材料科学
荧光
荧光粉
热液循环
固态
量子点
碳纤维
光电子学
二极管
色温
光化学
固态照明
水热合成
发光二极管
化学工程
光学
复合材料
化学
物理化学
复合数
物理
工程类
作者
Xiaoqian Song,Qianyi Guo,Zhenlu Cai,Jianrong Qiu,Guoping Dong
标识
DOI:10.1016/j.ceramint.2019.05.299
摘要
Carbon quantum dots (CQDs) with multi-color emission are synthesized through hydrothermal method by varying the ratio of citric acid (CA) and urea, the solvent (water, ethyl alcohol, and dimethylformamide), the hydrothermal temperature, and reaction time. The CQDs emit bright fluorescence which can be gradually tuned from blue to red continuously, almost covering the whole visible spectrum. The emission peaks of the CQDs shift from 450 nm to 650 nm with the surface groups and structures changing. Importantly, all solid state [email protected]2 nanophosphors are successfully synthesized by reversed-phase micromulsion method. Based on these solid state phosphors, multi-color [email protected]2 phosphors-based light-emitting diodes (LED) and white light-emitting diode (WLED) with a Commission Internationale de L’ Eclairage (CIE) value of (0.3497, 0.3045) are fabricated in a low-cost, environment-friendly way.
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