53% Efficient Red Emissive Carbon Quantum Dots for High Color Rendering and Stable Warm White-Light-Emitting Diodes.

Wang, Zifei; Yuan, Fanglong; Li, Xiaohong; Li, Yunchao; Zhong, Haizheng; Fan, Louzhen; Yang, Shihe · Adv Mater · 2017

basic_science · Level V

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Abstract

Red emissive carbon quantum dots (R-CQDs) with quantum yield of 53% is successfully prepared. An ultraviolet (UV)-pumped CQD phosphors-based warm white light-emitting diode (WLED) is realized for the first time and achieves a color rendering index of 97. This work provides a new avenue for the exploration of low cost, environment-friendly, and high-performance CQD phosphors-based warm WLEDs.