JP7265892B2 - 量子ドット及びこれを含む電界発光素子 - Google Patents
量子ドット及びこれを含む電界発光素子 Download PDFInfo
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- JP7265892B2 JP7265892B2 JP2019043481A JP2019043481A JP7265892B2 JP 7265892 B2 JP7265892 B2 JP 7265892B2 JP 2019043481 A JP2019043481 A JP 2019043481A JP 2019043481 A JP2019043481 A JP 2019043481A JP 7265892 B2 JP7265892 B2 JP 7265892B2
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- ORFSSYGWXNGVFB-UHFFFAOYSA-N sodium 4-amino-6-[[4-[4-[(8-amino-1-hydroxy-5,7-disulfonaphthalen-2-yl)diazenyl]-3-methoxyphenyl]-2-methoxyphenyl]diazenyl]-5-hydroxynaphthalene-1,3-disulfonic acid Chemical compound COC1=C(C=CC(=C1)C2=CC(=C(C=C2)N=NC3=C(C4=C(C=C3)C(=CC(=C4N)S(=O)(=O)O)S(=O)(=O)O)O)OC)N=NC5=C(C6=C(C=C5)C(=CC(=C6N)S(=O)(=O)O)S(=O)(=O)O)O.[Na+] ORFSSYGWXNGVFB-UHFFFAOYSA-N 0.000 description 1
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- 238000001228 spectrum Methods 0.000 description 1
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- 150000003512 tertiary amines Chemical class 0.000 description 1
- JZALLXAUNPOCEU-UHFFFAOYSA-N tetradecylbenzene Chemical compound CCCCCCCCCCCCCCC1=CC=CC=C1 JZALLXAUNPOCEU-UHFFFAOYSA-N 0.000 description 1
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
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- VNDYJBBGRKZCSX-UHFFFAOYSA-L zinc bromide Chemical compound Br[Zn]Br VNDYJBBGRKZCSX-UHFFFAOYSA-L 0.000 description 1
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- GTLDTDOJJJZVBW-UHFFFAOYSA-N zinc cyanide Chemical compound [Zn+2].N#[C-].N#[C-] GTLDTDOJJJZVBW-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
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
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- RXBXBWBHKPGHIB-UHFFFAOYSA-L zinc;diperchlorate Chemical compound [Zn+2].[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O RXBXBWBHKPGHIB-UHFFFAOYSA-L 0.000 description 1
- NHXVNEDMKGDNPR-UHFFFAOYSA-N zinc;pentane-2,4-dione Chemical compound [Zn+2].CC(=O)[CH-]C(C)=O.CC(=O)[CH-]C(C)=O NHXVNEDMKGDNPR-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
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Description
前記量子ドットは、10nm以上の粒子の大きさを有し得る。
前記量子ドットは、セレニウムに対するテルリウムのモル比が0.05以下であり得る。
前記量子ドットは、セレニウムに対する硫黄のモル比が2.0以下であり得る。
前記量子ドットは、セレニウムに対する硫黄のモル比が1.85以下であり得る。
前記量子ドットは、セレニウムに対する硫黄のモル比が1.85未満であり得る。
前記量子ドットは、セレニウムに対する硫黄のモル比が1.8以下であり得る。
前記コアの大きさは、2nm以上であり得る。
前記コアは、ZnTexSe1-x(ここで、xは0よりも大きく0.05以下である)を含み得る。
前記半導体ナノ結晶シェルは、前記コアから半径方向に変化する組成を有し得る。
前記半導体ナノ結晶シェルは、硫黄の含有量が前記量子ドットの表面に向かって増加し得る。
前記半導体ナノ結晶シェルは、前記コアの真上に配置された第1層及び前記第1層上に配置された第2層を含み得る。前記第1層は、第2半導体ナノ結晶を含み得る。前記第2層は、前記第2半導体ナノ結晶と異なる組成を有する第3半導体ナノ結晶を含み得る。
