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Number of graphene layers as a modulator of the open-circuit voltage of graphene-based solar cell

Cited 66 time in Web of Science Cited 69 time in Scopus
Authors
Ihm, Kyuwook; Lim, Jong Tae; Lee, Kyoung-Jae; Kwon, Jae Wook; Kang, Tai-Hee; Chung, Sukmin; Bae, Sukang; Kim, Jin Ho; Hong, Byung Hee; Yeom, Geun Young
Issue Date
2010-07
Citation
Applied Physics Letters, Vol.97 No.3, p. 032113
Keywords
annealinggraphenephotovoltaic effectssiliconsolar cellswork function
Abstract
Impressive optical properties of graphene have been attracting the interest of researchers, and, recently, the photovoltaic effects of a heterojunction structure embedded with few layer graphene (FLG) have been demonstrated. Here, we show the direct dependence of open-circuit voltage (V-oc) on numbers of graphene layers. After unavoidably adsorbed contaminants were removed from the FLGs, by means of in situ annealing, prepared by layer-by-layer transfer of the chemically grown graphene layer, the work functions of FLGs showed a sequential increase as the graphene layers increase, despite of random interlayer-stacking, resulting in the modulation of photovoltaic behaviors of FLGs/Si interfaces. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3464319]
ISSN
0003-6951
URI
https://hdl.handle.net/10371/172161
DOI
https://doi.org/10.1063/1.3464319
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College of Natural Sciences (자연과학대학)Dept. of Chemistry (화학부)Journal Papers (저널논문_화학부)
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