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 journalArticle

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 languageEnglish
Article number067507
JournalJournal of the Electrochemical Society
Volume167
Issue number6
DOIs
Publication statusPublished - 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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