title: Efficient white light emitting diodes based on Cu-doped ZnInS/ZnS core/shell quantum dots.
abstract: We report the fabrication of efficient white light-emitting diodes (WLEDs) based on Cu : ZnInS/ZnS core/shell quantum dots (QDs) with super large Stokes shifts. The composition-controllable Cu : ZnInS/ZnS QDs with a tunable emission from deep red to green were prepared by a one-pot noninjection synthetic approach. The high performance Cu : ZnInS QD-WLEDs with the colour rendering index up to 96, luminous efficacy of 70-78 lm W(-1), and colour temperature of 3800-5760 K were successfully fabricated by integration of red and green Cu-doped QDs. Negligible energy transfer between Cu-doped QDs was clearly found by measuring the photoluminescence lifetimes of the QDs, consistent with the small spectral overlap between QD emission and absorption. The experimental results indicated low toxic Cu : ZnInS/ZnS QDs could be suitable for solid state lighting.
authors.affiliation: Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Siping 136000, People's Republic of China. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, People's Republic of China. University of Chinese Academy of Sciences, Beijing 100039, People's Republic of China.
authors.forename: Xi
authors.initials: X
authors.lastname: Yuan
authors.forename: Jie
authors.initials: J
authors.lastname: Hua
authors.forename: Ruosheng
authors.initials: R
authors.lastname: Zeng
authors.forename: Dehua
authors.initials: D
authors.lastname: Zhu
authors.forename: Wenyu
authors.initials: W
authors.lastname: Ji
authors.forename: Pengtao
authors.initials: P
authors.lastname: Jing
authors.forename: Xiangdong
authors.initials: X
authors.lastname: Meng
authors.forename: Jialong
authors.initials: J
authors.lastname: Zhao
authors.forename: Haibo
authors.initials: H
authors.lastname: Li