KR100901947B1 - 반도체 나노결정을 이용하는 백색 발광 다이오드 및 그의제조방법 - Google Patents
반도체 나노결정을 이용하는 백색 발광 다이오드 및 그의제조방법 Download PDFInfo
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- KR100901947B1 KR100901947B1 KR1020060066231A KR20060066231A KR100901947B1 KR 100901947 B1 KR100901947 B1 KR 100901947B1 KR 1020060066231 A KR1020060066231 A KR 1020060066231A KR 20060066231 A KR20060066231 A KR 20060066231A KR 100901947 B1 KR100901947 B1 KR 100901947B1
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- Prior art keywords
- light emitting
- emitting diode
- emitting layer
- green
- layer
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- UPWPDUACHOATKO-UHFFFAOYSA-K gallium trichloride Chemical compound Cl[Ga](Cl)Cl UPWPDUACHOATKO-UHFFFAOYSA-K 0.000 description 1
- SBDRYJMIQMDXRH-UHFFFAOYSA-N gallium;sulfuric acid Chemical compound [Ga].OS(O)(=O)=O SBDRYJMIQMDXRH-UHFFFAOYSA-N 0.000 description 1
- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium oxide Inorganic materials O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 description 1
- 229910021478 group 5 element Inorganic materials 0.000 description 1
- 229910021476 group 6 element Inorganic materials 0.000 description 1
- 150000002391 heterocyclic compounds Chemical class 0.000 description 1
- ORTRWBYBJVGVQC-UHFFFAOYSA-N hexadecane-1-thiol Chemical compound CCCCCCCCCCCCCCCCS ORTRWBYBJVGVQC-UHFFFAOYSA-N 0.000 description 1
- KYYWBEYKBLQSFW-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O.CCCCCCCCCCCCCCCC(O)=O KYYWBEYKBLQSFW-UHFFFAOYSA-N 0.000 description 1
- LNZGAWGNDIUUEU-UHFFFAOYSA-N hexylphosphonic acid Chemical compound C(CCCCC)P(O)(O)=O.C(CCCCC)P(O)(O)=O LNZGAWGNDIUUEU-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- DLINORNFHVEIFE-UHFFFAOYSA-N hydrogen peroxide;zinc Chemical compound [Zn].OO DLINORNFHVEIFE-UHFFFAOYSA-N 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- 229910000337 indium(III) sulfate Inorganic materials 0.000 description 1
- PSCMQHVBLHHWTO-UHFFFAOYSA-K indium(iii) chloride Chemical compound Cl[In](Cl)Cl PSCMQHVBLHHWTO-UHFFFAOYSA-K 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
- XGCKLPDYTQRDTR-UHFFFAOYSA-H indium(iii) sulfate Chemical compound [In+3].[In+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O XGCKLPDYTQRDTR-UHFFFAOYSA-H 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000000155 isotopic effect Effects 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 229940046892 lead acetate Drugs 0.000 description 1
- RLJMLMKIBZAXJO-UHFFFAOYSA-N lead nitrate Chemical compound [O-][N+](=O)O[Pb]O[N+]([O-])=O RLJMLMKIBZAXJO-UHFFFAOYSA-N 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- PIJPYDMVFNTHIP-UHFFFAOYSA-L lead sulfate Chemical compound [PbH4+2].[O-]S([O-])(=O)=O PIJPYDMVFNTHIP-UHFFFAOYSA-L 0.000 description 1
- YAFKGUAJYKXPDI-UHFFFAOYSA-J lead tetrafluoride Chemical compound F[Pb](F)(F)F YAFKGUAJYKXPDI-UHFFFAOYSA-J 0.000 description 1