前記第2半導体ナノ結晶は、亜鉛、セレニウム、及び選択に応じて硫黄を含み得る。前記第3半導体ナノ結晶は、亜鉛及び硫黄を含み得る。
前記第2層は最外殻層であり、前記第3半導体ナノ結晶はセレニウムを含まなくてもよい。
前記量子ドットの光発光ピーク波長は、445nmよりも大きくあり得る。
前記量子ドットの光発光ピーク波長は、470nm以下であり得る。
前記量子ドットは、量子効率が70%以上であり得る。
前記量子ドットの光発光ピークの半値幅は、30nm以下であり得る。
前記量子ドットの粒子の大きさは、12nm以上であり得る。
前記電荷補助層は、電荷輸送層、電荷注入層、又はこれらの組み合わせを含み得る。
前記電界発光素子は、最大外部量子効率(peak external quantum efficiency)が4%以上であり得る。
前記電界発光素子は、CIE色座標のx値が0.2以下の光を放出し得る。
前記電子素子は、表示装置、発光ダイオード(LED)、量子ドット発光ダイオード(QLED)、有機発光ダイオード(OLED)、センサー(Sensor)、イメージセンサー、又は太陽電池電子素子であり得る。
2、20 正孔補助層
3、30 (量子ドット)発光層
4、40 電子補助層
5、50 カソード
100 透明基板
Claims (22)
- 亜鉛、セレニウム、及びテルリウムを含む第1半導体ナノ結晶を含むコア並びに前記コア上に配置されて亜鉛、セレニウム、及び硫黄を含む半導体ナノ結晶シェルを有する量子ドットであって、
前記量子ドットは、カドミウムを含まず、
前記量子ドットは、セレニウムに対する硫黄のモル比が2.4以下であることを特徴とする量子ドット。 - 前記量子ドットは、430nm以上480nm以下の範囲で最大光発光ピーク波長を有することを特徴とする請求項1に記載の量子ドット。
- 前記量子ドットは、粒子の大きさが10nm以上であることを特徴とする請求項1に記載の量子ドット。
- 前記量子ドットは、セレニウムに対するテルリウムのモル比が0.05以下であることを特徴とする請求項1に記載の量子ドット。
- 前記量子ドットは、セレニウムに対する硫黄のモル比が2.0以下であることを特徴とする請求項1に記載の量子ドット。
- 前記量子ドットは、セレニウムに対する硫黄のモル比が1.85以下であることを特徴とする請求項1に記載の量子ドット。
- 前記コアの大きさは、2nm以上であることを特徴とする請求項1に記載の量子ドット。
- 前記コアは、ZnTexSe1-x(ここで、xは0よりも大きく0.05以下である)を含むことを特徴とする請求項1に記載の量子ドット。
- 前記半導体ナノ結晶シェルは、前記コアから半径方向に変化する組成を有することを特徴とする請求項1に記載の量子ドット。
- 前記半導体ナノ結晶シェルは、硫黄の含有量が前記量子ドットの表面に向かって増加することを特徴とする請求項9に記載の量子ドット。
- 前記半導体ナノ結晶シェルは、前記コアの真上に配置された第1層及び前記第1層上に配置された第2層を含み、
前記第1層は、第2半導体ナノ結晶を含み、
前記第2層は、前記第2半導体ナノ結晶と異なる組成を有する第3半導体ナノ結晶を含むことを特徴とする請求項1に記載の量子ドット。 - 前記第2半導体ナノ結晶は、亜鉛、セレニウム、及び選択に応じて硫黄を含み、
前記第3半導体ナノ結晶は、亜鉛及び硫黄を含むことを特徴とする請求項11に記載の量子ドット。 - 前記第2層は、最外殻層であり、
前記第3半導体ナノ結晶は、セレニウムを含まないことを特徴とする請求項11に記載の量子ドット。 - 前記量子ドットの光発光ピーク波長は、445nmよりも大きく470nm以下であることを特徴とする請求項1に記載の量子ドット。
- 量子効率は、70%以上であることを特徴とする請求項1に記載の量子ドット。
- 前記量子ドットの最大光発光ピークの半値幅は、30nm以下であることを特徴とする請求項1に記載の量子ドット。
- 前記量子ドットの粒子の大きさは、12nm以上であることを特徴とする請求項1に記載の量子ドット。
- 互いに向かい合う第1電極及び第2電極と、
前記第1電極と前記第2電極との間に位置して複数の量子ドットを含む量子ドット発光層と、を有し、
前記複数の量子ドットは、請求項1に記載の量子ドットを含むことを特徴とする電界発光素子。 - 前記第1電極と前記量子ドット発光層との間、前記第2電極と前記量子ドット発光層との間、又は前記第1電極と前記量子ドット発光層との間及び前記第2電極と前記量子ドット発光層との間に電荷補助層を含むことを特徴とする請求項18に記載の電界発光素子。
- 前記電荷補助層は、電荷輸送層、電荷注入層、又はこれらの組み合わせを含むことを特徴とする請求項19に記載の電界発光素子。
- 前記電界発光素子は、最大外部量子効率(peak external quantum efficiency)が4%以上であることを特徴とする請求項18に記載の電界発光素子。
- 前記電界発光素子は、CIE色座標のx値が0.2以下の光を放出することを特徴とする請求項18に記載の発光素子。
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US11591518B2 (en) | 2023-02-28 |
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CN110240896A (zh) | 2019-09-17 |
EP3536762B1 (en) | 2021-05-05 |
EP3536762A1 (en) | 2019-09-11 |
KR20190106823A (ko) | 2019-09-18 |
CN110240896B (zh) | 2024-03-05 |
US10954440B2 (en) | 2021-03-23 |
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