期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 728, 期 -, 页码 1180-1185出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.09.071
关键词
CuO NWs; CuInO nanocomposites; Core/shell; Pn junction; Photodetector
资金
- Basic Science Research Program of the National Research Foundation of Korea (NRF), - Ministry of Education, Science and Technology [NRF-2015R1A1A1A05027848]
We report on the formation of a pn junction through the use of CuO/Cu1-xInxO core/shell nanowire (NW) structures for application in photodetectors. The CuO NWs arrays were prepared by simple heat-treatment of Cu foil at 500 degrees C in ambient air in a furnace. The Cu1-xInxO nanocomposites synthesized by reflux condensation were drop-casted onto prepared p-CuO NWs arrays to form a core/shell pn junction. Investigation of Cu1-xInxO nanocomposites containing differing amounts of In2O3 (from pure CuO nanocomposites to nanocomposites including 80% In2O3) exhibits the changed electrical polarity that varies from p-type to n-type. Following the formation of the indium tin oxide (ITO) electrode on the Cu1-xInxO shell surface, the observed current-voltage (I-V) curves clearly showed typical rectifying p-n diode characteristics. Our suggested p-n heterojunction yielded a 3.48-fold increase in photocurrent level upon Xe lamp illumination when compared with current in the dark state. Additionally, the fabricated core/shell p-n junction exhibited a photoresponsivity of 0.045 A/W at 374 nm. (C) 2017 Elsevier B.V. All rights reserved.
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