Synthesis of white-light-emitting graphene quantum dots via a one-step   reduction and their interfacial characteristics-dependent luminescence   properties

doi:10.1039/c6qi00587j

CORC > 北京大学 > 化学与分子工程学院

	Synthesis of white-light-emitting graphene quantum dots via a one-step reduction and their interfacial characteristics-dependent luminescence properties
	Dong, Pei ; Jiang, Bang-Ping ; Liang, Wen-Qian ; Huang, Yong ; Shi, Zujin ; Shen, Xing-Can
刊名	INORGANIC CHEMISTRY FRONTIERS
	2017
关键词	CARBON DOTS PHOTOLUMINESCENCE EMISSION NANODOTS DEFECTS DIODES OXIDE
DOI	10.1039/c6qi00587j
英文摘要	Graphene quantum dots (GQDs) have attracted great attention because of their possible applications in various fields. Here we report a facile one-step method for the fabrication of a type of white-light-emitting GQD (W-GQD) by NaBH4 reduction. The highly-pure white-light emission of the obtained W-GQDs was confirmed by calculating the Commission International de l'Eclarirage (CIE) 1931 chromaticity parameters (x = 0.30, 0.36) from the fluorescence luminescence data. We observed an important increase in the absolute quantum yield from 0.20% to 3.62% before and after the chemical reduction. The influence of the interface characteristics on the emission properties was analyzed by UV-vis, Fourier transform infrared, and X-ray photoelectron spectroscopies. The results illustrated that the carboxyl and epoxy groups were reduced into hydroxyl groups and that the five-and six-membered lactol groups transformed into aromatic carboxylic acid and hydroxyl groups. The chemical modifications enhanced the electron density of the pi structure and also suppressed the non-radiative recombination, resulting in a bright white-light emission. Furthermore, the as-prepared W-GQDs were successfully utilized for the fabrication of a white-light-emitting diode.; Natural Science Foundation of China [21671046, 21161003, 21364002, 21502028, 51562001]; Guangxi Natural Science Foundation of China [2013GXNSFGA019001, 2012GXNSFDA053007, 2015GX NSFAA139037]; Program for New Century Excellent Talents in University of the Ministry of Education [NCET-13-0743]; Open-End fund of Beijing National Laboratory for Molecular Sciences; Program for New Century National Hundred, Thousand and Ten Thousand Talent Project of Guangxi; State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources [CMEMR2015-A02, CMEMR2013-A08, CMEMR2013-A013]; SCI(E); ARTICLE; 4; 712-718; 4
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/474294]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Dong, Pei,Jiang, Bang-Ping,Liang, Wen-Qian,et al. Synthesis of white-light-emitting graphene quantum dots via a one-step reduction and their interfacial characteristics-dependent luminescence properties[J]. INORGANIC CHEMISTRY FRONTIERS,2017.
APA	Dong, Pei,Jiang, Bang-Ping,Liang, Wen-Qian,Huang, Yong,Shi, Zujin,&Shen, Xing-Can.(2017).Synthesis of white-light-emitting graphene quantum dots via a one-step reduction and their interfacial characteristics-dependent luminescence properties.INORGANIC CHEMISTRY FRONTIERS.
MLA	Dong, Pei,et al."Synthesis of white-light-emitting graphene quantum dots via a one-step reduction and their interfacial characteristics-dependent luminescence properties".INORGANIC CHEMISTRY FRONTIERS (2017).