JP4292162B2 - エレクトロルミネッセンス素子 - Google Patents
エレクトロルミネッセンス素子 Download PDFInfo
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- JP4292162B2 JP4292162B2 JP2005018771A JP2005018771A JP4292162B2 JP 4292162 B2 JP4292162 B2 JP 4292162B2 JP 2005018771 A JP2005018771 A JP 2005018771A JP 2005018771 A JP2005018771 A JP 2005018771A JP 4292162 B2 JP4292162 B2 JP 4292162B2
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- Prior art keywords
- component
- layer
- charge carrier
- light emitting
- carrier injection
- Prior art date
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- Expired - Lifetime
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- 239000004065 semiconductor Substances 0.000 claims description 31
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 17
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- 239000000243 solution Substances 0.000 claims description 13
- 238000004020 luminiscence type Methods 0.000 claims description 11
- 229920000547 conjugated polymer Polymers 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000000151 deposition Methods 0.000 claims description 6
- 125000003277 amino group Chemical group 0.000 claims description 3
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- 238000000295 emission spectrum Methods 0.000 description 7
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- RXACYPFGPNTUNV-UHFFFAOYSA-N 9,9-dioctylfluorene Chemical compound C1=CC=C2C(CCCCCCCC)(CCCCCCCC)C3=CC=CC=C3C2=C1 RXACYPFGPNTUNV-UHFFFAOYSA-N 0.000 description 2
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- 229920005605 branched copolymer Polymers 0.000 description 2
- QARVLSVVCXYDNA-UHFFFAOYSA-N bromobenzene Chemical compound BrC1=CC=CC=C1 QARVLSVVCXYDNA-UHFFFAOYSA-N 0.000 description 2
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- UHXOHPVVEHBKKT-UHFFFAOYSA-N 1-(2,2-diphenylethenyl)-4-[4-(2,2-diphenylethenyl)phenyl]benzene Chemical compound C=1C=C(C=2C=CC(C=C(C=3C=CC=CC=3)C=3C=CC=CC=3)=CC=2)C=CC=1C=C(C=1C=CC=CC=1)C1=CC=CC=C1 UHXOHPVVEHBKKT-UHFFFAOYSA-N 0.000 description 1
- RTZLUCKTESKFRR-UHFFFAOYSA-N 2,7-dibromo-3h-1,2,3-benzothiadiazole Chemical compound C1=CC(Br)=C2SN(Br)NC2=C1 RTZLUCKTESKFRR-UHFFFAOYSA-N 0.000 description 1
- CYKLQIOPIMZZBZ-UHFFFAOYSA-N 2,7-dibromo-9,9-dioctylfluorene Chemical compound C1=C(Br)C=C2C(CCCCCCCC)(CCCCCCCC)C3=CC(Br)=CC=C3C2=C1 CYKLQIOPIMZZBZ-UHFFFAOYSA-N 0.000 description 1
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- 229910052791 calcium Inorganic materials 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 125000004093 cyano group Chemical group *C#N 0.000 description 1
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- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- TUJWIYZCAPMHSA-UHFFFAOYSA-N dipentylphosphoryloxybenzene Chemical compound CCCCCP(=O)(CCCCC)OC1=CC=CC=C1 TUJWIYZCAPMHSA-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
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- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 230000005524 hole trap Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
