Effect of elecrtochromic properties on the vanadium pentoxide deoped with nickel by sputter deposition

• Main Authors: JHENG,BAI-JHONG, 鄭百仲
• Other Authors: LIN,TIEN-CHAI
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/cj6kv5

碩士 === 崑山科技大學 === 電機工程研究所 === 104 === In this study, RF sputtering deposition of vanadium pentoxide films on ITO glass substrate, as well as RF magnetron co-sputtering deposition of nickel-doped vanadium pentoxide on the ITO glass substrate film were investigated. The films were obtained by changing process time, argon and oxygen pressure ratio and different annealing temperatures. Then in order to investigate the optical properties between the therefore,the film of vanadium pentoxide and nickel doped vanadium pentoxide doped, compositional analysis and electrochromic properties were be determined by cyclic voltammetry, X-ray diffraction, FE-SEM, UV-visible spectrometer, atomic force microspoic and auger electron spectroscopy. Experimental results indicated that the electrochromic properties show significantly higher than other low-time films manufacturing process at non-oxygen,3hrs process time and film thickness of 288.2nm. The transmittance change between colored and bleached states at a wavelength of 600nm was 25.6% because of a larger circulation area as well as a larger capacity. When the argon and oxygen pressure ratio was 15: 1,the vanadium pentoxide films obtained the best electrochromic properties. The transmittance change between colored and bleached states at a wavelength of 600nm was 43.8%. The films show a significant Redox peaks under cyclic voltammetry analysis. The peaks improves the transmittance difference at colored and bleached states. After the vanadium pentoxide thin films processed through different temperature annealing,the flim is crystallized at 400℃ annealing,however,the film annealed at 300℃ has better electrochromic performance than no annealed. The transmittance change between colored and bleached states at a wavelength of 600nm was 28.7% and the films appear a reduction peak under cyclic voltammetry analysis. Nickel-doped vanadium pentoxide film was deposited at fixed time of 2hr by sputtering. When the doping power is 30W, nature properties of the thin film has a little bit of change. Then when the doping power is above 50W, because nickel content in thin film is more. The effect was deepen the vanadium pentoxide thin film in the anode color. The result indicates that the films change its color form anode coloration turn to cathodic coloration observed from the change of a whole circulation volt-ampere graph. When the doping power was 80W , the best electrochromic properties obtained. The transmittance change between colored and bleached states at a wavelength of 600nm was 35.2%. When the nickel-doped power is 10W, the best film electrochromic properties was gotten at the argon and oxygen pressure ratio of 15:1. Then the transmittance change between colored and bleached states at a wavelength of 600nm was 25.6% and 9.5% retaled to nickel doped vanadium pentoxide and undoped films. That result indicated the doped with a small amount of nickel can actually improve the electrochromic properties of vanadium films.