| 학회 | 한국재료학회 |
| 학술대회 | 2018년 봄 (05/16 ~ 05/18, 삼척 쏠비치 호텔&리조트) |
| 권호 | 24권 1호 |
| 발표분야 | F. 광기능/디스플레이 재료 분과 |
| 제목 | Design of long-term stable green-emitting halide perovskite for application in highly efficient white LEDs |
| 초록 | Recently, the wide color gamut (WCG) of the white LEDs is an important issue for more realistic colour of display. Therefore, many researches about high colour purity luminescence material have been studying. Organic-inorganic halide perovskite (OIP) nanocrystals (NCs) have attained great attention as the candidates for optoelectronic devices due to their outstanding optical properties such as the wide color tunability, narrow full width at half maximum (FWHM) of emission, high photoluminescence quantum yields (PLQYs) and these low economic and energetic costs. However, because of the stability issues to moisture, temperature, light and air environment, all-inorganic CsPbX3 (X=Cl, Br, I) NCs have been reported to further improve a stability. In this study, we successfully synthesized the high color purity perovskite NCs with enhanced PLQYs of 99.7% and a narrow FWHM of 21 nm by substituting the Cs cations with Rb cations. Subsequently, (Cs0.4Rb0.6)PbBr3 NCs was integrated with mesoporous silica (m-SiO2) matrix. The m-SiO2 efficiently improved the thermal- and photo- stability of the perovskite NCs. Finally, the down-conversion white LEDs designed by the perovskite NCs@m-SiO2 composite with red-emitting K2SiF6:Mn4+ phosphor on blue InGaN LED was characterized. |
| 저자 | Seung Hee Choi1, Jung Hyeon Yoo1, Hyun Bin Kim1, Seok Bin Kwon1, Seong Guk Jeong1, Young Hyun Song2, Dae Ho Yoon1 |
| 소속 | 1Sungkyunkwan Univ. (SKKU), 2Korea Photonics Technology Institute (KOPTI) |
| 키워드 | perovskite; halide perovskite; green; luminescence material; display; LED |
