Optical properties of ITO/ZnO Schottky diode with enhanced UV Photoresponse
Journal
Journal of the Korean Physical Society
Journal Volume
67
Journal Issue
10
Pages
1804-1808
Date Issued
2015
Author(s)
Abstract
Photoluminescence (PL) spectra of zinc oxide (ZnO) samples with different hydrogen peroxide (H2O2) treatment durations were measured to examine several point defects on the surfaces of the films. The results suggest successful oxidation through the reaction between oxygen radicals dissociated from H2O2 and the ZnO surface. To further confirm the defect-induced gain mechanism, we fabricated highly transparent indium-tin-oxide (ITO)/ZnO Schottky diodes and measured the key diode characteristics. Photocurrents were measured at different wavelengths, and possible explanations for the high optical gain within the ultraviolet (UV) region are provided. © 2015, The Korean Physical Society.
Subjects
ITO; Photocurrent; Photoluminescence; ZnO
SDGs
Type
journal article