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- 230000003647 oxidation Effects 0.000 description 1
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- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000006069 physical mixture Substances 0.000 description 1
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- 229910052700 potassium Inorganic materials 0.000 description 1
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- 238000001429 visible spectrum Methods 0.000 description 1
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- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
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- H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
- H10K85/115—Polyfluorene; Derivatives thereof
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- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
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- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/30—Monomer units or repeat units incorporating structural elements in the main chain
- C08G2261/31—Monomer units or repeat units incorporating structural elements in the main chain incorporating aromatic structural elements in the main chain
- C08G2261/314—Condensed aromatic systems, e.g. perylene, anthracene or pyrene
- C08G2261/3142—Condensed aromatic systems, e.g. perylene, anthracene or pyrene fluorene-based, e.g. fluorene, indenofluorene, or spirobifluorene
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- C08G2261/30—Monomer units or repeat units incorporating structural elements in the main chain
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- C08G2261/324—Monomer units or repeat units incorporating structural elements in the main chain incorporating heteroaromatic structural elements in the main chain condensed
- C08G2261/3246—Monomer units or repeat units incorporating structural elements in the main chain incorporating heteroaromatic structural elements in the main chain condensed containing nitrogen and sulfur as heteroatoms
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- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/02—Polyamines
- C08G73/026—Wholly aromatic polyamines
- C08G73/0266—Polyanilines or derivatives thereof
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- C09K2211/14—Macromolecular compounds
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- C09K2211/1433—Carbocyclic compounds bridged by heteroatoms, e.g. N, P, Si or B
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- H10K2101/40—Interrelation of parameters between multiple constituent active layers or sublayers, e.g. HOMO values in adjacent layers
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- H10K2101/90—Multiple hosts in the emissive layer
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- H10K50/14—Carrier transporting layers
- H10K50/15—Hole transporting layers
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
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- 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
