An Efficient Synthesis and Photoelectric Properties of Green Carbon Quantum Dots with High Fluorescent Quantum Yield
An Efficient Synthesis and Photoelectric Properties of Green Carbon Quantum Dots with High Fluorescent Quantum Yield
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高荧光量子产率绿色碳量子点的高效合成及其光电性能
DOI：
10.3390/nano10010082
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发表时间：
2020-01
期刊：
影响因子：
5.3
通讯作者：
Xu Bingshe
中科院分区：
文献类型：
--
作者：
Zheng Jingxia;Xie Yanting;Wei Yingying;Yang Yongzhen;Liu Xuguang;Chen Yongkang;Xu Bingshe
为了大大提高碳量子点的生产质量和效率，为大规模生产高质量的碳量子点提供新的途径，本研究以2，7-二羟基萘为碳源，乙二胺为氮掺杂，采用高效的一步溶剂热法合成了高产率(PY)和高荧光量子产率(QY)的绿色碳量子点。通过调节乙二胺的加入量、反应温度和反应时间等反应参数，优化了g-CQD的PY和QY。结果表明，当乙二胺的加入量为4mL，反应温度为180℃，反应时间为12h时，g-CQD的PY和QY值最大，分别为70.90%和62.98%。利用优化后的g-CQD的QY值，将g-CQD与蓝筹相结合，制备出白光发光二极管(白色LED)。白光LED的显色指数达到87，相关色温为2520K，属于暖白光区域，适合室内照明。这些结果表明g-CQD在白光LED领域具有潜在的应用前景。
To greatly improve the production quality and efficiency of carbon quantum dots (CQDs), and provide a new approach for the large-scale production of high-quality CQDs, green carbon quantum dots (g-CQDs) with high product yield (PY) and high fluorescent quantum yield (QY) were synthesized by an efficient one-step solvothermal method with 2,7-dihydroxynaphthalene as the carbon source and ethylenediamine as the nitrogen dopant in this study. The PY and QY of g-CQDs were optimised by adjusting reaction parameters such as an amount of added ethylenediamine, reaction temperature, and reaction duration. The results showed that the maximum PY and QY values of g-CQDs were achieved, which were 70.90% and 62.98%, respectively when the amount of added ethylenediamine, reaction temperature, and reaction duration were 4 mL, 180 °C, and 12 h, respectively. With the optimised QY value of g-CQDs, white light emitting diodes (white LEDs) were prepared by combining g-CQDs and blue chip. The colour rendering index of white LEDs reached 87, and the correlated colour temperature was 2520 K, which belongs to the warm white light area and is suitable for indoor lighting. These results indicate that g-CQDs have potential and wide application prospects in the field of white LEDs.
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