Reduced graphene oxide film based highly responsive infrared detector

Khan, Mustaque A and Nanda, Karuna K and Krupanidhi, Saluru B (2017) Reduced graphene oxide film based highly responsive infrared detector. In: MATERIALS RESEARCH EXPRESS, 4 (8).

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Abstract

Due to the unique optical properties, graphene can effectively be used for the detection of infrared light. In this regard, reduced graphene oxide (RGO) has drawn considerable attention in scientific society because of simplicity of preparation and tunable properties. Here, we report the synthesis of RGO by solvothermal reduction of graphene oxide (GO) in ethanol and the detection of infrared light (1064 and 1550 nm) with metal-RGO-metal configuration. We have observed that photocurrent, responsivity as well as the external quantum efficiency increase with C/O ratio. The responsivity value in near-infrared region can be as high as 1.34 A.W-1 and the external quantum efficiency is more than 100%. Response times of these devices are in the order of few seconds. Overall, the responsivity of our device is found to be better than many of the already reported values where graphene or reduced graphene oxide is the only active material. The high value of quantum efficiency is due to strong light absorption and the presence of mid-gap states band in RGOs.

Item Type:	Journal Article
Publication:	MATERIALS RESEARCH EXPRESS
Additional Information:	Copy right for this article belongs to the IOP PUBLISHING LTD, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	09 Sep 2017 04:38
Last Modified:	09 Sep 2017 04:38
URI:	http://eprints.iisc.ac.in/id/eprint/57767

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