Electrochromic Properties of Lithium and TiO2 Doped WO3 Films Prepared by Sol-Gel Process

• Main Authors: Chen-Wei Ou, 歐鎮維
• Other Authors: I-Shou Tsai
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/93104027627997827240

碩士 === 逢甲大學 === 紡織工程所 === 93 === In this study, the doped lithium and titanium dioxide solution was prepared by sol-gel method; the tungsten trioxide electrochromic film was deposition by dip coating. In this study we use PEO conducting polymer as an electrolyte to fabricate ECD. By change the lithium and titanium dioxide doped ratio and annealing temperature to explore the effect of electrochromic properties of tungsten trioxide. The electrochromic property of tungsten trioxide electrochromic film was investigated using cyclic voltammetry, Spectrometer and X-ray diffraction. Form the experimental result the sample doped 10mol% lithium and annealing temperature at 250 ℃ has the best △T% at 700 nm is 30. From the CV graph we find doped lithium could increase the ionic transport through the films. The X-ray diffraction graph show the tungsten trioxide will crystallize at 350 ℃. Doped titanium dioxide has no obvious effect in electrochromic properties; from the X-ray diffraction graph doped titanium dioxide could reduce the crystal ability of tungsten trioxide at 350 ℃annealing temperature.