Programme

P.97 -- Poster, VCTP-45

Date: Wednesday, 14 October 2020

Time: 08:30 - 10:00

Online presentation

Opto-electronic property of Nitrogen doped graphene quantum dots

Nguyen Vo Anh Duy, Thanh Tien Nguyen, Van An Dinh, Minh Triet Dang

(1) Faculty of Science, Cantho University, Cantho, Vietnam (2) Nanotechnology Program, Vietnam-Japan University, National University of Hanoi, Hanoi, Vietnam (3) Center for Atomic and Molecular Technologies, Graduate School of Engineering, Osaka University, Osaka, Japan (4) School of Education, Cantho University, Cantho, Vietnam

Graphene quantum dots (QDs) have been widely studied in recent years due to its unique optical, electrical and optoelectrical properties in applications in solar devices. In this talk, we present the opto-electronic properties of graphene quantum dots (GQDs) and nitrogen doped graphene quantum dots (N-GQDs) using first principles methods. Based on density functional theory (DFT), we investigated the changes of geometry structure, density of states, projected density of states and optical absorption of quantum dots. We have shown that by doping nitrogen to graphene quantum dots, the optical absorption of quantum dots experience a red shift compared to that of the pristine graphene quantum dots. These results opens a new opportunity to develop nanoscale devices using graphene quantum dots in applications in solar devices. Acknowledgement: This research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under grant number 103.01-2018.308

Presenter: Nguyen Vo Anh Duy

Presentation file: