Liquid-type AgInS2/ZnS quantum dot-based warm white light-emitting diodes

An improved luminous efficiency and enhanced stability for the white light-emitting diode was achieved due to the new device structure. [Display omitted] •A novel structure was designed to contain quantum dot solution.•The color rendering index was improved by adding the red-emitting AgInS2/ZnS QDs....

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Bibliographic Details
Published in:Chemical physics letters 2016-09, Vol.661, p.228-233
Main Authors: Lu, Min, Bai, Xue, Lin, Yijun, Ji, Changyin, Wu, Hua, Ruan, Cheng, Gao, Wenzhu, Wang, Yiding, Du, Qiaoling
Format: Article
Language:English
Subjects:
AgInS2
Liquid-type
Quantum dot
White light-emitting diodes
ZnS
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Summary:An improved luminous efficiency and enhanced stability for the white light-emitting diode was achieved due to the new device structure. [Display omitted] •A novel structure was designed to contain quantum dot solution.•The color rendering index was improved by adding the red-emitting AgInS2/ZnS QDs.•The liquid-type WLED has better performances in luminous efficiency and stability. We here report a warm white light-emitting diode (WLED) by employing the red-emitting liquid layer of AgInS2/ZnS quantum dots (QDs) over the yellow-emitting YAG:Ce phosphor-based WLEDs. Compared to the commercial WLEDs, our liquid-type QD-WLEDs exhibit a color temperature of 3500K and an improved color rendering index of 85. In addition, the experimental results indicate that the liquid structure warm white light device has a higher luminous efficiency of 72.1lm/W and a better color stability against the extended working time in comparison to the solid-type QD-WLEDs.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2016.09.007