Fast-Response and Self-Powered Cu2O/ZnO Nanorods Heterojunction UV-Visible (570 nm) Photodetectors

Hsueh Pin Lin; Po Yi Lin; Dung Ching Perng

doi:10.1149/1945-7111/ab7e8e

Fast-Response and Self-Powered Cu₂O/ZnO Nanorods Heterojunction UV-Visible (570 nm) Photodetectors

Hsueh Pin Lin
, Po Yi Lin
, Dung Ching Perng

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

A fast, self-powered photodetector (PD) capable of UV to visible (570 nm) sensing based on the p-Cu₂O/n-ZnO nanorods (NRs) heterostructure is reported. The PD shows a spectral response range from 380 nm to 570 nm, which is suitable for ambient light sensing applications. The PD exhibits good rectifying characteristics with a low leakage current and a low turn-on voltage of ∼0.3 V. The responsivities of the self-powered PD are 0.24 A W^-1 and 0.06 A W^-1 at 380 and 450 nm, respectively. The rise/recovery time of the PD are 0.02/0.03 s and 0.01/0.02 s for UV (370 nm) and visible light (450 nm), respectively. Upon UV light illumination, the long, persistent photocurrent (or recovery time) caused by ZnO NRs can be eliminated using the self-powered mode.

Original language	English
Article number	067507
Journal	Journal of the Electrochemical Society
Volume	167
Issue number	6
DOIs	https://doi.org/10.1149/1945-7111/ab7e8e
Publication status	Published - 2020 Jan 4

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1149/1945-7111/ab7e8e

Cite this

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abstract = "A fast, self-powered photodetector (PD) capable of UV to visible (570 nm) sensing based on the p-Cu2O/n-ZnO nanorods (NRs) heterostructure is reported. The PD shows a spectral response range from 380 nm to 570 nm, which is suitable for ambient light sensing applications. The PD exhibits good rectifying characteristics with a low leakage current and a low turn-on voltage of ∼0.3 V. The responsivities of the self-powered PD are 0.24 A W-1 and 0.06 A W-1 at 380 and 450 nm, respectively. The rise/recovery time of the PD are 0.02/0.03 s and 0.01/0.02 s for UV (370 nm) and visible light (450 nm), respectively. Upon UV light illumination, the long, persistent photocurrent (or recovery time) caused by ZnO NRs can be eliminated using the self-powered mode.",

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