The effect of solution concentration on the physical and electrochemical properties of vanadium oxide films deposited by spray pyrolysis  

作　　者：M.Mousavi A.Kompany N.Shahtahmasebi M.M.Bagheri-Mohagheghi 

机构地区：[1]Department of Physics,Ferdowsi University of Mashhad,Mashhad,Iran [2]Nanoscience Center,Ferdowsi University of Mashhad,Mashhad,Iran [3]School of Physics,Damghan University,Damghan,Iran

出　　处：《Journal of Semiconductors》2013年第10期8-12,共5页半导体学报（英文版）

摘　　要：Vanadium oxide thin films were prepared on glass substrates by using the spray pyrolysis technique. The effect of solution concentration （0.1 M, 0.2 M and 0.3 M ） on the nanostructural, electrical, optical, and electrochromic properties of deposited films were investigated using X-ray diffraction, scanning electron microscopy, UV-vis spectroscopy, and cyclic volta-metrics. The X-ray diffraction shows that only the sample at 0.1 M has a single fl-V205 phase and the others have mixed phases of vanadium oxide. The lowest sheet resistance was obtained for the samples prepared at 0.3 M solution. It was also found that the optical transparency of the samples changes from 70% to 35% and the optical band gap of the samples was in the range of 2.20 to 2.41 eV, depending on the morality of solution. The cycle voltammogram shows that the sample prepared at 0.3 M has one-step electerochoromic but the other samples have two-step electerochoromic. The results show a correlation between the cycle voltammogram and the physical properties of the films.Vanadium oxide thin films were prepared on glass substrates by using the spray pyrolysis technique. The effect of solution concentration （0.1 M, 0.2 M and 0.3 M ） on the nanostructural, electrical, optical, and electrochromic properties of deposited films were investigated using X-ray diffraction, scanning electron microscopy, UV-vis spectroscopy, and cyclic volta-metrics. The X-ray diffraction shows that only the sample at 0.1 M has a single fl-V205 phase and the others have mixed phases of vanadium oxide. The lowest sheet resistance was obtained for the samples prepared at 0.3 M solution. It was also found that the optical transparency of the samples changes from 70% to 35% and the optical band gap of the samples was in the range of 2.20 to 2.41 eV, depending on the morality of solution. The cycle voltammogram shows that the sample prepared at 0.3 M has one-step electerochoromic but the other samples have two-step electerochoromic. The results show a correlation between the cycle voltammogram and the physical properties of the films.

关 键 词：vanadium oxide thin films optical properties cycle voltammogram 

分 类 号：O484.1[理学—固体物理] TH83[理学—物理]