Preparation of multicolor carbon dots with high fluorescence quantum yield and application in white LED

被引:48
作者
Da, Xianniu [1 ]
Han, Zhaoxia [1 ,2 ]
Yang, Zhijin [1 ]
Zhang, Dawei [1 ,2 ]
Hong, Ruijin [1 ,2 ]
Tao, Chunxian [1 ,2 ]
Lin, Hui [1 ,2 ]
Huang, Yuanshen [1 ,2 ]
机构
[1] Univ Shanghai Sci & Technol, Shanghai Key Lab Modern Opt Syst, Shanghai 200093, Peoples R China
[2] Minist Educ, Engn Res Ctr Opt Instrument & Syst, Beijing, Peoples R China
基金
中国国家自然科学基金;
关键词
Multicolor carbon dots; High quantum yield; White LED; COLOR EMISSION; LUMINESCENCE; ENHANCEMENT; GREEN; RED; PHOSPHORS;
D O I
10.1016/j.cplett.2022.139497
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Using tartaric acid and triammonium citrate as environmentally friendly precursor reactants, multicolor fluorescent carbon dots with adjustable emission wavelength and high quantum yield were successfully synthesized via one-step solvothermal method by only changing the reaction solvent. The morphology, structure and optical properties of the carbon dots were investigated in detail. Characterization results showed that the as-synthesized carbon dots have good dispersibility, rich surface functional groups and high quantum yield (all over 40%). A high-quality white LED with CIE color coordinate (0.34, 0.35) was successfully fabricated using the prepared multicolor carbon dots as the light conversion material. The correlated color temperature was 5336 K, and the color rendering index was up to 83.1. The prepared LED emitted warm white light and was suitable for indoor lighting. It is of great significance to prepare multicolor carbon dots with high quantum yield by single-factor control, and the prepared multicolor carbon dots have potential and broad application prospects in the field of white LED.
引用
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页数:8
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