| 학회 | 한국재료학회 |
| 학술대회 | 2017년 봄 (05/17 ~ 05/19, 목포 현대호텔) |
| 권호 | 23권 1호 |
| 발표분야 | F. 광기능/디스플레이 재료 분과 |
| 제목 | (Cs,Rb)PbBr3 green halide perovskite quantum dots with mesoporous SiO2 nanocomposite for highly efficient white LEDs |
| 초록 | Recently, halide perovskite quantum dots (PeQDs) have attained great attention as the candidates for optoelectronic devices due to their outstanding electrical and optical properties. PeQDs facilitate highly efficient light generation due to the wide color tunability (400-800 nm), narrow full width at half maximum (FWHM) of emission (~ 20 nm), and high photoluminescence quantum yields (PLQYs) but also these low economic and energetic costs. In order to realize wide color gamut (WCG) and high color rendering index (CRI) of the white LEDs, many researches about high purity green emitting material have been studying. In this study, we successfully synthesized high quality green (Cs0.4Rb0.6)PbBr3 PeQDs with a FWHM of 21 nm and an absolute PLQY of 99.7%. With substituting Rb cation into the Cs site, PL properties was enhanced and emission peak was shifted towards to shorter wavelength. Subsequently, (Cs0.4Rb0.6)PbBr3 NCs was integrated with mesoporous silica to improve thermal stability of the perovskite NCs on InGaN LED chip with increasing forward-bias current. Finally, we optimized luminescence properties of the white light generation in the application of LEDs. |
| 저자 | Seung Hee Choi1, Seok Bin Kwon2, Chul Woo Lee1, Jung Hyeon Yoo2, Hyun Bin Kim1, Young Hyun Song2, Sung Hoon Kwag1, Young Hun Lee2, Min Seob Kim1, Dae Ho Yoon2 |
| 소속 | 1School of Advanced Materials Science and Engineering, 2Sungkyunkwan Univ. (SKKU) |
| 키워드 | <P>Halide perovskite; Perovskite; Quantum dot; Nanocrystal; LED; Mesoporous silica</P> |
