CN102280589A - Organic solar cell and preparation method thereof - Google Patents
Organic solar cell and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an anode modification technology for an organic micromolecule device having a heterogenous junction and belongs to the field of photoelectric conversion. The defect of low conversion efficiency in the prior art is overcome, an anode interface is modified through an anode insertion layer, anode exciton splitting is suppressed, and the carrier collection efficiency and energy conversion efficiency are improved. The main technical characteristics are that: an anode modification layer is arranged on a transparent electrode and is used for suppressing anode interface exciton splitting; and a heterogenous junction structure consisting of photosensitive layers of an electron donor and an electron acceptor is arranged on the modification layer. The anode interface exciton splitting is effectively suppressed on an anode-donor interface, and carriers can be effectively collected; therefore, the energy conversion efficiency of an organic solar cell is improved.
Description
Technical field
The invention discloses a kind of heterojunction organic molecule device anode modification technology that has, belong to the opto-electronic conversion field.
Background technology
Solar cell be a kind of be the photovoltaic device of electric energy with transform light energy.Reported that since Bell Laboratory in 1954 efficient is 4% inorganic solar cell, since half a century, solar cell has obtained development at full speed, all starts Lai Yichang " green energy resource revolution " in the world.At present, the high conversion efficiency of amorphous silicon thin-film solar cell reaches more than 10% in the production of silicon-based film solar cells large-scale industrial.After the nineties in 20th century, photovoltaic devices such as GaAs, cadmium telluride have been attached again in the inorganic thin film solar cell family.The research of organic solar batteries starts from 1958, Kearns and Calvin are clipped in magnesium phthalocyanine dye (MgPc) between the electrode of two different work functions, make " sandwich " structure, thereby obtained the open circuit voltage of 200mV, but its short circuit current output is then very low, so its energy conversion efficiency is also relatively low.This individual layer organic solar energy cell structure was adopted double-deck heterojunction structure to substitute (anode/give body/acceptor/resilient coating/negative electrode) in 1986 by C.W.Tang, had obtained 1% energy conversion efficiency.The reason that energy conversion efficiency is increased dramatically, promptly thinking is provided due to the interface that exciton splits efficiently by double-deck heterojunction structure, and in other words, double-deck heterostructure makes neutral electron-hole pair split into free carrier and becomes more easy.But the organic solar batteries energy conversion efficiency is still lower at present, and the laboratory is the highest about 8%, and small lot batch manufacture is generally about 4%, is an important difficult problem that restricts its development at present.In recent years, organic solar batteries more and more receives the concern of industry.Be owing to the less expensive of organic material own, wide material sources on the one hand, have rich diversity; In addition, the relative traditional silicon base battery of the course of processing is comparatively simple, and the cost of element manufacturing is relatively low.In organic solar batteries, absorb sunlight and at first produce the electron hole pair with certain binding force, i.e. exciton.Exciton externally is electric neutrality, must carry out after the exciton fractionation, and photoelectric current, photovoltage output just can be arranged.Chinese patent CN201010200494.X " disclosing functional layer is the organic solar batteries of individual layer organic material " does not have the organic solar batteries of heterojunction to carry out modification to a kind of, and anode has one deck photosensitive layer.Its function mainly is that the exciton at antianode interface splits, and will suppress the unwanted electric charge of anodic interface on the one hand and inject, and depends on this exciton simultaneously again and splits and obtain photoelectric current, and be difficult to control at actual mechanical process.The operation principle of organic solar batteries (hereinafter to be referred as machine battery is arranged) is different from silica-based solar cell, has machine battery to absorb sunlight and at first produces the electron hole pair with certain binding force, i.e. exciton.Exciton externally is electric neutrality, and must carry out just can have the output of photoelectric current, photovoltage after the exciton fractionation.
