Abstract:We demonstrate the integration of large area graphene transparent conductive electrodes in flexible amorphous silicon multispectral (MS) photodetectors (PD). These MS diodes show a bias dependent maxi...We demonstrate the integration of large area graphene transparent conductive electrodes in flexible amorphous silicon multispectral (MS) photodetectors (PD). These MS diodes show a bias dependent maximum of their spectral response between the ultraviolet (UV) and visual wavelength range. This ability to shift the response maximum by external bias without the use of filter-structures and the possibility to deposit the device structure directly onto flexible polyimide substrates gives these sensors wide applicability as one-pixel color detectors. Graphene MS PDs show an extended detection range well into the UV when compared to rigid devices with aluminum doped zinc oxide electrodes. The integration of bi-layer graphene contacts boosts the maximum spectral response up to 185 mAW <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> , which is an improvement of 150 % compared to sensors with just one atom thick graphene contacts.Read More
Publication Year: 2016
Publication Date: 2016-09-01
Language: en
Type: article
Indexed In: ['crossref']
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