期刊
SUPERLATTICES AND MICROSTRUCTURES
卷 113, 期 -, 页码 754-760出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.spmi.2017.12.014
关键词
Copper oxide; CuO; Electron beam evaporation; Photodetector; Responsivity
资金
- University Grants Commission (UGC), New Delhi under SAP CAS-I
- CAS-II
- Department of Science and Technology (DST), New Delhi [IFA-13 PH-61]
- Indian National Science Academy (INSA), New Delhi [IFA-13 PH-61]
The visible light response of Ag-CuO-Ag metal-semiconductor-metal (MSM) photodetector is presented. Electron beam deposited CuO thin films consisted of tightly packed nano crystallites in monoclinic phase. The observed red-shifts in indirect band-gap from 1.09 eV to 0.99 eV and direct band-gap from 2.92 eV to 2.87 eV, with annealing temperature, is attributed to the weak quantum confinement effect. CuO thin films annealed at 500 degrees C have a p-type conductivity of 4.33 x 10(-2) (ohm-cm)(-1) and mobility of 13.2 cm(2)/V-s. Significant responsivities of 0.33 mA/W and 0.59 mA/W for blue and red lights, respectively, in Ag-CuO-Ag photodetector are illustrative for using it as visible light sensor. (C) 2017 Elsevier Ltd. All rights reserved.
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