KR102542426B1 - 파장변환 필름과, 이를 구비한 반도체 발광장치 - Google Patents
파장변환 필름과, 이를 구비한 반도체 발광장치 Download PDFInfo
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- KR102542426B1 KR102542426B1 KR1020170176555A KR20170176555A KR102542426B1 KR 102542426 B1 KR102542426 B1 KR 102542426B1 KR 1020170176555 A KR1020170176555 A KR 1020170176555A KR 20170176555 A KR20170176555 A KR 20170176555A KR 102542426 B1 KR102542426 B1 KR 102542426B1
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- wavelength conversion
- quantum dots
- conversion film
- light emitting
- semiconductor light
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Abstract
Description
도2는 도1의 반도체 발광장치를 나타내는 평면도이다.
도3은 본 발명의 일 실시예에 따른 파장변환필름을 나타내는 개략 사시도이다.
도4a 및 도4b는 본 발명의 일 실시예에 따른 파장변환필름에 채용되는 양자점의 모식도이다.
도5는 본 발명의 일 실시예에 따른 파장변환필름의 제조방법을 설명하기 위한 공정순서도이다.
도6 및 도7은 본 발명의 일 실시예에 채용될 수 있는 반도체 발광 다이오드 칩의 다양한 예를 나타내는 측단면도이다.
도8은 본 발명의 일 실시예에 따른 반도체 발광장치를 나타내는 사시도이다.
도9는 도8에 도시된 반도체 발광장치를 나타내는 측단면도이다.
도10은 본 발명의 일 실시예에 따른 디스플레이 장치를 나타내는 분해사시도이다.
도11은 본 발명의 일 실시예에 따른 벌브형 조명장치를 나타내는 분해사시도이다.
도12는 본 발명의 일 실시예에 따른 튜브형 조명 장치를 나타내는 분해사시도이다.
Claims (20)
- 파장변환 물질과 유리 조성물을 갖는 혼합물의 소결체를 포함하며,
상기 파장변환 물질은 코어-쉘(core-shell) 구조의 양자점과 상기 양자점의 표면을 코팅하는 보호층을 포함하고, 상기 양자점의 쉘은 S 및 Se 중 적어도 하나를 함유하며 상기 보호층은 S 및 Se을 함유하지 않으며,
상기 유리 조성물은 SnO2-P2O5-SiO2계 조성물을 포함하고,
상기 보호층은 상기 소결체와 상기 양자점의 쉘 사이에서 상기 유리 조성물의 Sn과 상기 쉘의 S 또는 Se의 직접 접촉을 방지하도록 구성된 파장변환필름.
- 제1항에 있어서,
상기 유리 조성물은, 전체 유리 조성물의 중량 기준으로, 25 내지 94 wt%의 SnO2, 5 내지 70 wt%의 P2O5, 1 내지 30 wt%의 SiO2을 포함하는 것을 특징으로 하는 파장변환필름.
- 제2항에 있어서,
상기 유리 조성물은, Na2O, MgO, Al2O3, CaO, K2O 및 Li2O로 구성된 그룹에서 선택된 적어도 1종의 성분이 10wt% 이하로 첨가된 것을 특징으로 하는 파장변환필름.
- 제1항에 있어서,
상기 유리 조성물의 전이온도(Tg)는 100℃∼300℃ 범위인 것을 특징으로 하는 파장변환필름.
- 제1항에 있어서,
상기 유리 조성물의 성형온도(Tw)는 150℃∼400℃ 범위인 것을 특징으로 하는 파장변환필름.
- 제1항에 있어서,
상기 양자점의 보호층은 폴리 에틸렌 아크릴산(Poly(ethylen-co-acrylic acid)) 또는 PMAA(Poly(methyl methacrylate))인 것을 특징으로 하는 파장변환필름.
- 제1항에 있어서,
상기 양자점의 보호층은 SiO2, Al2O3, ZnO, SiOxNy 및 Si3N4로 구성된 그룹으로부터 선택된 산화물 또는 질화물인 것을 특징으로 하는 파장변환필름.
- 제1항에 있어서,
상기 양자점은, InP/ZnS, InP/ZnSe, CdSe/CdS, CdSe/ZnS, PbS/ZnS 및 InP/GaP/ZnS로 구성된 그룹으로부터 선택된 양자점인 것을 특징으로 파장변환필름.
- 제8항에 있어서,
상기 양자점은 녹색 양자점 및 적색 양자점을 포함하는 것을 특징으로 하는 파장변환필름.
- 제8항에 있어서,
상기 양자점의 직경은 5㎚∼20㎚ 범위인 것을 특징으로 하는 파장변환필름.