Summary of the invention
The objective of the invention is to overcome above-mentioned shortcoming, adopt anode insert layer modified anode interface, split thereby suppress the anode exciton, to improve carrier collection efficient and energy conversion efficiency.Two of purpose, the semi-conducting material of selecting broad stopband, low mobility for use are as the anode modification layer, to obtain heterojunction organic molecule solar cell.
For realizing task of the present invention, the technical solution that proposes is: based on the heterojunction of organic molecule, constitute by the transparent insulation substrate that stacks gradually, transparency electrode, electron donor-acceptor, resilient coating, high reflectance electrode, it is characterized in that having above the transparency electrode one to be used to suppress the anode modification layer that the anodic interface exciton splits; This forms heterojunction structure by the photosensitive layer of electron donor and electron acceptor above anode modification layer, is the important area that produces photoelectric current.
The about 0.5-5nm of the thickness of anode modification layer is inserted between anode and the electron donor layer, forms the triangle potential barrier, improves the collection efficiency of charge carrier by tunneling effect.
The interface of electron donor-acceptor has two photosensitive layers at least, as above the anode modification layer of electron donor being that first photosensitive layer and second photosensitive layer on it constitute the organic molecule heterojunction.Second photosensitive layer is to be deposited on above first photosensitive layer of electron donor as electron acceptor.
The anode modification layer comprises silicon dioxide (SiO
2), lithium fluoride (LiF), titanium dioxide (TiO
2) in interior broad stopband, low carrier mobility thin-film material.The anode modification layer is to be deposited on the anode that comprises by transparent oxide, metallic film or carbon nanotube conductive thin film.
The first photosensitive layer series electron donor material above the anode modification layer comprises the hole mobile material of phthalocyanine dye, pentacene, porphyrin compound, cyanine dyes; Also comprise the electron acceptor material on second photosensitive layer.Electron acceptor on second photosensitive layer also comprises the derivative electron transport material or the inorganic nano material PEDOT:PSS of the macromolecule aqueous polymer that a kind of conductance is very high.
The present invention also provides a kind of organic solar batteries preparation method of the heterojunction based on organic molecule, cleans the transparent insulation glass substrate; Sputter or vapour deposition conductive film; Laser grooving and scribing or corroding electrode figure sample are transparent anode;
It is characterized in that
The preparation method of anode decorative layer on the transparency electrode: comprise
Adopt the vacuum evaporation anode modification layer of on transparency electrode, grow, also comprise the film thickness that the control by temperature, time deposits;
Adopt the vacuum evaporation light-sensitive material of on the anode modification layer, growing, produce the main region of photoelectric current as the solar cell absorbing light.
The vacuum evaporation photosensitive layer of growing on the anode modification layer, at least twice plated film obtains compound photosensitive layer, forms heterostructure.Growth anode modification layer on transparency electrode, the about 0.5-5nm of film thickness of control deposition.Adopt at least two photosensitive layers of vacuum evaporation, as being first photosensitive layer above the anode modification layer of electron donor, form the organic molecule heterojunction with second photosensitive layer on it.
Sunlight is from transparent insulation substrate and transparency electrode one side incident, because the very thin thickness of anode modification layer, generally about 0.5-5nm, thereby its loss to sunlight is very little, can ignore, so most of sunlight is still absorbed by photosensitive layer.Photosensitive layer absorbs after the photon energy, can produce a spot of free carrier, and situation but more is to produce the electron-hole pair with certain binding force, just exciton.Neutral exciton is diffused into donor-receiver at the interface, because the difference of electron affinity and ionization energy, exciton can split into free carrier, the free carrier of two kinds of polarity anode and negative electrode directional drift and form final photoelectric current output respectively under the effect of internal electric field.Yet exciton is on the contrary in the fractionation direction and the photoelectric current direction at anodic interface place.The photoelectric current direction of organic inside battery is that the electric charge of exciton at the donor-receiver interface splits direction, and promptly electronics is to cathode motion, the motion of hole anode.And exciton is seen Fig. 2 in the fractionation direction of anodic interface for the motion of electronics anode.So it is a negative factor that the exciton of anodic interface splits the electrical property of whole solar cell and electric current output.
