High Stability of Liquid-Typed White Light-Emitting Diode with Zn0.8Cd0.2S White Quantum Dots

Coatings

Chin-Chuan Huang¹  Kuo-Hsiung Chu²  Chia-Wei Sun²  Hao-Chung Kuo²  Chin-Wei Sher³  Chun-Liang Lin⁴  Yan-Kuin Su⁴ 

[1] Department of Electrical Engineering, Institute of Microelectronics, National Cheng Kung University, Tainan 701401, Taiwan;Department of Photonics and Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University & National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan;Fok Ying Tung Institute, Hong Kong University of Science and Technology, Nansha 511458, China;Green Energy Technology Research Center, Kun Shan University, Tainan 71000, Taiwan;

关键词: quantum dots;    ultraviolet;    CdSe/ZnS;    luminous efficiency;   

DOI  :  10.3390/coatings11040415

来源: DOAJ

【 摘 要 】

In this study, we demonstrate a new design of white light-emitting diode (WLED) with high stability and luminous efficiency as well as positive aging. Colloidal ternary Zn_0.8Cd_0.2S (named Zn_0.8) white quantum dots (WQDs) were prepared by chemical route and dispersed in xylene, integrating them into an ultraviolet light-emitting diode (UV-LED) to form WQD-white light emitting diode (WQD-WLED). High efficiency, high color quality and excellent reliability of WQD-WLED with neutral white correlated color temperature (CCT) can be obtained. The experimental results indicate that the stability of relative luminous efficiency and color rendering index (CRI) of the WQD-WLED can reach up to 160 and 82%, respectively. Moreover, the WQD-WLED can operate more than 1000 h under 100 mA, and the quantity of WQDs in the glass package can be reduced.

【 授权许可】

Unknown