Temperature dependence of the interband transition in a V2O5 film

• DOI: 10.1063/1.4808021
• Publication Date: 2013-05-23T22:14:50Z
• Authors: Manil Kang; Sok Won Kim; Younghun Hwang; Youngho Um; Ji-Wook Ryu
• Keywords: Physics; QC1-999; 02 engineering and technology; 0210 nano-technology

The temperature dependence of the interband transition in an α-V2O5 film was investigated using absorption and photoluminescence spectral measurements at a temperature range of 10–300 K. Transmission measurements in the experimental temperature range indicate that the α-V2O5 film has two distinct interband transitions, implying indirect and direct transitions. This result was confirmed by spectroscopic ellipsometry. The blue shift of both the transitions in the α-V2O5 film with decreasing temperature was explained by a reduction in the lattice-dilatation effect and the electron-phonon interaction. The PL measurements in the experimental temperature range showed that the emission near 530 nm is due to the indirect transition in the α-V2O5 film.