The good effect that produces in the invention process process mainly shows: by adjusting the thickness of anode modification layer, makes when suppressing the anodic interface exciton and splitting, can the effective collection charge carrier, thus promoted the organic solar batteries energy conversion efficiency.
With insertion between anode and the photosensitive layer, effectively suppressed anode-split for the body interface exciton, its process operation is simple, control easily, effect is remarkable.
Description of drawings
Fig. 1, be structural representation of the present invention.
Fig. 2, be that heterojunction organic molecule solar cell interface exciton splits schematic diagram in the prior art.
Fig. 3, be that the heterojunction organic solar batteries interface exciton that the present invention has an anode modification layer splits schematic diagram.
Further specify the operation principle of the heterojunction solar battery based on organic molecule provided by the invention (hereinafter to be referred as battery or machine battery is arranged) below in conjunction with accompanying drawing:
See Fig. 1, have the heterojunction organic molecule solar cell of anode modification layer, form by transparent insulation substrate 1, transparency electrode 2, anode modification layer 3, first photosensitive layer 4, second photosensitive layer 5, resilient coating 6, high reflectance electrode 7.Above the transparent insulation substrate 1 transparency electrode 2, as the anode of solar cell; Be anode modification layer 3 above the transparency electrode 2, be used to suppress the exciton fractionation of anodic interface; Above the anode modification layer 3 first photosensitive layer 4, as electron donor; Being second photosensitive layer 5 above first photosensitive layer 4, as electron acceptor, and forming electron donors-be subjected to body interface 1. with first photosensitive layer 4, is the important area that produces photoelectric current; Above second photosensitive layer 5 is resilient coating 6, as exciton barrier-layer; High reflectance electrode 7 above the resilient coating 6 is as the negative electrode of battery.Be different from silica-based solar cell, have machine battery to absorb sunlight and at first produce the electron hole pair with certain binding force, i.e. exciton.Exciton externally is electric neutrality, and must carry out just can have the output of photoelectric current, photovoltage after the exciton fractionation.
The direction of arrow among Fig. 2 is represented electronics and hole travel direction respectively, exciton split this process except can occur in electron donor-be subjected to body interface 1., also can occur in anode-2. to body interface.2. anode induces the photoproduction exciton to split with the interface of giving body, arrow is represented the direction that this exciton at the interface splits respectively among the figure, anode is that anode obtains electronics with the result that the interface of giving body exciton 2. splits, and the hole is stayed in the donor material, 1. to locate to be that electron donor-be subjected to body interface exciton 1. splits direction on the contrary with heterojunction boundary, promptly the photoelectric current outbound course with whole solar cell is opposite, has hindered effective collection of photo-generated carrier.So it is that we are unwilling to see that the exciton of anode-2. locate for body interface splits, and also is a key factor that causes the organic solar batteries performance not high.
See Fig. 3, for improving carrier collection efficient, the semi-conducting material of selecting broad stopband, low mobility for use is as anode modification layer, for example SiO
2, material such as LiF, can think a kind of material of approximate insulator, exciton is effectively to split at the interface of insulating material and electrode.Among Fig. 3, the direction of arrow is represented electronics and hole travel direction respectively, the introducing of anode modification layer can suppress anode-to body interface 2. exciton split (not had the represented electronics of arrow to flow among the figure).1. exciton is efficiently split at heterojunction boundary, thereby makes photo-generated carrier effectively be collected by two electrodes.
