KR102607451B1 - 발광 소자 및 이를 포함하는 표시 장치 - Google Patents
발광 소자 및 이를 포함하는 표시 장치 Download PDFInfo
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- KR102607451B1 KR102607451B1 KR1020160031087A KR20160031087A KR102607451B1 KR 102607451 B1 KR102607451 B1 KR 102607451B1 KR 1020160031087 A KR1020160031087 A KR 1020160031087A KR 20160031087 A KR20160031087 A KR 20160031087A KR 102607451 B1 KR102607451 B1 KR 102607451B1
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- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 29
- 239000002096 quantum dot Substances 0.000 claims abstract description 28
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 24
- 229910052711 selenium Inorganic materials 0.000 claims abstract description 16
- 229910052714 tellurium Inorganic materials 0.000 claims abstract description 15
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 9
- 230000005525 hole transport Effects 0.000 claims description 50
- 239000002019 doping agent Substances 0.000 claims description 25
- 238000004770 highest occupied molecular orbital Methods 0.000 claims description 24
- 150000001875 compounds Chemical class 0.000 claims description 21
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 claims description 18
- 229910007709 ZnTe Inorganic materials 0.000 claims description 16
- 239000010409 thin film Substances 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 claims description 8
- 229910052736 halogen Inorganic materials 0.000 claims description 7
- 150000002367 halogens Chemical class 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- 239000010410 layer Substances 0.000 description 134
- 239000011777 magnesium Substances 0.000 description 44
- 239000011701 zinc Substances 0.000 description 28
- 239000010408 film Substances 0.000 description 23
- 239000004065 semiconductor Substances 0.000 description 11
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 11
- 238000005538 encapsulation Methods 0.000 description 9
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000013078 crystal Substances 0.000 description 7
- 239000011787 zinc oxide Substances 0.000 description 7
- 239000011229 interlayer Substances 0.000 description 6
- 229910052984 zinc sulfide Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910017680 MgTe Inorganic materials 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- JAONJTDQXUSBGG-UHFFFAOYSA-N dialuminum;dizinc;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Al+3].[Zn+2].[Zn+2] JAONJTDQXUSBGG-UHFFFAOYSA-N 0.000 description 4
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 229910004613 CdTe Inorganic materials 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229920000144 PEDOT:PSS Polymers 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910052769 Ytterbium Inorganic materials 0.000 description 2
- RLWNPPOLRLYUAH-UHFFFAOYSA-N [O-2].[In+3].[Cu+2] Chemical compound [O-2].[In+3].[Cu+2] RLWNPPOLRLYUAH-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 229920001940 conductive polymer Polymers 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- VODBHXZOIQDDST-UHFFFAOYSA-N copper zinc oxygen(2-) Chemical compound [O--].[O--].[Cu++].[Zn++] VODBHXZOIQDDST-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
- 229910021389 graphene Inorganic materials 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 239000003446 ligand Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- KYKLWYKWCAYAJY-UHFFFAOYSA-N oxotin;zinc Chemical compound [Zn].[Sn]=O KYKLWYKWCAYAJY-UHFFFAOYSA-N 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 229910001887 tin oxide Inorganic materials 0.000 description 2
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 2
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 2
- -1 (Al) Chemical class 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002121 nanofiber Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000002055 nanoplate Substances 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 239000002070 nanowire Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- WGPCGCOKHWGKJJ-UHFFFAOYSA-N sulfanylidenezinc Chemical group [Zn]=S WGPCGCOKHWGKJJ-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
도 2는 본 발명의 일 실시예에 따른 표시 장치를 나타내는 단면도이다.
도 3 및 도 4는 본 발명의 일 실시예에 따른 발광 소자의 각 층의 에너지 준위를 보여주는 개략도이다.
