標題: Optical-power-dependent photodesorption kinetics of graphene studied by conductance response
作者: Hsu, Yang-Yang
Lin, Chi-Yuan
Lai, Yi-Chun
Wu, Kun-Rui
Ng, Kwai-Kong
Chang, Chen-Shiung
Chi, Gou Chung
Yu, Pei-Chen
Chien, Forest Shih-Sen
光電工程學系
光電工程研究所
Department of Photonics
Institute of EO Enginerring
公開日期: 1-Jun-2015
摘要: The photodesorption kinetics of graphene with various UV laser power is studied by conductance response. Analytical expressions of the power-dependent photodesorption kinetics of graphene in ambience are derived. The photodesorption time constant tau(d), steady current, and magnitude of modulation current, can be expressed as functions of the adsorption time constant tau(a), desorption cross section sigma, and photon flux density. Under illumination the steady occupation ratio of adsorbed O-2 on graphene is equal to tau(d)/tau(a). It is suggested that the photodesorption of O-2 on graphene is attributed the injection of photogenerated hot electrons and is restricted by the density of antibonding states of O-2. (C) 2015 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.23.014344
http://hdl.handle.net/11536/127907
ISSN: 1094-4087
DOI: 10.1364/OE.23.014344
期刊: OPTICS EXPRESS
Volume: 23
Issue: 11
起始頁: 14344
結束頁: 14350
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