Yet, because the relatively poor electric conductivity of anode modification layer,, be an infringement to the carrier collection and the carrier transport of whole solar cell if select improperly.So the thickness of anode modification layer is typically chosen in about 0.5-5nm, can not be too thick.The anode modification layer is inserted between anode and the electron donor layer, forms the triangle potential barrier, improves the collection efficiency of charge carrier by tunneling effect.Though, adopting tunneling effect to improve carrier collection efficient and in the OLED industry, be used already, photovoltaic devices such as introducing solar cell are still first.The present invention is by adjusting the thickness of anode modification layer, and creationary test makes when suppressing the fractionation of anodic interface exciton, effectively improves carrier collection efficient simultaneously, thereby promotes the organic solar batteries energy conversion efficiency.
Exciton splits the interface with being subjected to body interface 1. to provide efficiently to give body, is that double-deck heterojunction organic solar batteries carries out the key area that exciton splits the generation photoelectric current.The direction that its exciton splits be electronics by inject for body to acceptor, collected by negative electrode, the hole is collected by anode to injecting to body; In the photoelectric current direction of inside battery formation, be the power producer of whole organic solar batteries by the negative electrode anode.1. electron donor and electron acceptor interface are not limited to bilayer, can be three layers or more multi-layered heterojunction organic solar batteries.The exciton that the anode modification layer can suppress between anode-photosensitive layer splits, simultaneously by regulating anode modification layer thickness and tunneling effect, improve anode holoe carrier collection efficiency, and finally reach the purpose that promotes heterojunction organic molecule solar cell energy conversion efficiency.
The heterostructure of being made up of first photosensitive layer 4 and second photosensitive layer 5 is that whole solar cell absorbs the main region that sunlight produces photoelectric current, photovoltage, is the heterojunction structure that organic molecule electron donor material and electron acceptor material constitute.First photosensitive layer 4 is an electron donor material, as giving the body layer, can select hole mobile materials such as phthalocyanine dye, pentacene, porphyrin compound, cyanine dyes; Second photosensitive layer 5 is the electron acceptor material layer, is electron transport material or other inorganic nano materials such as PTCDA, C60, C70, Pe and derivative thereof, CdSe for example, CdS, CdTe, TiO2, ZnO, PbS, SnO2 etc., and carbon nano-tube, functional materials such as Graphene.
The preparation method and the step of the heterojunction organic molecule solar cell that has an anode modification provided by the invention are as follows:
With quartz glass, silicate glass, vagcor or other transparent insulation materials as the transparent insulation substrate 1 among Fig. 1, substrate as film growth, after ultrasonic cleaning, in the method for employing sputter of one side or vapour deposition, plating layer of metal oxide electroconductive film;
According to the demand of heterojunction organic molecule solar cell device preparation, with the delineation of metal conductive oxide membrane laser or corrode into needed stripe electrode pattern, as the transparency electrode among Fig. 12, it can be used as anode according to the device needs;
The transparent conducting glass that obtains is sent in the vacuum evaporation chamber by glove box, pretreatment chamber through after the ultrasonic cleaning;
Adopt the mode of vacuum evaporation, control deposit film thickness, growth anode modification layer 3 on transparency electrode 2 by control depositing temperature and sedimentation time;
Adopt the mode of the vacuum evaporation light-sensitive material of on anode modification layer 3, growing then, obtain first photosensitive layer 4 and second photosensitive layer 5, form heterostructure, produce the main region of photoelectric current as the solar cell absorbing light;
On second photosensitive layer 5, adopt the mode of vacuum evaporation, preparation resilient coating 6, and be aided with the corresponding electrode mask plate, growing and preparing metallic film stripe electrode, i.e. high reflectance electrode 7 among Fig. 1, according to the device needs, as the negative electrode of individual layer organic molecule solar cell.
Embodiment
Embodiment 1:
Fig. 1 is the structure chart of the embodiment of the invention 1, transparent insulation substrate 1 adopting quartz glass; Transparency electrode 2 adopts the FTO stripe electrode, and its square resistance is 20 ohm/; Anode modification layer 3 adopts the SiO2 earth silicon material; First photosensitive layer 4 adopts the CuPc phthalocyanine copper film; Second photosensitive layer 5 adopts the C60 film; Resilient coating 6 adopts organic material Alq3 film; High reflectance electrode 7 adopts Al aluminium membrane electrode.
