The emission wavelength dependent photoluminescence lifetime of the N-doped graphene quantum dots

Journal Article · Mon Dec 14 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4937923· OSTI ID:22486231

Deng, Xingxia ^[1]; Sun, Jing; Yang, Siwei; Ding, Guqiao ^[2]; Shen, Hao; Zhou, Wei; Lu, Jian ^[1]; Wang, Zhongyang ^[1]

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1. Research Center of Quantum Macro-Phenomenon and Application, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210 (China)
2. State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China)

Aromatic nitrogen doped graphene quantum dots were investigated by steady-state and time-resolved photoluminescence (PL) techniques. The PL lifetime was found to be dependent on the emission wavelength and coincident with the PL spectrum, which is different from most semiconductor quantum dots and fluorescent dyes. This result shows the synergy and competition between the quantum confinement effect and edge functional groups, which may have the potential to guide the synthesis and expand the applications of graphene quantum dots.

• OSTI ID: 22486231
• Journal Information: Applied Physics Letters, Vol. 107, Issue 24; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CONFINEMENT
DOPED MATERIALS
DYES
FLUORESCENCE
GRAPHENE
LIFETIME
NITROGEN
PHOTOLUMINESCENCE
QUANTUM DOTS
SEMICONDUCTOR MATERIALS
TIME RESOLUTION
WAVELENGTHS