- HWSZZLVAJGOAAY-UHFFFAOYSA-L lead(II) chloride Chemical compound Cl[Pb]Cl HWSZZLVAJGOAAY-UHFFFAOYSA-L 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- NGYIMTKLQULBOO-UHFFFAOYSA-L mercury dibromide Chemical compound Br[Hg]Br NGYIMTKLQULBOO-UHFFFAOYSA-L 0.000 description 1
- 229910000474 mercury oxide Inorganic materials 0.000 description 1
- 229910000370 mercury sulfate Inorganic materials 0.000 description 1
- SCTINZGZNJKWBN-UHFFFAOYSA-M mercury(1+);fluoride Chemical compound [Hg]F SCTINZGZNJKWBN-UHFFFAOYSA-M 0.000 description 1
- QKEOZZYXWAIQFO-UHFFFAOYSA-M mercury(1+);iodide Chemical compound [Hg]I QKEOZZYXWAIQFO-UHFFFAOYSA-M 0.000 description 1
- UKWHYYKOEPRTIC-UHFFFAOYSA-N mercury(ii) oxide Chemical compound [Hg]=O UKWHYYKOEPRTIC-UHFFFAOYSA-N 0.000 description 1
- 125000000896 monocarboxylic acid group Chemical group 0.000 description 1
- LFLZOWIFJOBEPN-UHFFFAOYSA-N nitrate, nitrate Chemical compound O[N+]([O-])=O.O[N+]([O-])=O LFLZOWIFJOBEPN-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- RQFLGKYCYMMRMC-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O.CCCCCCCCCCCCCCCCCC(O)=O RQFLGKYCYMMRMC-UHFFFAOYSA-N 0.000 description 1
- KZCOBXFFBQJQHH-UHFFFAOYSA-N octane-1-thiol Chemical compound CCCCCCCCS KZCOBXFFBQJQHH-UHFFFAOYSA-N 0.000 description 1
- LOJDCAMNNRALFJ-UHFFFAOYSA-N octylphosphonic acid Chemical compound C(CCCCCCC)P(O)(O)=O.C(CCCCCCC)P(O)(O)=O LOJDCAMNNRALFJ-UHFFFAOYSA-N 0.000 description 1
- PVADDRMAFCOOPC-UHFFFAOYSA-N oxogermanium Chemical compound [Ge]=O PVADDRMAFCOOPC-UHFFFAOYSA-N 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- HSAJRDKFYZAGLU-UHFFFAOYSA-M perchloryloxymercury Chemical compound [Hg+].[O-]Cl(=O)(=O)=O HSAJRDKFYZAGLU-UHFFFAOYSA-M 0.000 description 1
- NMHMNPHRMNGLLB-UHFFFAOYSA-N phloretic acid Chemical compound OC(=O)CCC1=CC=C(O)C=C1 NMHMNPHRMNGLLB-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 150000003138 primary alcohols Chemical class 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- DWUCCPNOMFYDOL-UHFFFAOYSA-N propyl(sulfanyl)silicon Chemical compound CCC[Si]S DWUCCPNOMFYDOL-UHFFFAOYSA-N 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 150000003333 secondary alcohols Chemical class 0.000 description 1
- GOBNDSNLXZYUHQ-UHFFFAOYSA-N selenium;tributylphosphane Chemical compound [Se].CCCCP(CCCC)CCCC GOBNDSNLXZYUHQ-UHFFFAOYSA-N 0.000 description 1
- MJNSMKHQBIVKHV-UHFFFAOYSA-N selenium;trioctylphosphane Chemical compound [Se].CCCCCCCCP(CCCCCCCC)CCCCCCCC MJNSMKHQBIVKHV-UHFFFAOYSA-N 0.000 description 1
- SCTHSTKLCPJKPF-UHFFFAOYSA-N selenium;triphenylphosphane Chemical compound [Se].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 SCTHSTKLCPJKPF-UHFFFAOYSA-N 0.000 description 1
- ANOBYBYXJXCGBS-UHFFFAOYSA-L stannous fluoride Chemical compound F[Sn]F ANOBYBYXJXCGBS-UHFFFAOYSA-L 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 150000003509 tertiary alcohols Chemical class 0.000 description 1
