Issue 33, 2020

Phase-transition-induced superior ultraviolet photodetection of a ZnO/VO2 bilayer

Abstract

A ZnO/VO2 bilayer film has been successfully grown on a sapphire substrate using pulsed laser deposition (PLD) and magnetron sputtering. The photodetection performance of ZnO is significantly improved across the phase transition temperature of VO2 both in the presence of a bias and zero bias. At a bias of 1 V, the ultraviolet (UV) photoresponsivity is amplified by approximately 32 times from 0.32 A W−1 to 10.07 A W−1 due to the phase transition of VO2. Simultaneously, after the phase transition of VO2, the rise and decay times decrease from 2.49 s and 2.06 s to 0.020 s and 0.032 s, respectively. As for zero-biased performance, the photoresponsivity is also enhanced from 0.53 mA W−1 to 5.56 mA W−1. These results suggest a brand-new mechanism, which can promote the UV photodetection of ZnO via controlling the temperature and provides more degrees of freedom to multifunctional devices.

Graphical abstract: Phase-transition-induced superior ultraviolet photodetection of a ZnO/VO2 bilayer

Supplementary files

Article information

Article type
Paper
Submitted
21 Apr 2020
Accepted
27 May 2020
First published
28 May 2020

J. Mater. Chem. C, 2020,8, 11399-11406

Phase-transition-induced superior ultraviolet photodetection of a ZnO/VO2 bilayer

Y. Xin, L. Hu, S. Ruan, Z. Ye and Y. Zeng, J. Mater. Chem. C, 2020, 8, 11399 DOI: 10.1039/D0TC01944E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements