ZnxCd1-xS quantum dots-based white light-emitting diodes

Hong Shuo Chen, Kuan Wen Wang, Sheng Shiun Chen, Shu Ru Chung

研究成果: 雜誌貢獻期刊論文同行評審

23 引文 斯高帕斯(Scopus)

摘要

In this study, two kinds of colloidal ternary semiconductor white light-emitting quantum dots (WQDs), Zn0.5Cd0.5S and Zn0.8Cd0.2S, are prepared and used as nanophosphors in a UV light-emitting diode (UV-LED) pumping device. When the weight ratio of Zn0.5Cd0.5S WQDs is 9.1 wt. % in silicone and the drive current is set at 20 mA, the chromaticity coordinates (CIE), correlated color temperature (CCT), color rendering index (CRI), and luminous efficiency are (0.43,0.37), 2830 K, 90, and 0.94 lm/W, respectively. On the other hand, under the same weight ratio in silicone, the CIE, CCT, CRI, and luminous efficiency of Zn0.8Cd0.2S WQDs are (0.36,0.33), 4240 K, 86, and 4.12 lm/W, respectively. Based on the above results, we can conclude that WQDs-based LED can be obtained by controlling the compositions of ZnxCd 1-xS QDs due to the coexistence of band-edge and surface state emission.

原文???core.languages.en_GB???
頁(從 - 到)2080-2082
頁數3
期刊Optics Letters
38
發行號12
DOIs
出版狀態已出版 - 15 6月 2013

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