Enhanced Photoresponse in Monolayer Hydrogenated Graphene Photodetector

Gowda, Prarthana and Mohapatra, Dipti R and Misra, Abha (2014) Enhanced Photoresponse in Monolayer Hydrogenated Graphene Photodetector. In: ACS APPLIED MATERIALS & INTERFACES, 6 (19). pp. 16763-16768.

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Abstract

We report the photoresponse of a hydrogenated graphene (H-graphene)-based infrared (IR) photodetector that is 4 times higher than that of pristine graphene. An enhanced photoresponse in H-graphene is attributed to the longer photoinduced carrier lifetime and hence a higher internal quantum efficiency of the device. Moreover, a variation in the angle of incidence of IR radiation demonstrated a nonlinear photoresponse of the detector, which can be attributed to the photon drag effect. However, a linear dependence of the photoresponse is revealed with different incident powers for a given angle of IR incidence. This study presents H-graphene as a tunable photodetector for advanced photoelectronic devices with higher responsivity. In addition, in situ tunability of the graphene bandgap enables achieving a cost-effective technique for developing photodetectors without involving any external treatments.

Item Type:	Journal Article
Publication:	ACS APPLIED MATERIALS & INTERFACES
Publisher:	AMER CHEMICAL SOC
Additional Information:	Copy right for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Keywords:	H-graphene; infrared; photodetectors; angle of incidence; hydrogenation
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics Division of Physical & Mathematical Sciences > Physics
Date Deposited:	20 Nov 2014 04:47
Last Modified:	20 Nov 2014 04:47
URI:	http://eprints.iisc.ac.in/id/eprint/50309

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