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- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10S428/917—Electroluminescent
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- Organic Chemistry (AREA)
- Electroluminescent Light Sources (AREA)
Description
1.ホール(Hall)ら(上記参照)の方法を用いて測定したフォトルミネッセンス(PL)効率
2.ホール(Hall)らの方法に基づく改良法を用いての測定
3.以下に説明する図25の考察を参照
3…発光層 5…LUMOエネルギ準位
6…HOMOエネルギ準位
Claims (23)
- 正電荷キャリアを注入するための第1電荷キャリア注入層と、
負電荷キャリアを注入するための第2電荷キャリア注入層と、
第1電荷キャリア注入層と第2電荷キャリア注入層の間に位置するとともに、第1電荷キャリア注入層から正電荷キャリアを受け取る第1成分と、第2電荷キャリア注入層から負電荷キャリアを受け取る第2成分と、第1および第2成分からの電荷キャリアが結合することにより光を発生する有機発光成分である第3成分とを含有する発光層と、
を備え、
第1成分、第2成分および第3成分が同一分子に結合し、
第1成分、第2成分および第3成分の少なくとも1つが他の第1、第2および第3成分とタイプIIの半導体界面を形成することを特徴とするエレクトロルミネッセンス素子。 - 請求項1記載のエレクトロルミネッセンス素子において、第1成分、第2成分および第3成分が同一高分子に結合していることを特徴とするエレクトロルミネッセンス素子。
- 請求項2記載のエレクトロルミネッセンス素子において、高分子が共役高分子であることを特徴とするエレクトロルミネッセンス素子。
- 請求項2または3記載のエレクトロルミネッセンス素子において、第3成分が第1成分および/または第2成分の高分子鎖のペンダント基として供されることを特徴とするエレクトロルミネッセンス素子。
- 請求項2または3記載のエレクトロルミネッセンス素子において、第1成分および/または第2成分が第3成分の高分子鎖の1以上のペンダント基として供されることを特徴とするエレクトロルミネッセンス素子。
- 請求項1〜5のいずれか1項に記載のエレクトロルミネッセンス素子において、第1成分、第2成分および第3成分のすべてが他の第1、第2および第3成分とタイプIIの半導体界面を形成することを特徴とするエレクトロルミネッセンス素子。
- 請求項1〜6のいずれか1項に記載のエレクトロルミネッセンス素子において、第3成分の光学ギャップが1.8eVより大きいことを特徴とするエレクトロルミネッセンス素子。
- 請求項1〜7のいずれか1項に記載のエレクトロルミネッセンス素子において、第1成分は、第1電荷キャリア注入層から正電荷キャリアを受け取ることが可能であり、かつアミン基を含有することを特徴とするエレクトロルミネッセンス素子。
- 請求項1〜8のいずれか1項に記載のエレクトロルミネッセンス素子において、第2成分がF8であることを特徴とするエレクトロルミネッセンス素子。
- 請求項1〜9のいずれか1項に記載のエレクトロルミネッセンス素子において、第1成分は、第2成分および第3成分の各LUMOエネルギ準位の間にLUMOエネルギ準位を有することを特徴とするエレクトロルミネッセンス素子。
- 請求項1〜9のいずれか1項に記載のエレクトロルミネッセンス素子において、第3成分の光学ギャップが第1成分および第2成分の光学ギャップに比して小さいことを特徴とするエレクトロルミネッセンス素子。
- 請求項1〜9、11のいずれか1項に記載のエレクトロルミネッセンス素子において、第3成分がF8BTまたは可溶性PPVであることを特徴とするエレクトロルミネッセンス素子。
- 請求項1〜12のいずれか1項に記載のエレクトロルミネッセンス素子において、第1電荷キャリア注入層は、発光層と陽極層との間に位置する正電荷キャリア輸送層であることを特徴とするエレクトロルミネッセンス素子。
- 請求項13記載のエレクトロルミネッセンス素子において、第1電荷キャリア注入層が発光層とタイプIIの半導体界面を形成することを特徴とするエレクトロルミネッセンス素子。
- 請求項1〜12のいずれか1項に記載のエレクトロルミネッセンス素子において、第1電荷キャリア注入層は、陽極層であることを特徴とするエレクトロルミネッセンス素子。
- 請求項13〜15のいずれか1項に記載のエレクトロルミネッセンス素子において、陽極層が4.3eVより大きな仕事関数を有することを特徴とするエレクトロルミネッセンス素子。
- 請求項1〜16のいずれか1項に記載のエレクトロルミネッセンス素子において、第2電荷キャリア注入層は、発光層と陰極層との間に位置する負電荷キャリア輸送層であることを特徴とするエレクトロルミネッセンス素子。
- 請求項17記載のエレクトロルミネッセンス素子において、第2電荷キャリア注入層が発光層とタイプIIの半導体界面を形成することを特徴とするエレクトロルミネッセンス素子。
- 請求項1〜16のいずれか1項に記載のエレクトロルミネッセンス素子において、第2電荷キャリア注入層が陰極層であることを特徴とするエレクトロルミネッセンス素子。
- 請求項17〜19のいずれか1項に記載のエレクトロルミネッセンス素子において、陰極層が3.5eV未満の仕事関数を有することを特徴とするエレクトロルミネッセンス素子。
- 請求項13〜20のいずれか1項に記載のエレクトロルミネッセンス素子において、電極層または少なくとも一方の電極層が光透過性であることを特徴とするエレクトロルミネッセンス素子。
- 請求項1〜21のいずれか1項に記載されたエレクトロルミネッセンス素子を製造する方法であって、
第1の極性の電荷キャリアを注入するための第1電荷キャリア注入層を成膜する工程と、
第1電荷キャリア注入層から第1の極性の電荷キャリアを受け取る第1成分と、第2電荷キャリア注入層から反対極性の電荷キャリアを受け取る第2成分と、第1成分および第2成分からの電荷キャリアが結合することにより光を発生する第3成分である有機発光成分とが結合し、且つ第1、第2および第3成分の少なくとも1つが他の第1、第2および第3成分とタイプIIの半導体界面を形成する分子を含有する発光層を第1電荷キャリア注入層上に成膜する工程と、
第1電荷キャリア注入層に注入される電荷キャリアとは反対極性の電荷キャリアを注入するための第2電荷キャリア注入層を発光層上に成膜する工程と、
を有することを特徴とするエレクトロルミネッセンス素子の製造方法。 - 請求項22記載の製造方法において、発光層が溶液から成膜されることを特徴とするエレクトロルミネッセンス素子の製造方法。
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