Multicolour light emission from chlorine-doped graphene quantum dots

被引:151
|
作者
Li, Xueming [1 ]
Lau, Shu Ping [2 ]
Tang, Libin [2 ,3 ]
Ji, Rongbin [3 ]
Yang, Peizhi [1 ]
机构
[1] Yunnan Normal Univ, Solar Energy Res Inst, Kunming 650092, Peoples R China
[2] Hong Kong Polytech Univ, Dept Appl Phys, Hong Kong, Hong Kong, Peoples R China
[3] Kunming Inst Phys, Kunming 650223, Peoples R China
基金
中国国家自然科学基金;
关键词
PHOTOLUMINESCENCE; CONVERSION; AVENUE; BLUE;
D O I
10.1039/c3tc31473a
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Multicolour emission is realized in chlorine-doped GQDs (Cl-GQDs) prepared by a facile hydrothermal method using fructose and hydrochloric acid as source materials. The average diameter of a Cl-GQD is about 5.4 nm with 2 at.% Cl. The emission colour of the Cl-GQDs can be tuned successively from blue to white, orange, green and red simply by varying the excitation wavelength between 300 and 600 nm. The multicolour emission from the Cl-GQDs can be attributed to Cl doping, which introduces additional energy levels between C pi and C pi*. The multicolour Cl-GQDs should find applications in bioimaging and optoelectronic devices.
引用
收藏
页码:7308 / 7313
页数:6
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