Be prepared as follows:
The polishing quartz glass of selecting 1.1mm thickness for use adopts hyperacoustic method that quartz glass was cleaned 2-3 hour as transparent insulation substrate 1;
The method that adopts sputter is at the long one deck ITO of quartz glass one adnation conductive film, and as transparency electrode 2, ito thin film thickness is 100nm;
The ITO conductive photolithographic film is corroded into the anode of needed stripe electrode pattern as solar cell;
Entire I TO glass substrate passes through the scouring of absolute methanol, acetone, and cleans 1 hour in deionized water for ultrasonic, afterwards ito glass substrate is toasted 10 minutes in 130 degrees centigrade high temperature furnace;
Sample is taken out from high temperature furnace,, hide the SiO2 target by PVD sputter mode, the sputter of small size low rate, at ito anode superficial growth one deck SiO2 film, as anode modification layer 3, thickness is 4nm;
Adopt vacuum evaporation on the SiO2 film, growth CuPc phthalocyanine copper film is as first photosensitive layer 4, and its thickness is 20nm, and growth rate is 0.01nm/s;
On the CuPc film, adopt vacuum evaporation growth C60 film as second photosensitive layer 5, its thickness is 60nm, growth rate is 0.03nm/s;
On the C60 film, adopt vacuum evaporation growth Alq3 film as resilient coating 6, its thickness is 6nm, growth rate is 0.01nm/s;
On the Alq3 film, be aided with striped mask plate vacuum evaporation 100nm thickness A l aluminum strip line electrode as high reflectance electrode 1, the negative electrode of solar cell, growth rate is 0.11nm/s.So far, the heterojunction that has the anode modification layer among the present invention is finished in preparation, and is micromolecular, organic solar batteries.
Embodiment 2:
See Fig. 1, transparent insulation substrate 1 adopting quartz glass; Transparency electrode 2 adopts the ITO stripe electrode, and its square resistance is 15 ohm/; Anode modification layer 3 adopts LiF lithium fluoride material; First photosensitive layer 4 adopts the CuPc phthalocyanine copper film; Second photosensitive layer 5 adopts the C60 film; Resilient coating 6 adopts organic material Alq3 film; High reflectance electrode 7 adopts Al aluminium membrane electrode.
Be prepared as follows:
The polishing quartz glass of selecting 1.5mm thickness for use adopts hyperacoustic method that quartz glass was cleaned 3 hours as transparent insulation substrate 1;
The method that adopts sputter is at the long one deck ITO of quartz glass one adnation conductive film, as transparency electrode 2.Ito thin film thickness is 120nm;
The ITO conductive photolithographic film is lost into the anode 2 of needed stripe electrode pattern as solar cell;
Entire I TO glass substrate passes through the scouring of absolute methanol, acetone, and cleans 1.5 hours in deionized water for ultrasonic, afterwards ito glass substrate is toasted 15 minutes in 150 degrees centigrade high temperature furnace;
Sample is taken out from high temperature furnace, send in the growth chamber of vacuum evaporation system, its vacuum degree is 10
-8-10
-7Torr adopts the mode of vacuum evaporation to grow LiF lithium fluoride film as anode modification layer 3, and its thickness is 1nm, and growth rate is 0.02nm/s;
Adopt the mode of vacuum evaporation to grow the CuPc phthalocyanine copper film as first photosensitive layer 4 on LiF lithium fluoride film, its thickness is 50nm, and growth rate is 0.05nm/s;
On the CuPc film, adopt the mode of vacuum evaporation to grow the C60 film as second photosensitive layer 5, its thickness is 100nm, growth rate is 0.06nm/s;
On the C60 film, adopt the mode of vacuum evaporation to grow the Alq3 film as resilient coating 6, its thickness is 10nm, growth rate is 0.03nm/s;
On the Alq3 film, be aided with striped mask plate vacuum evaporation 120nm thickness A l aluminum strip line electrode 7 negative electrodes as high reflectance electrode 1 and solar cell, growth rate is 0.15nm/s.So far, the heterojunction organic molecule solar cell that has anode modification among the present invention is finished in preparation.
