荧光
材料科学
碳纤维
发光二极管
二极管
水溶液
分析化学(期刊)
纳米技术
光化学
光电子学
化学
光学
色谱法
物理
有机化学
复合数
复合材料
作者
Lixia Zhao,Dong Zhang,Xin Wang,Yang Li,Z. Li,Hua Wei,Boxuan Yao,Gongtao Ding,Zifan Wang
出处
期刊:Molecules
[MDPI AG]
日期:2023-08-07
卷期号:28 (15): 5917-5917
标识
DOI:10.3390/molecules28155917
摘要
The emergence and fast development of carbon dots (CDs) provide an unprecedented opportunity for applications in the field of photoelectricity, but their practicability still suffers from complicated synthesis procedures and the substrate dependence of solid-state fluorescence. In this study, we design a unique microwave-assisted solid-phase synthesis route for preparing tunable fluorescent CD powders with yellow, orange, and red fluorescence (Y-CDs, O-CDs, R-CDs) by simply adjusting the mass ratio of reactants, a method which is suitable for the large-scale synthesis of CDs. The Y-/O-/R-CDs were systematically characterized using physics and spectroscopy techniques. Based on the perfect solid-state fluorescence performance of the proposed fluorescent CD powders, the Y-/O-/R-CDs were successfully applied for the construction of multi-color and white light-emitting diode devices at low cost. Furthermore, the Y-CDs displayed much higher yield and luminous efficiency than the O-CDs and R-CDs and were further used for fingerprint identification on the surfaces of glass sheets and tinfoil. In addition, the R-CD aqueous solution fluorescence is sensitive to pH, suggesting its use as a pH indicator for monitoring intracellular pH fluctuations. The proposed series of fluorescent powders composed of CDs may herald a new era in the application of optical components and criminal investigation fields.
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