130: 박막 트랜지스터
160: 제1 전극
172: 정공 수송층
173: 발광층
174: 전자 수송층
180: 제2 전극
Claims (19)
- 제1 전극,
상기 제1 전극과 중첩하는 제2 전극, 및
상기 제1 전극 및 상기 제2 전극 사이에 위치하며 양자점을 포함하는 발광층, 및
상기 제1 전극과 상기 발광층 사이에 위치하는 정공 수송층을 포함하고,
상기 양자점은 Zn, Te, Se 및 S로부터 선택된 적어도 2 종을 포함하는 코어, 및 Mg 및 Te를 포함하는 쉘을 포함하고,
상기 쉘의 LUMO 에너지 준위는 상기 코어의 LUMO 에너지 준위보다 크고, 상기 쉘의 HOMO 에너지 준위는 상기 코어의 HOMO 에너지 준위보다 작으며,
상기 정공 수송층의 HOMO 에너지 준위는 상기 코어의 HOMO 에너지 준위와 유사한 에너지 준위를 가지는 발광 소자. - 제1항에서,
상기 코어는 ZnSe, ZnS, 및 ZnTe 중 적어도 하나를 포함하는 발광 소자. - 삭제
- 제1항에서,
상기 정공 수송층은 p타입의 도펀트를 화합물을 포함하는 발광 소자. - 제4항에서,
상기 정공 수송층은 p-CuI, p-TlI, p-AgI, p-CdI2, p-HgI2, p-SnI2, p-PbI2, p-BiI3, p-ZnI2, p-MnI2, p-FeI2, p-CoI2, p-NiI2, p-AlI3, p-In2S3, p-Cu2S, p-Ag2S, p-ZnO, p-ZnTe, p-ZnSe 및 p-ZnS 중 적어도 하나를 포함하는 발광 소자. - 제4항에서,
상기 p타입 도펀트는 금속 및 할로겐 원소 중 적어도 하나를 포함하는 발광 소자. - 제4항에서,
상기 정공 수송층은,
상기 코어와 동일한 화합물 및 p타입 도펀트를 더 포함하는 화합물을 포함하는 발광 소자. - 제1항에서,
상기 발광층 및 상기 제2 전극 사이에 위치하는 전자 수송층을 더 포함하는 발광 소자. - 제8항에서,
상기 전자 수송층은 n타입의 도펀트를 포함하는 I-VI족 화합물, n타입의 도펀트를 포함하는 II-VI족 화합물 및 n타입의 도펀트를 포함하는 III-VI족 화합물로부터 선택된 적어도 하나를 포함하는 발광 소자. - 제1 전극,
상기 제1 전극과 중첩하는 제2 전극,
상기 제1 전극 및 상기 제2 전극 사이에 위치하며 양자점을 포함하는 발광층, 및
상기 제1 전극과 상기 발광층 사이에 위치하는 정공 수송층을 포함하고,
상기 양자점은
Zn 및 Te를 포함하는 코어, 및
Mg 및 Te를 포함하는 쉘을 포함하고,
상기 쉘의 LUMO 에너지 준위는 상기 코어의 LUMO 에너지 준위보다 크고, 상기 쉘의 HOMO 에너지 준위는 상기 코어의 HOMO 에너지 준위보다 작으며,
상기 정공 수송층의 HOMO 에너지 준위는 상기 코어의 HOMO 에너지 준위와 유사한 에너지 준위를 가지는 발광 소자. - 제10항에서,
상기 정공 수송층은 p타입의 도펀트를 포함하는 발광 소자. - 제11항에서,
상기 정공 수송층은 p-CuI, p-TlI, p-AgI, p-CdI2, p-HgI2, p-SnI2, p-PbI2, p-BiI3, p-ZnI2, p-MnI2, p-FeI2, p-CoI2, p-NiI2, p-AlI3, p-In2S3, p-Cu2S, p-Ag2S, p-ZnO, p-ZnTe, p-ZnSe 및 p-ZnS 중 적어도 하나를 포함하는 발광 소자. - 제11항에서,
상기 p타입 도펀트는 금속 및 할로겐 원소 중 적어도 하나를 포함하는 발광 소자. - 기판,
상기 기판 위에 위치하는 박막 트랜지스터,
상기 박막 트랜지스터와 연결되는 제1 전극,
상기 제1 전극 위에 위치하며 양자점을 포함하는 발광층,
상기 제1 전극과 상기 발광층 사이에 위치하는 정공 수송층, 및
상기 발광층 위에 위치하는 제2 전극을 포함하며,
상기 양자점은 Zn, Te, Se 및 S로부터 선택된 적어도 2 종을 포함하는 코어, 및 Mg 및 Te를 포함하는 쉘을 포함하고,
상기 쉘의 LUMO 에너지 준위는 상기 코어의 LUMO 에너지 준위보다 크고, 상기 쉘의 HOMO 에너지 준위는 상기 코어의 HOMO 에너지 준위보다 작으며,
상기 정공 수송층의 HOMO 에너지 준위는 상기 코어의 HOMO 에너지 준위와 유사한 에너지 준위를 가지는 표시 장치. - 제14항에서,
상기 코어는 ZnSe, ZnS, 및 ZnTe 중 적어도 하나를 포함하는 표시 장치. - 삭제
- 제14항에서,
상기 정공 수송층은 p타입의 도펀트를 포함하는 화합물을 포함하는 표시 장치. - 제17항에서,
상기 정공 수송층은 p-CuI, p-TlI, p-AgI, p-CdI2, p-HgI2, p-SnI2, p-PbI2, p-BiI3, p-ZnI2, p-MnI2, p-FeI2, p-CoI2, p-NiI2, p-AlI3, p-In2S3, p-Cu2S, p-Ag2S, p-ZnO, p-ZnTe, p-ZnSe 및 p-ZnS 중 적어도 하나를 포함하는 표시 장치. - 제17항에서,
상기 p타입 도펀트는 금속 또는 할로겐 원소인 표시 장치.
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