- IEXRMSFAVATTJX-UHFFFAOYSA-N tetrachlorogermane Chemical compound Cl[Ge](Cl)(Cl)Cl IEXRMSFAVATTJX-UHFFFAOYSA-N 0.000 description 1
- FMICIFTYQIFPIM-UHFFFAOYSA-N tetradecylphosphonic acid Chemical compound C(CCCCCCCCCCCCC)P(O)(O)=O.C(CCCCCCCCCCCCC)P(O)(O)=O FMICIFTYQIFPIM-UHFFFAOYSA-N 0.000 description 1
- GXMNGLIMQIPFEB-UHFFFAOYSA-N tetraethoxygermane Chemical compound CCO[Ge](OCC)(OCC)OCC GXMNGLIMQIPFEB-UHFFFAOYSA-N 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- FAKFSJNVVCGEEI-UHFFFAOYSA-J tin(4+);disulfate Chemical compound [Sn+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O FAKFSJNVVCGEEI-UHFFFAOYSA-J 0.000 description 1
- LTSUHJWLSNQKIP-UHFFFAOYSA-J tin(iv) bromide Chemical compound Br[Sn](Br)(Br)Br LTSUHJWLSNQKIP-UHFFFAOYSA-J 0.000 description 1
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- YJGJRYWNNHUESM-UHFFFAOYSA-J triacetyloxystannyl acetate Chemical compound [Sn+4].CC([O-])=O.CC([O-])=O.CC([O-])=O.CC([O-])=O YJGJRYWNNHUESM-UHFFFAOYSA-J 0.000 description 1
- TUQOTMZNTHZOKS-UHFFFAOYSA-N tributylphosphine Chemical compound CCCCP(CCCC)CCCC TUQOTMZNTHZOKS-UHFFFAOYSA-N 0.000 description 1
- WLPUWLXVBWGYMZ-UHFFFAOYSA-N tricyclohexylphosphine Chemical compound C1CCCCC1P(C1CCCCC1)C1CCCCC1 WLPUWLXVBWGYMZ-UHFFFAOYSA-N 0.000 description 1
- RXJKFRMDXUJTEX-UHFFFAOYSA-N triethylphosphine Chemical compound CCP(CC)CC RXJKFRMDXUJTEX-UHFFFAOYSA-N 0.000 description 1
- QNLQKURWPIJSJS-UHFFFAOYSA-N trimethylsilylphosphane Chemical compound C[Si](C)(C)P QNLQKURWPIJSJS-UHFFFAOYSA-N 0.000 description 1
- ZMBHCYHQLYEYDV-UHFFFAOYSA-N trioctylphosphine oxide Chemical compound CCCCCCCCP(=O)(CCCCCCCC)CCCCCCCC ZMBHCYHQLYEYDV-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229940102001 zinc bromide Drugs 0.000 description 1
- 239000011667 zinc carbonate Substances 0.000 description 1
- 235000004416 zinc carbonate Nutrition 0.000 description 1
- 229910000010 zinc carbonate Inorganic materials 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
- GTLDTDOJJJZVBW-UHFFFAOYSA-N zinc cyanide Chemical compound [Zn+2].N#[C-].N#[C-] GTLDTDOJJJZVBW-UHFFFAOYSA-N 0.000 description 1
- 229940105296 zinc peroxide Drugs 0.000 description 1
- 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
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
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- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
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Abstract
Description
Claims (30)
- 청색 발광 다이오드 상에 적색 발광체와 녹색 발광체를 포함하는 발광층이 형성된 백색 발광 다이오드로서, 상기 발광층은 1 종 이상의 무기 형광체와 1 종 이상의 반도체 나노결정을 함께 포함하며, 상기 반도체 나노결정 중 1종 이상은 다층 구조 반도체 나노결정으로서, 각 층이 두 가지 이상의 원소로 조성된 화합물 반도체로 구성된 것을 특징으로 하는 백색 발광 다이오드.
- 제 1항에 있어서, 상기 적색 발광체가 적색 형광체 또는 적색 발광 반도체 나노결정을 단독으로 포함하거나 양자를 모두 포함하고,상기 녹색 발광체가 녹색 형광체 또는 녹색 발광 반도체 나노결정을 단독으로 포함하거나 양자를 모두 포함하는 것을 특징으로 하는 백색 발광 다이오드.
- 제 1항에 있어서, 상기 발광층은 적색 발광체와 녹색 발광체의 혼합발광체층인 것을 특징으로 하는 백색 발광 다이오드.
