TITLE

Graphene as a transparent electrode for amorphous silicon-based solar cells

AUTHOR(S)
Vaianella, F.; Rosolen, G.; Maes, B.
PUB. DATE
June 2015
SOURCE
Journal of Applied Physics;6/28/2015, Vol. 117 Issue 24, p243102-1
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The properties of graphene in terms of transparency and conductivity make it an ideal candidate to replace indium tin oxide (ITO) in a transparent conducting electrode. However, graphene is not always as good as ITO for some applications, due to a non-negligible absorption. For amorphous silicon photovoltaics, we have identified a useful case with a graphene-silica front electrode that improves upon ITO. For both electrode technologies, we simulate the weighted absorption in the active layer of planar amorphous silicon-based solar cells with a silver back-reflector. The graphene device shows a significantly increased absorbance compared to ITO-based cells for a large range of silicon thicknesses (34.4% versus 30.9% for a 300 nm thick silicon layer), and this result persists over a wide range of incidence angles.
ACCESSION #
103614605

 

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