Biologically inspired graphene-chlorophyll phototransistors with high gain
Journal
Carbon
Journal Volume
63
Pages
23-29
Date Issued
2013
Author(s)
Abstract
We present prominent photoresponse of bio-inspired graphene-based phototransistors sensitized with chlorophyll molecules. The hybrid graphene-chlorophyll phototransistors exhibit a high gain of 106 electrons per photon and a high responsivity of 106 A/W, which can be attributed to the integration of high-mobility graphene and the photosensitive chlorophyll molecules. The charge transfer at interface and the photogating effect in the chlorophyll layer can account for the observed photoresponse of the hybrid devices, which is confirmed by the back-gate-tunable photocurrent as well as the thickness and time dependent studies of the photoresponse. The demonstration of the graphene-chlorophyll phototransistors with high gain envisions a viable method to employ biomaterials for graphene-based optoelectronics. © 2013 Elsevier Ltd. All rights reserved.
SDGs
Type
journal article