Embodiment 3:
As Fig. 1, transparent insulation substrate 1 adopting quartz glass; Transparency electrode 2 adopts the ITO stripe electrode, and its square resistance is 17 ohm/; Anode modification layer 3 adopts the TiOx material; First photosensitive layer 4 adopts pentacene thin film; Second photosensitive layer 5 adopts the C60 film; Resilient coating 6 adopts organic material BCP film; High reflectance electrode 7 adopts Ag silver membrane electrode.
Be prepared as follows:
The polishing quartz glass of selecting 3.2mm thickness for use adopts hyperacoustic method that quartz glass was cleaned 4 hours as transparent insulation substrate 1;
The method that adopts sputter is at the long one deck ITO of quartz glass one adnation conductive film, as transparency electrode 2.Ito thin film thickness is 150nm;
The ITO conductive photolithographic film is lost into the anode of needed stripe electrode pattern as solar cell;
Entire I TO glass substrate passes through the scouring of absolute methanol, acetone, and cleans 2 hours in deionized water for ultrasonic, afterwards ito glass substrate is toasted 10 minutes in 170 degrees centigrade high temperature furnace;
Adopt 10 milliliters of titanium tetraisopropylates (Ti[OCH (CH3) 2] 4,99.999%), 50 milliliters of 2-methyl cellosolve (CH3OCH2CH2OH, 99.9%), 5 milliliters of monoethanolamines (H2NCH2CH2OH, 99%) are as raw material, be mixed with into the precursor solution of TiOx, and be heated to 80 degree, stirred 2 hours; Be heated to 120 degree once more, stirred 1 hour;
The ITO sample is taken out from high temperature furnace, adopt the TiOx precursor solution prepare,, the ITO sample placed carry out spin coating on the sol evenning machine and prepare the TiOx film by the mode of spin coating.The spin coating rotating speed is 6000RPM.The sample that obtains is spent heat 20 minutes Celsius 110, obtains the TiOx film by hydrolytic process, and thickness is 3nm, as anode modification layer 3;
Sample is sent in the growth chamber of vacuum evaporation system, its vacuum degree is 10
-8-10
-7Torr adopts the mode of vacuum evaporation to grow pentacene thin film as first photosensitive layer 4 on the TiOx film, and its thickness is 60nm, and growth rate is 0.05nm/s;
On pentacene thin film, adopt the mode of vacuum evaporation to grow the C60 film as second photosensitive layer 5, its thickness is 120nm, growth rate is 0.06nm/s;
On the C60 film, adopt the mode of vacuum evaporation to grow the BCP film as resilient coating 6, its thickness is 12nm, growth rate is 0.02nm/s;
On the BCP film, be aided with the negative electrode of striped mask plate vacuum evaporation 150nm thickness A l aluminum strip line electrode as high reflectance electrode 1 and solar cell, growth rate is 0.15nm/s.Preparation is finished.
Key technology among the present invention is to adopt anode modification layer antianode-organic photosensitive bed boundary to modify, suppress the fractionation of exciton in anodic interface, control the thickness of anode modification layer simultaneously, improve anode carrier collection efficient by tunneling effect, thereby can finally improve the energy conversion efficiency of heterojunction organic molecule solar cell.
Claims (12)
1. organic solar batteries, heterojunction based on organic molecule, constitute by the transparent insulation substrate that stacks gradually, transparency electrode, electron donor-acceptor, resilient coating, high reflectance electrode, it is characterized in that having above the transparency electrode one to be used to suppress the anode modification layer that the anodic interface exciton splits; This forms heterojunction structure by the photosensitive layer of electron donor and electron acceptor above anode modification layer, is the important area that produces photoelectric current.
