Synthesis of Carbon Dots with Multiple Color Emission by Controlled Graphitization and Surface Functionalization

doi:10.1002/adma.201704740

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	Synthesis of Carbon Dots with Multiple Color Emission by Controlled Graphitization and Surface Functionalization
	Miao, X.; Qu, D.; Yang, D. X.; Nie, B.; Zhao, Y. K.; Fan, H. Y.; Sun, Z. C.
	2018
Source Publication	Advanced Materials
ISSN	0935-9648
Volume	30 Issue:1 Pages:8
Abstract	Multiple-color-emissive carbon dots (CDots) have potential applications in various fields such as bioimaging, light-emitting devices, and photocatalysis. The majority of the current CDots to date exhibit excitation-wavelength-dependent emissions with their maximum emission limited at the blue-light region. Here, a synthesis of multiple-color-emission CDots by controlled graphitization and surface function is reported. The CDots are synthesized through controlled thermal pyrolysis of citric acid and urea. By regulating the thermal-pyrolysis temperature and ratio of reactants, the maximum emission of the resulting CDots gradually shifts from blue to red light, covering the entire light spectrum. Specifically, the emission position of the CDots can be tuned from 430 to 630 nm through controlling the extent of graphitization and the amount of surface functional groups, COOH. The relative photoluminescence quantum yields of the CDots with blue, green, and red emission reach up to 52.6%, 35.1%, and 12.9%, respectively. Furthermore, it is demonstrated that the CDots can be uniformly dispersed into epoxy resins and be fabricated as transparent CDots/epoxy composites for multiple-color- and white-light-emitting devices. This research opens a door for developing low-cost CDots as alternative phosphors for light-emitting devices.
Keyword	carbon dots effective conjugation length light-emitting devices multiple-color emission phosphors graphene quantum dots facile access fluorescent mechanism red photocatalyst conversion green Chemistry Science & Technology - Other Topics Materials Science Physics
DOI	10.1002/adma.201704740
Indexed By	SCI ; EI
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Document Type	期刊论文
Identifier	http://ir.ciomp.ac.cn/handle/181722/61171
Collection	中国科学院长春光学精密机械与物理研究所
Recommended Citation GB/T 7714	Miao, X.,Qu, D.,Yang, D. X.,et al. Synthesis of Carbon Dots with Multiple Color Emission by Controlled Graphitization and Surface Functionalization[J]. Advanced Materials,2018,30(1):8.
APA	Miao, X..,Qu, D..,Yang, D. X..,Nie, B..,Zhao, Y. K..,...&Sun, Z. C..(2018).Synthesis of Carbon Dots with Multiple Color Emission by Controlled Graphitization and Surface Functionalization.Advanced Materials,30(1),8.
MLA	Miao, X.,et al."Synthesis of Carbon Dots with Multiple Color Emission by Controlled Graphitization and Surface Functionalization".Advanced Materials 30.1(2018):8.

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中国科学院长春光学精密机械与物理研究所