Enhanced photoresponse in ZnO nanorod array/p-GaN self-powered ultraviolet photodetectors via coupling with CuO nanostructures

Qiu-Ming Fu; Zhi-Chao Yao; Ji-Liang Peng; Hong-Yang Zhao; Zhi-Bin Ma; Hong Tao; Ya-Fang Tu; Di Zhou; Yu Tian

doi:10.1088/2053-1591/ab66ab

Materials Research Express (Jan 2020)

Enhanced photoresponse in ZnO nanorod array/p-GaN self-powered ultraviolet photodetectors via coupling with CuO nanostructures

Qiu-Ming Fu,
Zhi-Chao Yao,
Ji-Liang Peng,
Hong-Yang Zhao,
Zhi-Bin Ma,
Hong Tao,
Ya-Fang Tu,
Di Zhou,
Yu Tian

Affiliations

Qiu-Ming Fu: ORCiD; Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, and School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, People’s Republic of China
Zhi-Chao Yao: Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, and School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, People’s Republic of China
Ji-Liang Peng: Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, and School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, People’s Republic of China
Hong-Yang Zhao: Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, and School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, People’s Republic of China
Zhi-Bin Ma: Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, and School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, People’s Republic of China; Huanggang Normal University , Huanggang 436100, People’s Republic of China
Hong Tao: Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, and School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, People’s Republic of China
Ya-Fang Tu: ORCiD; Department of Physics, Jianghan University , Wuhan 430056, People’s Republic of China
Di Zhou: Department of Physics, Jianghan University , Wuhan 430056, People’s Republic of China
Yu Tian: Department of Physics, Jianghan University , Wuhan 430056, People’s Republic of China

DOI: https://doi.org/10.1088/2053-1591/ab66ab
Journal volume & issue: Vol. 7, no. 1
p. 015063

Abstract

Read online

ZnO nanorod arrays (ZnO NRAs) coupled with coral-like CuO nanostructures (CuO CLNs) were prepared by low-temperature hydrothermal method. Self-powered ultraviolet (UV) photodetectors (PDs) based on ZnO NRAs/CuO CLNs/p-GaN heterostructure were fabricated via a direct-contact method. Under UV illumination (1.46 mW cm ^−2 ), the ratios of photocurrent to dark current ( I _photo / I _dark ), photo-responsivity and specific detectivity for the ZnO NRAs/CuO CLNs/p-GaN heterojunction self-powered PD were estimated to be 1143, 1.44 mA W ^−1 and 5.9 × 10 ^10 cm H z ^1 /2 /W at 0 V, which were about ∼187, ∼104 and ∼153 times greater than those of the ZnO NRAs/p-GaN self-powered PD, respectively. Moreover, the PD displayed faster response time, excellent stability and repeatability by coupling with CuO CLNs. The mechanism of the enhanced photoresponse performance was discussed through the energy band diagram.

Published in Materials Research Express

ISSN: 2053-1591 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials; Technology: Chemical technology
Website: https://iopscience.iop.org/journal/2053-1591

About the journal

Abstract

Keywords