- 제8항에 있어서,
상기 양자점은 녹색 양자점을 포함하며,
상기 파장변환 물질은 적색 세라믹 형광체를 더 포함하는 것을 특징으로 하는 파장변환필름.
- 제11항에 있어서,
상기 적색 세라믹 형광체는, 조성식 AxMFy:Mn4 +로 표현되는 불화물 형광체를 포함하며, 여기서, A는 Li, Na, K, Rb 및 Cs 중 선택된 적어도 하나이며, M은 Si, Ti, Zr, Hf, Ge 및 Sn 중 선택된 적어도 하나이고, 상기 조성식은 2≤x≤3과 4≤y≤7를 만족하는 것을 특징으로 하는 파장변환필름.
- 제1항에 있어서,
상기 파장변환필름은 시트 형상 또는 플레이트 형상을 갖는 것을 특징으로 하는 파장변환필름.
- SnO2-P2O5-SiO2계 유리 조성물을 마련하는 단계;
상기 유리 조성물에 파장변환 물질이 혼합하는 혼합물로 성형체를 형성하는 단계; 및
상기 성형체를 300℃ 이하의 온도에서 소결하여 상기 파장변환 물질이 함유된 소결체를 형성하는 단계를 포함하며,
상기 파장변환 물질은 코어-쉘(core-shell) 구조의 양자점과 상기 양자점의 표면을 코팅하는 보호층을 포함하고, 상기 양자점의 쉘은 S 및 Se 중 적어도 하나를 함유하며 상기 보호층은 S 및 Se을 함유하지 않고,
상기 보호층은 상기 소결체와 상기 양자점의 쉘 사이에서 상기 유리 조성물의 Sn과 상기 쉘의 S 또는 Se의 직접 접촉을 방지하도록 구성된 파장변환필름 제조방법.
- 제1 및 제2 전극 구조;
상기 제1 및 제2 전극에 전기적으로 연결되며, 440㎚∼460㎚ 피크 파장의 제1 광을 방출하는 반도체 발광다이오드 칩; 및
상기 반도체 발광다이오드 칩으로부터 생성된 광의 진행 경로 상에 위치하며, 제1항에 기재된 파장변환 필름을 포함하고, 상기 파장변환 물질은 제1 광을 다른 파장의 제2 광으로 변환하는 반도체 발광장치.
- 제1 및 제2 전극 구조;
상기 제1 및 제2 전극 구조에 전기적으로 연결되며, 440㎚∼460㎚ 피크 파장의 제1 광을 방출하는 반도체 발광다이오드 칩; 및
상기 반도체 발광다이오드 칩으로부터 생성된 광의 진행 경로 상에 위치하며, 제1 광을 다른 파장의 제2 광으로 변환하기 위한 파장변환 물질과 유리 조성물을 갖는 혼합물의 소결체를 포함하는 파장변환 필름을 포함하고,
상기 파장변환 물질은 코어-쉘구조의 양자점과 상기 양자점의 표면을 코팅하는 보호층을 포함하고, 상기 양자점의 쉘은 S 및 Se 중 적어도 하나를 함유하며 상기 보호층은 S 및 Se을 함유하지 않으며, 상기 유리 조성물은 SnO2-P2O5-SiO2계 조성물을 포함하고,
상기 보호층은 상기 소결체와 상기 양자점의 쉘 사이에서 상기 유리 조성물의 Sn과 상기 쉘의 S 또는 Se의 직접 접촉을 방지하도록 구성된 반도체 발광장치.
- 제16항에 있어서,
상기 양자점은 녹색 양자점 및 적색 양자점을 포함하는 것을 특징으로 하는 반도체 발광장치.
- 제16항에 있어서,
상기 파장변환 필름은 상기 반도체 발광다이오드 칩 상에 배치되며,
상기 파장변환 필름의 일 표면이 노출되도록, 상기 제1 및 제2 전극 구조와 상기 반도체 발광다이오드 칩과 상기 파장변환 필름을 둘러싸도록 구성된 패키지 본체를 더 포함하는 반도체 발광장치.
- 제18항에 있어서,
상기 패키지 본체는 투명 수지와 상기 투명 수지에 함유된 반사성 세라믹 분말을 함유하는 것을 특징으로 하는 반도체 발광장치.
- 제16항에 있어서,
상기 제1 및 제2 전극 구조를 봉합하며, 상기 제1 및 제2 전극 구조의 일부가 노출된 오목부를 갖는 패키지 본체를 더 포함하며,
상기 파장변환 필름은 상기 오목부 상에 장착되는 것을 특징으로 하는 반도체 발광장치.
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KR20190074869A (ko) | 2019-06-28 |
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