Abstract
We have developed a facile, fast, and one-step synthetic method to prepare graphene quantum dots (GQDs) simultaneously with nitrogen (N) doping via pulsed laser ablation. The N-doped GQDs (N-GQDs) with an average size around 3 nm and an N/C atomic ratio of 33% have been obtained. The N-GQDs emit blue photoluminescence (PL), where the PL intensity enhances as the N doping increases. The PL enhancement for the N-GQDs with a factor as high as 25 has been achieved as compared to GQDs. The origin of the PL enhancement in GQDs after N doping is attributed to the increased densities of pyridinic and graphitic N.
© 2017 Optical Society of America
Full Article | PDF ArticleMore Like This
Sukhyun Kang, Young Kyu Jeong, Kyung Hwan Jung, Yong Son, Won Rae Kim, Jeong Ho Ryu, and Kang Min Kim
Opt. Express 28(15) 21659-21667 (2020)
Hui-Chen Yeh and Szu-Wei Lee
Opt. Express 25(2) 1444-1451 (2017)
Kaushik Roy-Choudhury and Stephen Hughes
Opt. Lett. 40(8) 1838-1841 (2015)