IMPROVEMENT IN THERMAL DEGRADATION OF <font>ZnO</font> PHOTODETECTOR BY EMBEDDING SILVER OXIDE NANOPARTICLES

Abstract

The degraded performance of annealed ZnO -based photodetector can be improved by embedding an Ag interlayer. The Ag interlay converted to Ag 2 O during ZnO deposition. After Ag 2 O nanoparticles formed, the interface between ZnO and Ag 2 O produced band-bending to redistribute charges and increase the Schottky barrier between the electrical contact and ZnO . The excess Ag interlayer created lattice defects, causing the dark current to increase slightly. The increasing visible PL intensity of annealed ZnO , with the increasing Ag interlayer, clarified the transfer of the photo-generated electron.