Abstract
Vanadium pentoxide (V
2O
5) thin films have been prepared by spray pyrolysis technique. The influence of solution molarity on the characteristics of the V
2O
5 has been investigated. X-ray diffraction analysis (XRD) showed that, the films deposited at ≥0.1
M were orthorhombic structure with a preferential orientation along 〈0
0
1〉 direction. Moreover, the crystallinity was improved by increasing solution molarity. The microstructure parameters have been evaluated by using a single order Voigt profile method. The optical band gaps, determined by using Tauc plot, have been found to be 2.50
±
0.02 and 2.33
±
0.02
eV for the direct and indirect allowed transition, respectively. Also the complex optical constants for the wavelength range 300–2500
nm are reported. At room temperature, the dark conductivity as a function of solution molarity showed the range of 5.74
×
10
−2
±
0.03 to 3.36
×
10
−1
±
0.02
Ω
−1
cm
−1. While at high temperature, the behaviour of electrical conductivity dominated by grain boundaries. The values of activation energy and potential barrier height were 0.156
±
0.011 and 0.263
±
0.012
eV, respectively.