| ZHOU Chao,ZHOU Hui,ZHANG Kai-feng,ZUO Hua-ping,HE Yan-chun,XIONG Yu-qing.Degradation Mechanism of WO3 Film in Electrochromic Device in High Temperature Environment[J],47(5):33-38 |
| Degradation Mechanism of WO3 Film in Electrochromic Device in High Temperature Environment |
| Received:October 28, 2017 Revised:May 20, 2018 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2018.05.006 |
| KeyWord:reflective inorganic all-solid-state films electrochromism WO3 film high temperature environment degradation mechanism |
| Author | Institution |
| ZHOU Chao |
Science and Technology on Vacuum Technology and Physics Laboratory, Lanzhou Institute of Physics CAST, Lanzhou , China |
| ZHOU Hui |
Science and Technology on Vacuum Technology and Physics Laboratory, Lanzhou Institute of Physics CAST, Lanzhou , China |
| ZHANG Kai-feng |
Science and Technology on Vacuum Technology and Physics Laboratory, Lanzhou Institute of Physics CAST, Lanzhou , China |
| ZUO Hua-ping |
Science and Technology on Vacuum Technology and Physics Laboratory, Lanzhou Institute of Physics CAST, Lanzhou , China |
| HE Yan-chun |
Science and Technology on Vacuum Technology and Physics Laboratory, Lanzhou Institute of Physics CAST, Lanzhou , China |
| XIONG Yu-qing |
Science and Technology on Vacuum Technology and Physics Laboratory, Lanzhou Institute of Physics CAST, Lanzhou , China |
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| Abstract: |
| The work aims to study performance degradation mechanism of WO3 film in ITO/WO3/LiTaO3/NiOx/Al reflective inorganic all-solid-state films at high temperature. Electrochromic device and WO3 monolayer film were deposited in the method of DC magnetron sputtering and heated at high temperature. Reflectance variations of the electrochromic device were tested. Microstructure and electrochemical cycle performance of WO3 film were analyzed. The reflectance variation decreased little at temperature below 350 ℃, and decreased obviously at the temperature over 350 ℃. WO3 film transformed from amorphous to crystal structure. The electrochemical cycle characteristic showed that the electrochromic response time extended as heating temperature increased, response time soared and electrochromic property degenerated at the temperature below 350 ℃ while electrochromic stability increased. The porous amorphous structure of WO3 film can provide more injection and transmission routes for ions, electrochromic property is better while cycling stability of porous amorphous structure is worse. Electrochromic property of compact crystal structure is worse since routes are closed and ions (electrons) cannot be injected or transmitted easily, but its cycling stability is better. |
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