色度
显色指数
色温
材料科学
光电子学
发光二极管
光致发光
氮化物
高颜色
复合数
光学
二极管
纳米技术
复合材料
物理
图层(电子)
人工智能
彩色图像
图像处理
计算机科学
图像(数学)
作者
Hang Zhao,Yunfei Zhao,Yuhang Sheng,Dan Zhu,Fangjian Xing,Cihui Liu,Yunsong Di,Yi Zhang,Weiping Zhou,Guoping Luo,Xiaowei Zhang,Zhixing Gan
摘要
Herein, we report a rare earth-free white light emitting composite for applications in solid-state lighting, which is made up of carbon nitride (CN) and Mn2+-doped perovskite quantum dots (PQDs). The correlated color temperature (CCT) is adjustable from 18 088 to 2926 K by varying the ratio of the two components. When the PQDs content is 2.88%, the white light emitting diode (W-LED) based on the CN/PQDs composite shows a competitive color rendering index of 88, a CCT of 5737 K, and a chromaticity coordinate of (0.327, 0.33), which is close to the standard white light. The light conversion efficiency of the composite is around 10%, which is attributed to the high photoluminescence efficiencies of the two components and weak photon reabsorption between them. Moreover, the CCT can be tuned from 4750 to 7315 K by changing the repetition frequency of the electrical input.
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