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Metals
Photoconductivities of nanocrystalline vanadium pentoxide thin film grown by plasma RF magnetron sputtering at the different condition of deposition
M. K. Khalafa, N. K. Hassanb, A. I. Khudiara, I. K. Salmanb a Center of Applied Physics, Directorate of Materials Research, Ministry of Sciense and Technology,
Baghdad, Iraq
b Dept. of Physics, College of Science, University of Tikrit,
Baghdad, Iraq
Abstract:
In this study, the fabrication and characterization of a metal–semiconductor–metal (MSM) visible photodetector based on V$_{2}$O$_{5}$ were investigated. The V$_{2}$O$_{5}$ thin film was synthesized on n-type Si (100) as substrate by plasma RF-sputtering. The photoconductivity of the nanocrystalline vanadium pentoxide (V$_{2}$O$_{5}$|Si) was investigated at the different conditions of deposition (i. e. RF-sputtering power, pressure, and substrate temperature). The photoconductivity measurement of this work was performed in the darkness and under illumination, with applied voltage from a range of 0.1–10 V and illumination intensity 9.8 mW/cm$^{2}$. I–V characteristics under illumination showed that the films prepared from V$_{2}$O$_{5}$ on the basis of n-Si have good efficiency and the best is at power 150 W, pressure 0.03 Torr, and temperature 473 K. The fabricated photoconductive detector showed the spectral response $(R_{\lambda})$ value of 0.0783 AW$^{-1}$, quantum efficiency 18.04%, spectral detectivity $D^{*}$ = 6.984 $\cdot$ 10$^{9}$ cm $\cdot$ Hz$^{1/2}$ $\cdot$ W$^{-1}$ at wavelength 600 nm, and low spectral responsivity in the UV region.
Keywords:
vanadium pentoxide, photoconductivity, physical vapour deposition, plasma RF-sputtering.
Received: 29.07.2019 Revised: 05.08.2019 Accepted: 03.09.2019
Citation:
M. K. Khalaf, N. K. Hassan, A. I. Khudiar, I. K. Salman, “Photoconductivities of nanocrystalline vanadium pentoxide thin film grown by plasma RF magnetron sputtering at the different condition of deposition”, Fizika Tverdogo Tela, 62:1 (2020), 69; Phys. Solid State, 62:1 (2020), 74–82
Linking options:
https://www.mathnet.ru/eng/ftt8519 https://www.mathnet.ru/eng/ftt/v62/i1/p69
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