- 제 1항에 있어서, 상기 발광층은상기 청색 발광 다이오드 상에 형성된 녹색 발광체층; 및상기 녹색 발광체층 위에 형성된 적색 발광체층을 포함하는 것을 특징으로 하는 백색 발광 다이오드.
- 제 1항에 있어서, 상기 발광층은적색 발광체와 녹색 발광체의 혼합발광체층; 및상기 혼합발광체층 상에 형성된 적색 발광체층을 포함하는 것을 특징으로 하는 백색 발광 다이오드.
- 제 1항에 있어서, 상기 발광층은적색 발광체와 녹색 발광체의 혼합발광체층; 및상기 혼합발광체층 상에 형성된 녹색 발광체층을 포함하는 것을 특징으로 하는 백색 발광 다이오드.
- 삭제
- 제 1항에 있어서, 상기 다층 구조 반도체 나노결정은 각 층 사이의 계면에 두 종류 이상의 반도체 나노결정의 합금층(alloy interlayer)을 포함하는 것을 특징으로 하는 백색 발광 다이오드.
- 제 8항에 있어서, 상기 합금층이 물질 조성의 기울기를 갖는 합금층(gradient alloy)인 것을 특징으로 하는 백색 발광 다이오드.
- 제 1항에 있어서, 상기 다층 구조 반도체 나노결정은 각 층들 중 하나 이상이 두 종류 이상의 반도체 나노결정의 합금층(alloy)을 포함하는 것을 특징으로 하는 백색 발광 다이오드.
- 제 10항에 있어서, 상기 합금층이 물질 조성의 기울기를 갖는 합금층(gradient alloy)인 것을 특징으로 하는 백색 발광 다이오드.
- 제 1항 내지 제 6항 및 제 8항 내지 제 11항 중 어느 하나의 항에 있어서, 상기 반도체 나노결정은 II-VI족 화합물, III-V족 화합물, IV-VI족 화합물, IV족 화합물 또는 이들의 혼합물에서 선택되는 것임을 특징으로 하는 백색 발광 다이오드.
- 제 12항에 있어서, 상기 II-VI족 화합물은 CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe의 이원소 화합물; CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe의 삼원소 화합물; 및 HggZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe의 사원소 화합물로 이루어진 군에서 선택되는 물질이고,상기 III-V족 화합물 반도체는 GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb의 이원소 화합물; GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP의 삼원소 화합물; 및 GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb의 사원소 화합물로 이루어진 군에서 선택되는 물질이고,상기 IV-VI족 화합물은 SnS, SnSe, SnTe, PbS, PbSe, PbTe의 이원소 화합물; SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe의 삼원소 화합물; 및 SnPbSSe, SnPbSeTe, SnPbSTe의 사원소 화합물로 이루어진 군에서 선택되는 물질이고,상기 IV족 화합물은 Si, Ge의 단일 원소 화합물 또는 SiC, SiGe의 이원소 화합물로 이루어진 군에서 선택되는 물질인 것을 특징으로 백색 발광 다이오드.
- 제 1항 내지 제 6항 및 제 8항 내지 제 11항 중 어느 하나의 항에 있어서, 상기 반도체 나노결정은 형태가 구형, 정사면체(tetrahedron), 원통형, 막대형, 삼각형, 원판형(disc), 트리포드(tripod), 테트라포드(tetrapod), 큐브(cube), 박스(box), 스타(star), 튜브(tube)로 이루어진 군에서 선택되는 것을 특징으로 하는 백색 발광 다이오드.
- 제 1항 내지 제 6항 및 제 8항 내지 제 11항 중 어느 하나의 항에 따른 백색 발광 다이오드를 포함하는 백라이트 유닛.
- 제 15항의 백라이트 유닛을 포함하는 표시장치.
- 청색 발광 다이오드 상에 적색 발광체와 녹색 발광체를 포함하는 발광층이 형성된 백색 발광 다이오드를 제조함에 있어서, 청색 발광 다이오드를 제공하는 단계; 및 상기 청색 발광 다이오드 위에 1종 이상의 반도체 나노결정과 1종 이상의 무기 형광체를 함께 포함하는 발광층을 형성하는 단계를 포함하고, 여기서 상기 반도체 나노결정 중 1종 이상은 다층 구조 반도체 나노결정으로서, 각 층이 두 가지 이상의 원소로 조성된 화합물 반도체로 구성된 것을 특징으로 하는 백색 발광 다이오드의 제조방법.
