アルミニウム10重量ppm以下、カルシウム10重量ppm以下、カリウム10重量ppm以下、及びナトリウム79重量ppm。
スパッタリング法にて成膜された約150nmの膜厚のITOがパターニングされたガラス基板を有機溶媒、アルカリ洗剤、超純水で洗浄し、乾かした。この基板に、ITO面を上にしてUV-O3装置にてUV-O3処理を行った。
実施例及び比較例において得られた有機光電変換素子である有機薄膜太陽電池の形状は、2mm×2mmの正四角形であった。これらの有機薄膜太陽電池に、ソーラシミュレーター(分光計器製、商品名:CEP-2000型、放射照度100mW/cm2)を用いて一定の光を照射し、発生する電流と電圧を測定して、光電変換効率を算出した。各有機薄膜太陽電池の短絡電流密度、開放端電圧、曲線因子及び光電変換効率を表1に示す。また、実施例1及び比較例1の各有機薄膜太陽電池の電流-電圧特性を図4に、実施例2及び比較例2の各有機薄膜太陽電池の電流-電圧特性を図5に、比較例3の有機薄膜太陽電池の電流-電圧特性を図5に、それぞれ示す。
Claims (6)
- 一対の電極と、前記一対の電極の間に位置し、有機化合物を含む活性層とを備える有機光電変換素子であって、
前記活性層に含まれる、リン化合物、パラジウム化合物、アルミニウム化合物、鉄化合物、カルシウム化合物、カリウム化合物、及びナトリウム化合物の各々の無機化合物の量が30重量ppm以下である有機光電変換素子。 - 前記有機化合物が、シリカゲル及びアルミナを含む吸着剤により精製された電子供与性化合物である、請求項1に記載の有機光電変換素子。
- 一対の電極と、前記一対の電極の間に位置し、有機化合物を含む活性層とを備える有機光電変換素子であって、
前記活性層に含まれるパラジウム化合物の量がパラジウムの量として30重量ppm以下である有機光電変換素子。 - 一対の電極と、前記一対の電極の間に位置し、有機化合物を含む活性層とを備える有機光電変換素子であって、
前記活性層に含まれるナトリウム化合物の量がナトリウムの量として30重量ppm以下である有機光電変換素子。 - 一対の電極と、前記一対の電極の間に、有機化合物を含む活性層とを備える有機光電変換素子であって、
前記活性層に含まれる鉄化合物の量が鉄の量として30重量ppm以下である有機光電変換素子。 - 一対の電極と、前記一対の電極との間に位置し、有機化合物を含む活性層とを備える有機光電変換素子の製造方法であって、
前記有機化合物としての電子供与性化合物をシリカゲル及びアルミナを含む吸着剤で精製すること、精製後の電子供与性化合物を含む有機化合物を含有する液から前記活性層を成膜することを含む、有機光電変換素子の製造方法。
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