ZnO/Au/ZnO Configuration for High Performance Multiband UV Photo-Detection

Dixit, T and Agrawal, J and Solanke, SV and Ganapathi, KL and Rao, MSR and Singh, V (2019) ZnO/Au/ZnO Configuration for High Performance Multiband UV Photo-Detection. In: IEEE Sensors Letters, 3 (9).

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Abstract

A scalable configuration has been employed to advance the visible blind nature of ZnO-based UV detectors. The device with Au nanoparticles sandwiched between two ZnO layers, i.e., a ZnO/Au/ZnO configuration was found to be suitable for multiband, i.e., UV-A, B, C detection. The device has shown high UV to visible rejection ratio of 1.32 � 103 and UV to NIR rejection ratio of 8.79 � 103 with a photo-responsivity value of 10.64 AW-1 (at λex = 315 nm). The values for photo-detectivity, linear dynamic range, and external quantum efficiency were calculated to be �7.51 � 1012 cmHz1/2W-1, 78 dB and �4170, respectively. It was perceived that insertion of Au plays a noteworthy role in the tuning of photo-responsivity, UV to a visible rejection ratio as well as to make ZnO suitable for multiband UV detection. © 2017 IEEE.

Item Type:	Journal Article
Publication:	IEEE Sensors Letters
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Gold nanoparticles; II-VI semiconductors; Ultraviolet detectors; Zinc oxide, Dipole plasmon; External quantum efficiency; Hot holes; Linear dynamic ranges; Photoresponsivity; Rejection ratios; Solution process; Visible blind, Gold
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	01 Jul 2020 09:51
Last Modified:	01 Jul 2020 09:51
URI:	http://eprints.iisc.ac.in/id/eprint/65139

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