Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 133, Issue 2-3, Pages 834-838Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2012.01.103
Keywords
Semiconductors; Chemical synthesis; Electrochemical techniques; Heterostructures
Categories
Funding
- National Natural Science Foundation of China [21173103, 51172090]
- Science and Technology Developing Funding of Jilin Province [201115012]
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The photoelectric properties of ZnO microspheres, ZnO/Ag2S heterogeneous microspheres and Ag2S hollow microspheres were investigated systematically by surface photovoltage, transient photovoltage and surface photocurrent techniques. The ZnO/Ag2S heterostructure shows superior photoelectric properties in visible-light region compared with pure Ag2S. Transient photovoltage results reveal the separation processes of photo-generated charge carriers in the samples. The photoelectric ethanol sensing property induced by visible light for the ZnO/Ag2S heterostructure has been found, which should be valuable for the practical application of semiconductor gas sensors at room temperature. (C) 2012 Elsevier B.V. All rights reserved.
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