A study on electrochemical propertied of atmospheric pressure plamas-synthesized flexible TaOxCy film and effects of TaOxCy doping on electrochromic WOxCy thin film.

• Main Authors: Yen-Cheng Chen, 陳彥成
• Other Authors: Yung-Sen Lin
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/83870168065138649594

碩士 === 逢甲大學 === 化學工程學所 === 99 === By the way of Energy crisis and the warm of world-wide get worst seriously, the topic of energy consumption is followed. To find and develop the energy source with the material, and to save energy promotes energy efficiency in many countries.In order to save energy, the electrochromic technology applications have be a focus recently.Owing to the driving markets, the Plastic Substrate has an advantageous position, such as lightweight, thin, flexible and high impact resistance, so the motive of this study is about the flexible electrochromic devices. This study uses the atmospheric pressure plasma polymerization method to utilize monomer W(CO)6 and Ta(OCH2)6 preparation of flexible electrochromic film for tungsten-Tantaium oxide deposited on PET/ITO (Polyethyleneterephthate/Indium Tin Oxide) plastic substrate. Because the advantages of this process are fast and low cost, vacuum equipment and vacuum chambers are not required. Therefore without the need of vacuum chambers, there are no limitations to the size of the substrate dictated by vacuum chambers. This increases the fast thin film coating speed. So this conforms to the industrial requirements to be able to meet mass production condition. Tantalum oxide film has many advantages such as high ionic conductivity and low packing density, high penetration, high dielectric constant, good chemical and thermal stability of the adverse. Tantalum oxide mixed into the tungsten oxide film in order to enhance their optical, electrochemical, electrochromic properties. Study the effects of different operating parameters such as changes in Oxygen flow rate or Ta percent. PET/ITO/WxTa1-xO3, produced by the atmospheric pressure plasma, and probes into the electrochemical properties, optical properties and electrochromic properties by utilizing three methods: the cyclic-voltamogram method, the step method and the UV-VIS spectroscopy method. A Field Emission Scanning Electron Microscope was used to analyze the film thickness and its surface morphology. Moreover, Electron Spectroscopy for Chemical Analysis was applied to the analysis of the chemical configuration in the WxTa1-xO3 thin film. The results of this study prove the successful coating of a fine electrochromic property of tungsten-molybdenum oxide thin film on the PET/ITO plastic substrate by the atmospheric pressure plasma process. The transmittance change can reach to 65% under a wavelength of 550nm, and after 200 cycles of testing by the cyclic-voltamogram method, the WxTa1-xO3 thin film still had good stability.