Preparation and Optical Properties Research on Graphene Quantum Dots

摘要：

　　In this work, graphene quantum dots were simply and rapidly prepared by thermal decomposition of citric acid.The resulting graphene quantum dots shows good dispersion and high crystallinity, the sizes can be effectively adjusted by controlling the temperature of decomposition.The results indicate that with the increase of temperature, the size of GQDs increased from 2 nm to 12 nm.The effect of the size of graphene quantum dots on the optical properties were carefully studied.Based on the optical properties and electrochemical results, the HOMO and LUMO value of GQDs with different sizes were obtained and the band gap becomes smaller from 3.36 eV to 2.87 eV with the increase of size of GQDs, which provides a potential application in the field of optoelectronic devices.

关键词： Graphene quantum dots Preparation Optical properties Band gap

作者: Yu-dong Shang Xiu-hua Chen Wen-hui Ma Shao-vuan Li Yue-chun Wang Fu-wei Xiang

作者单位: Faculty of Physical Science and Technology, Yunnan University, Kunming 650091, China National Engineering Laboratory for Vacuum Metallurgy, Faculty of Metallurgical and energy engineeri

会议类型: 国际会议

会议名称: The 2016 China Functional Materials Technology and Industry Forum (2016中国国际功能材料大会暨第九届中国功能材料及其应用学术会议)

会议地点: 重庆

会议语种:英文

页码: 303-308

在线出版日期: 2016-07-25（万方平台首次上网日期，不代表论文的发表时间）