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Efficient full-color emitting carbon-dot-based composite phosphors by chemical dispersion
M. Y. Sun,Y. Han,X. Yuan,P. T. Jing,L. Zhang,J. L. Zhao and Y. J. Zheng
2020
Source PublicationNanoscale
ISSN2040-3364
Volume12Issue:29Pages:15823-15831
AbstractRealizing full-color emission plays a key role in exploring the luminescence mechanisms of carbon dots (CDots) and promoting the applications of CDots in light-emitting diodes (LEDs). Herein, a synthesis strategy for full-color emitting CDots was developed through the solvothermal reaction of citric acid and urea with a constant mass ratio but varying reactant concentrations in solvent. With the reactant concentrations increasing, a dual regulation mechanism including an enhanced nucleation growth process and subsequently increased C=O/C=N-related surface states should be responsible for the photoluminescence (PL) shift of CDots from blue to red. Relying on the hydrolyzation and condensation processes of 3-aminopropyltrimethoxysilane, a simple and universal method was developed by chemically dispersing the CDots into a cross-linked silica network on the surface of SiO(2)nanoparticles to produce efficient full-color emitting SiO2/CDot composite phosphors with considerable PL quantum yields in the range of 30-60%. It was proved that the full-color emitting SiO2/CDot composite phosphors could be flexibly applied in packaging white LEDs, releasing pure white light at the Commission Internationale de L'Eclairage (CIE) coordinates of (0.33, 0.33) with a color rendering index (CRI) of 80.4 and a high color-rendering white light coming entirely from CDots with the CIE coordinates of (0.34, 0.36) and a CRI of 97.4, indicating promising application of the full-color emitting SiO2/CDot composite phosphors in the LED field.
DOI10.1039/d0nr02021d
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Indexed BySCI ; EI
Language英语
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Document Type期刊论文
Identifierhttp://ir.ciomp.ac.cn/handle/181722/64482
Collection中国科学院长春光学精密机械与物理研究所
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GB/T 7714
M. Y. Sun,Y. Han,X. Yuan,P. T. Jing,L. Zhang,J. L. Zhao and Y. J. Zheng. Efficient full-color emitting carbon-dot-based composite phosphors by chemical dispersion[J]. Nanoscale,2020,12(29):15823-15831.
APA M. Y. Sun,Y. Han,X. Yuan,P. T. Jing,L. Zhang,J. L. Zhao and Y. J. Zheng.(2020).Efficient full-color emitting carbon-dot-based composite phosphors by chemical dispersion.Nanoscale,12(29),15823-15831.
MLA M. Y. Sun,Y. Han,X. Yuan,P. T. Jing,L. Zhang,J. L. Zhao and Y. J. Zheng."Efficient full-color emitting carbon-dot-based composite phosphors by chemical dispersion".Nanoscale 12.29(2020):15823-15831.
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