Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 178, Issue 16, Pages 1068-1075Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mseb.2013.06.015
Keywords
Zinc oxide; Transition metal doped zinc oxide; Chemical solution deposition; Photoresponse study
Funding
- Science and Engineering Research Board (SERB-DST, India) under Fast Track Project scheme
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The synthesis, characterization and photoresponse studies of undoped and transition metal doped zinc oxide thin films are carried out in this work, in prospect of visible light photo detection and sensor applications. The undoped and transition metal ions such as, Co, Ni and Mn doped ZnO films in this study were synthesized by chemical solution deposition, involving spin-coating. We have characterized the deposited films using X-ray diffraction, scanning electron microscopy, photoluminescence and UV-vis spectroscopy studies. The devices of the films for photoresponse study were fabricated by top Ag contacts on the film surface in metal-semiconductor-metal configuration. The current-voltage characteristics and switching measurements of these devices were studied under the illumination of an incandescent lamp. We found a high ON/OFF ratio of 8 and highest photocurrent density of 0.7 mA/cm(2) for Ni doped ZnO film. (c) 2013 Elsevier B.V. All rights reserved.
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