2. a kind of organic solar batteries according to claim 1 is characterized in that being inserted in the about 0.5-5nm of thickness of anode modification layer between anode and the electron donor layer, forms the triangle potential barrier, improves the collection efficiency of charge carrier by tunneling effect.
3. a kind of organic solar batteries according to claim 1, the interface (1.) that it is characterized in that electron donor-acceptor has two photosensitive layers at least, as above the anode modification layer of electron donor being that first photosensitive layer and second photosensitive layer on it constitute the organic molecule heterojunction.
4. a kind of organic solar batteries according to claim 3 is characterized in that said second photosensitive layer is to be deposited on above first photosensitive layer of electron donor as electron acceptor.
5. a kind of organic solar batteries according to claim 1 is characterized in that said anode modification layer comprises silicon dioxide (SiO
2), lithium fluoride (LiF), titanium dioxide (TiO
2) in interior broad stopband, low carrier mobility thin-film material.
6. a kind of organic solar batteries according to claim 1 is characterized in that said anode modification layer is to be deposited on the anode that comprises by transparent oxide, metallic film or carbon nanotube conductive thin film.
7. a kind of organic solar batteries according to claim 3 is characterized in that the first photosensitive layer series electron donor material above the anode modification layer, comprises the hole mobile material of phthalocyanine dye, pentacene, porphyrin compound, cyanine dyes; Also comprise the electron acceptor material on second photosensitive layer.
8. according to claim 7 organic solar batteries, it is characterized in that electron acceptor on second photosensitive layer also comprises the derivative electron transport material or the inorganic nano material PEDOT:PSS of the macromolecule aqueous polymer that a kind of conductance is very high.
9. the organic solar batteries preparation method based on the heterojunction of organic molecule cleans the transparent insulation glass substrate; Sputter or vapour deposition conductive film; Laser grooving and scribing or corroding electrode figure sample are transparent anode;
It is characterized in that
The preparation method of anode decorative layer on the transparency electrode: comprise
Adopt the vacuum evaporation anode modification layer of on transparency electrode, grow, also comprise the film thickness that the control by temperature, time deposits;
Adopt the vacuum evaporation light-sensitive material of on the anode modification layer, growing, produce the main region of photoelectric current as the solar cell absorbing light.
10. the organic solar batteries preparation method of a kind of heterojunction based on organic molecule according to claim 9, it is characterized in that adopting the vacuum evaporation photosensitive layer of on the anode modification layer, growing, at least twice plated film obtains compound photosensitive layer, forms heterostructure.
11. the organic solar batteries preparation method of a kind of heterojunction based on organic molecule according to claim 9 is characterized in that growth anode modification layer on transparency electrode, the about 0.5-5nm of film thickness of control deposition.
12. the organic solar batteries preparation method of a kind of heterojunction based on organic molecule according to claim 9, it is characterized in that adopting at least two photosensitive layers of vacuum evaporation, as being first photosensitive layer above the anode modification layer of electron donor, form the organic molecule heterojunction with second photosensitive layer on it.
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| WO2015196794A1 (en) * | 2014-06-27 | 2015-12-30 | 华为技术有限公司 | Organic solar battery and preparation method therefor |
| CN105529345A (en) * | 2016-01-29 | 2016-04-27 | 中国计量学院 | Organic near-infrared light upconverter taking dual-heterojunction as photosensitive layer |
| CN107579123A (en) * | 2017-08-31 | 2018-01-12 | 华中科技大学 | A kind of antimony selenide thin-film solar cells and preparation method thereof |
| CN108075003A (en) * | 2016-11-11 | 2018-05-25 | 国家纳米科学中心 | Spin photovoltaic device and preparation method thereof |
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| CN111171625A (en) * | 2020-01-06 | 2020-05-19 | 上海大学 | Rapid preparation method of ink, preparation method of thin film and preparation method of oxide thin film transistor |
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