Position dependent photodetector from large area reduced graphene oxide thin films

  title={Position dependent photodetector from large area reduced graphene oxide thin films},
  author={Surajit Ghosh and Biddut K. Sarker and Anindarupa Chunder and Lei Zhai and Saiful I. Khondaker},
  journal={Applied Physics Letters},
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… 

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