Effect of Magnetic Field on Photoresponse of Cobalt Integrated Zinc Oxide Nanorods

Boruah, Buddha Deka and Misra, Abha (2016) Effect of Magnetic Field on Photoresponse of Cobalt Integrated Zinc Oxide Nanorods. In: ACS APPLIED MATERIALS & INTERFACES, 8 (7). pp. 4771-4780.

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Abstract

Cobalt integrated zinc oxide nanorod (Co-ZnO NR) array is presented as a novel heterostructure for ultraviolet (UV) photodetector (PD). Defect states in Co-ZnO NRs surface induces an enhancement in photocurrent as compared to pristine ZnO NRs PD. Presented Co-ZnO NRs PD is highly sensitive to external magnetic field that demonstrated 185.7% enhancement in response current. It is concluded that the opposite polarizations of electron and holes in the presence of external magnetic field contribute to effective separation of electron hole pairs that have drifted upon UV illumination. Moreover, Co-ZnO NRs PD shows a faster photodetection speed (1.2 s response time and 7.4 s recovery time) as compared to the pristine ZnO NRs where the response and recovery times are observed as 38 and 195 s, respectively.

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:	zinc oxide; nanorods; cobalt; hybrid heterostructure; photodetector
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	02 Apr 2016 05:44
Last Modified:	02 Apr 2016 05:44
URI:	http://eprints.iisc.ac.in/id/eprint/53591

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