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Enhanced ultraviolet response using graphene electrodes in organic solar cells
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We demonstrate enhanced ultraviolet (UV) response in organic photovoltaic devices using few-layer graphene as the transparent and conducting electrode. This is compared to the same device stack fabricated on a conventional indium tin oxide (ITO) electrode. The enhanced UV response was confirmed by examining the photocurrent spectra over a wide spectral range and is consistent with the excellent UV transmittance of graphene over ITO. The results render the graphene electrode a promising alternative to ITO to enable applications for UV photodetectors or other optoelectronic devices with a wider optical window.
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