Position dependent photodetector from large area reduced graphene oxide thin films

Citation data:

Applied Physics Letters, ISSN: 0003-6951, Vol: 96, Issue: 16, Page: 3

Publication Year:
2010
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arXiv Id:
1002.3191
DOI:
10.1063/1.3415499
Repository URL:
http://stars.library.ucf.edu/facultybib2010/181; http://arxiv.org/abs/1002.3191
Author(s):
Ghosh, Surajit; Sarker, Biddut K.; Chunder, Anindarupa; Zhai, Lei; Khondaker, Saiful I.
Publisher(s):
AIP Publishing
Tags:
Physics and Astronomy; TRANSPARENT; REDUCTION; DEVICES; SHEETS; Physics; Applied; Condensed Matter - Mesoscale and Nanoscale Physics
article description
We fabricated large area infrared photodetector devices from thin film of chemically reduced graphene oxide (RGO) sheets and studied their photoresponse as a function of laser position. We found that the photocurrent either increases, decreases, or remain almost zero depending upon the position of the laser spot with respect to the electrodes. The position sensitive photoresponse is explained by Schottky barrier modulation at the RGO film-electrode interface. The time response of the photocurrent is dramatically slower than single sheet of graphene possibly due to disorder from the chemical synthesis and interconnecting sheets. © 2010 American Institute of Physics.