- 제 17항에 있어서, 상기 발광층 형성 단계는 상기 청색 발광 다이오드 상에 적색 발광체와 녹색 발광체를 포함하는 발광층을 형성하는 단계로서, 적색 발광체로서 적색 형광체 또는 적색 발광 반도체 나노결정을 단독으로 사용하거나 양자를 모두 사용하고, 상기 녹색 발광체로서 녹색 형광체 또는 녹색 발광 반도체 나노결정을 단독으로 사용하거나 양자를 모두 사용하여 발광체층을 형성하는 단계임을 특징으로 하는 백색 발광 다이오드의 제조방법.
- 제 18항에 있어서, 상기 발광층 형성 단계는 상기 청색 발광 다이오드 위에 적색 발광체와 녹색 발광체의 혼합발광체층을 형성하는 단계임을 특징으로 하는 백색 발광 다이오드의 제조방법.
- 제 18항에 있어서, 상기 발광층 형성 단계는상기 청색 발광 다이오드 상에 녹색 발광체층을 형성하는 단계; 및상기 녹색 발광체층 위에 적색 발광체층을 형성하는 단계를 포함하는 것을 특징으로 하는 백색 발광 다이오드의 제조방법.
- 제 18항에 있어서, 상기 발광층 형성 단계는상기 청색 발광 다이오드 상에 적색 발광 반도체 나노결정과 녹색 발광 반도체 나노결정의 혼합발광체층을 형성하는 단계; 및상기 혼합발광체층 상에 형성된 적색 발광체층을 형성하는 단계를 포함하는 것을 특징으로 하는 백색 발광 다이오드의 제조방법.
- 제 18항에 있어서, 상기 발광층 형성 단계는상기 청색 발광 다이오드 상에 적색 발광체와 녹색 발광체의 혼합발광체층을 형성하는 단계; 및상기 혼합발광체층 상에 녹색 발광체층을 형성하는 단계를 포함하는 것을 특징으로 하는 백색 발광 다이오드의 제조방법.
- 삭제
- 제 17항에 있어서, 상기 다층 구조 반도체 나노결정은 각 층 사이의 계면에 두 종류 이상의 반도체 나노결정의 합금층(alloy interlayer)을 포함하는 것임을 특징으로 하는 백색 발광 다이오드의 제조방법.
- 제 24항에 있어서, 상기 합금층이 물질 조성의 기울기를 갖는 합금층(gradient alloy)인 것을 특징으로 하는 백색 발광 다이오드의 제조방법.
- 제 17항에 있어서, 상기 다층 구조 반도체 나노결정은 각 층들 중 하나 이상이 두 종류 이상의 반도체 나노결정의 합금층(alloy)을 포함하는 것을 특징으로 하는 백색 발광 다이오드의 제조방법.
- 제 26항에 있어서, 상기 합금층이 물질 조성의 기울기를 갖는 합금층(gradient alloy)인 것을 특징으로 하는 백색 발광 다이오드의 제조방법.
- 제 18항에 있어서, 상기 발광층 형성 단계는 형광체 또는 반도체 나노결정 또는 형광체와 반도체 나노결정을 유기 바인더를 포함하는 페이스트로 제조하여 적층하는 단계임을 것을 특징으로 하는 백색 발광 다이오드 제조방법.
- 제 28항에 있어서, 상기 유기 바인더가 아크릴계 수지, 실리콘계 수지 또는 에폭시계 수지인 것을 특징으로 하는 백색 발광 다이오드 제조방법.
- 제 28항에 있어서, 상기 적층 단계는 드롭 캐스팅(drop casting), 스핀 코팅(spin coating), 딥 코팅(dip coating), 분무 코팅(spray coating), 흐름 코팅(flow coating) 또는 스크린 인쇄(screen printing)에 의해 수행되는 것을 특징으로 하는 백색 발광 다이오드 제조방법.
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