Novel Bromide Quaternary Ammonium Ligand for Synthesizing High Fluorescence Efficiency CsPbBn Perovskite Quantum Dots and Their Fabrication of White Light-Emitting Diodes with Wide Color Gamut

2019 International Conference on Advanced Electronic Materials, Computers and Materials Engineering

无线电电子学;计算机科学;材料科学

Xie, Qifei^1 ; Li, Yue^1 ; Min, Xianhao^1^2 ; Ma, Yanhong^1 ; Wang, Xinzhong^1

School of Electronic Communication Technology, Shenzhen Institute of Information Technology, Shenzhen

518172, China^1

School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan

430074, China^2

关键词: Color coordinates;    Fluorescence efficiency;    ITU-R recommendation;    National television system committees;    Quaternary ammonium;    Ultra-violet light;    White light emitting diodes;    Wide color gamut;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/563/2/022047/pdf
DOI  :  10.1088/1757-899X/563/2/022047

来源: IOP

【 摘 要 】

We proposed a novel bromine quaternary ammonium ligand to synthesize high quantum yield (QY) CsPbBr3 quantum dots (QDs). The QY of CsPbBr3 QDs synthesized by this ligand reached 95% and the full width at half maximum (FWHM) was as narrow as 17nm. The peak wavelength of the prepared CsPbBr3 QDs was 530nm. And these QDs emitted high purity green light under ultraviolet light. The color coordinate of white LED (WLED) prepared with the CsPbBr3 QDs was (0.29, 0.31), which was very close to pure white light. The color gamut of the WLED covered 130% of the national television system committee (NTSC) color standard and 96% of the ITU-R Recommendation BT.2020 (Rec.2020) color standard.