KR102530756B1 - 불화물계 형광체, 불화물계 형광체 제조방법 및 발광장치 - Google Patents
불화물계 형광체, 불화물계 형광체 제조방법 및 발광장치 Download PDFInfo
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Abstract
Description
도 2a 및 도 2b는 본 발명의 일 실시예 및 비교예에 따른 불화물계 형광체의 X선 회절 분석(X-Ray Diffraction, XRD) 결과를 도시하는 그래프이다.
도 3은 본 발명의 일 실시예에 따른 불화물계 형광체의 XRD 결과를 도시하는 그래프이다.
도 4는 본 발명의 일 실시예에 따른 불화물계 형광체의 발광 스펙트럼을 도시하는 그래프이다.
도 5는 본 발명의 일 실시예에 따른 불화물계 형광체의 XRD 결과를 도시하는 그래프이다.
도 6은 본 발명의 일 실시예에 따른 불화물계 형광체의 발광 스펙트럼을 도시하는 그래프이다.
도 7은 본 발명의 일 실시예에 따른 불화물계 형광체의 여기 및 발광 스펙트럼을 도시하는 그래프이다.
도 8은 본 발명의 일 실시예에 따른 불화물계 형광체의 XRD 결과를 도시하는 그래프이다.
도 9는 본 발명의 일 실시예에 따른 불화물계 형광체의 XRD 결과를 도시하는 그래프이다.
도 10은 본 발명의 일 실시예에 따른 불화물계 형광체 제조방법을 설명하기 위한 흐름도이다.
도 11은 본 발명의 일 실시예에 따른 불화물계 형광체의 신뢰성을 나타내는 그래프이다.
도 12는 본 발명의 일 실시예에 따른 발광장치의 개략적인 단면도이다.
도 13은 본 발명의 일 실시예에 따른 발광장치의 개략적인 단면도이다.
도 14는 본 발명의 일 실시예에 따른 발광장치에 채용 가능한 파장변환 물질을 설명하기 위한 CIE 좌표계이다.
도 15는 본 발명의 일 실시예에 따른 백색 광원모듈의 개략적인 단면도이다.
도 16은 본 발명의 일 실시예에 따른 백라이트 유닛의 개략적인 단면도이다.
도 17은 본 발명의 일 실시예에 따른 디스플레이 장치의 개략적인 분해사시도이다.
도 18은 본 발명의 실시예에 따른 조명 장치의 개략적인 분해사시도이다.
도 19는 본 발명의 실시예에 따른 조명 장치의 개략적인 분해사시도이다.
K2SiF6:Mn4 + | NH4F 5 wt% | NH4F 10 wt% | NH4F 15 wt% | |
발광 면적비 | 100 % | 94 % | 119 % | 111 % |
피크 파장 | 632 nm | 631 nm | 631 nm | 631 nm |
K2SiF6:Mn4 + | NH4F 5 wt% | NH4F 10 wt% | NH4F 15 wt% | |
발광 면적비 | 100 % | 2 % | 41 % | 74 % |
피크 파장 | 632 nm | 631 nm | 631 nm | 631 nm |
101: 기판
111, 112: 리드 프레임
120: 몸체부
130: 발광소자
140: 보호층
150: 파장변환부
152: 봉지층
154: 불화물계 형광체
155: 코팅층
156: 녹색 형광체
Claims (20)
- 하기 화학식 1로 표시되는 불화물계 형광체 제조방법으로서,
A2MF6를 포함하는 제1 원료 및 AF 또는 AHF2를 포함하는 제2 원료를 혼합하여 제1 혼합물을 형성하는 단계;
상기 제1 혼합물에 소결 조제(sintering aid)를 혼합하여 제2 혼합물을 형성하는 단계;
상기 제2 혼합물을 소성하는 단계; 및
상기 소성하는 단계에 의해 제조된 형광체 입자를 이온성 액체(ionic liquid)로 코팅하는 단계를 포함하고,
상기 제1 원료 및 상기 제2 원료는 분말 상태로 혼합되는 불화물계 형광체 제조방법.
[화학식 1]
A3MF7:Mn4+
(상기 화학식에서, A는 Li, Na, K, Rb, Cs 중 선택된 적어도 1종이며, M은 Si, Ti, Zr, Hf, Ge 및 Sn 중 선택된 적어도 1종임)
- 제1 항에 있어서,
상기 소결 조제는 불소 함유 물질인 불화물계 형광체 제조방법.
- 제2 항에 있어서,
상기 소결 조제는 NH4F, NH4HF2, F2, XeF2, 또는 KHF2 중 적어도 하나를 포함하는 불화물계 형광체 제조방법.
