Abstract
Whole visible range emitting CuInS2/ZnS QDs were obtained with broad band-width and high luminous efficiency by altering the Cu/In ratio and coating ZnS layer. 1-Dodecanethiol (DDT) as a sulfur source in the ZnS coating process can inhibit the lattice defects caused by Zn2+ inter-diffusion, thus increasing the photoluminescence quantum yield (PL QY). Then the stability and lighting performance of white light-emitting diodes (WLEDs) based on these CuInS2/ZnS QDs were characterized. The optimized WLED device exhibited a moderate luminous efficacy (LE) (70.33 lm·W-1) and ultrahigh color qualities (CRI Ra = 92.7, R9 = 95.9, R13 = 96.3) with warm white at a correlated color temperature (CCT) of 4052 K.
Funder
National Natural Science Foundation of China
Basic and Applied Basic Research Foundation of Guangdong Province
Natural Science Foundation of Jiangxi Province
Key Scientific Research Platforms and Projects in Guangdong Universities
Scientific Research Foundation of the Higher Education Institutions of Guangdong Province
Scientific Foundation of the Higher Education Institutions of Guangdong Province
Open Project Program of Guangdong Provincial Key Laboratory of Development and Education for Special Needs Children
Lei Yang Scholar Program Funded Project of Lingnan Normal University
Subject
Atomic and Molecular Physics, and Optics