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Hybrid transparent conductive films of multilayer graphene and metal grid for organic photovoltaics

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Title
Hybrid transparent conductive films of multilayer graphene and metal grid for organic photovoltaics
Author
Kim, Sung ManWalker, BrightSeo, Jung HwaKang, Seong Jun
Issue Date
201312
Publisher
JAPAN SOC APPLIED PHYSICS
Citation
JAPANESE JOURNAL OF APPLIED PHYSICS, v.52, no.12, pp.125103 -
Abstract
Organic solar cells (OSCs) were fabricated on hybrid transparent conductive films consisting of multilayer graphene (MLG) and metal grids. MLG was transferred onto Ag grids to form hybrid transparent conductive films. The optical transmittance was found to be 87% at a wavelength of 550 nm, while the sheet resistance was measured to be 28 ± 7:9Ω/square. The device characteristics of OSCs prepared on the hybrid films include an open circuit voltage of 0.58 V, a short circuit current of 8.05 mA/cm2, a fill factor of 51%, and a power conversion efficiency (PCE) of 2.38%. The PCE shows 11% improvement compared with that of OSCs fabricated using MLG films without Ag grids. This improvement can be attributed to the reduced sheet resistance of the hybrid film. These results indicate that hybrid films comprising MLG deposited on Ag grids constitute a promising transparent electrode for improving performance in OSCs.
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DOI
http://dx.doi.org/10.7567/JJAP.52.125103
ISSN
0021-4922
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