- 제1 항에 있어서,
상기 소결 조제는 상기 제1 혼합물에 5 wt%보다 큰 중량으로 혼합되는 불화물계 형광체 제조방법.
- 제1 항에 있어서,
상기 소성하는 단계는 250 ℃보다 높고 400 ℃보다 낮은 온도에서 수행되는 불화물계 형광체 제조방법.
- 제1 항에 있어서,
상기 소성하는 단계는 아르곤(Ar), 질소(N2), 불소(F2), 질소/불소(N2/F2) 또는 질소/수소(N2/H2) 분위기에서 수행되는 불화물계 형광체 제조방법.
- 제1 항에 있어서,
상기 소성하는 단계는 4 시간 내지 8시간 동안 수행되는 불화물계 형광체 제조방법.
- 삭제
- 제1 항에 있어서,
상기 제1 원료 및 상기 제2 원료는 1: 0.8 내지 1: 1.5의 몰비로 혼합되는 불화물계 형광체 제조방법.
- 제1 항에 있어서,
상기 제1 원료는 A2MF6:Mn4 + 형광체이고, 상기 제2 원료는 AF인 불화물계 형광체 제조방법.
- 제10 항에 있어서,
상기 제1 원료는 K2SiF6:Mn4 + 형광체이고, 상기 제2 원료는 KF, RbF, 또는 CsF 중 적어도 하나인 불화물계 형광체 제조방법.
- 제1 항에 있어서,
상기 제1 원료는 A2MF6와 A2MnF6의 혼합물이고, 상기 제2 원료는 AF인 불화물계 형광체 제조방법.
- 제12 항에 있어서,
상기 제1 원료는 K2SiF6와 K2MnF6의 혼합물이고, 상기 제2 원료는 KF인 불화물계 형광체 제조방법.
- 삭제
- 제1 항에 있어서,
상기 이온성 액체는 1-메틸-1-프로필피롤리디늄비스(트리플루오르메탄술포닐)이미드(1-methyl-1-propylpyrrolidinium Bis(trifluoromethanesulfonyl)imide)를 포함하는 불화물계 형광체 제조방법.
- 하기 화학식 1로 표시되는 불화물계 형광체 제조방법으로서,
A2MF6를 포함하는 제1 원료 및 AF 또는 AHF2를 포함하는 제2 원료를 혼합하여 제1 혼합물을 형성하는 단계;
상기 혼합물에 소결 조제(sintering aid)를 혼합하여 제2 혼합물을 형성하는 단계;
상기 제2 혼합물을 소성하여 형광체 입자를 제조하는 단계; 및
상기 형광체 입자를 이온성 액체로 코팅하는 단계를 포함하는 불화물계 형광체 제조방법.
[화학식 1]
A3MF7:Mn4 +
(상기 화학식에서, A는 Li, Na, K, Rb, Cs 중 선택된 적어도 1종이며, M은 Si, Ti, Zr, Hf, Ge 및 Sn 중 선택된 적어도 1종임)
- 조성식 A3MF7:Mn4 +로 표현되는 형광체 입자들; 및
상기 형광체 입자들의 표면을 덮으며, 이온성 액체(ionic liquid) 물질 또는 상기 이온성 액체로부터 기인한 원소 포함하는 코팅층을 포함하며,
상기 조성식에서, A는 Li, Na, K, Rb, Cs 중 선택된 적어도 1종이며, M은 Si, Ti, Zr, Hf, Ge 및 Sn 중 선택된 적어도 1종인 불화물계 형광체.
- 제17 항에 있어서,
상기 이온성 액체 물질 또는 상기 이온성 액체로부터 기인한 원소는 불소를 포함하는 불화물계 형광체.
- 제17 항에 있어서,
상기 코팅층은 1-메틸-1-프로필피롤리디늄비스(트리플루오르메탄술포닐)이미드(1-methyl-1-propylpyrrolidinium Bis(trifluoromethanesulfonyl)imide)를 포함하는 불화물계 형광체.
- 발광소자; 및
상기 발광소자로부터 방출되는 여기광을 흡수하여 가시광을 방출하는 파장변환부를 포함하고,
상기 파장변환부는, 조성식 A3MF7:Mn4 +로 표현되는 형광체 입자들, 및 상기 형광체 입자들의 표면을 덮으며, 이온성 액체 물질 또는 상기 이온성 액체로부터 기인한 원소 포함하는 코팅층을 포함하며,
상기 조성식에서, A는 Li, Na, K, Rb, Cs 중 선택된 적어도 1종이며, M은 Si, Ti, Zr, Hf, Ge 및 Sn 중 선택된 적어도 1종인 발광장치.
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