Solvothermally grown WO3·H2O film and annealed WO3 film for wide-spectrum tunable electrochromic applications |
| |
| Affiliation: | 1. School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, 200093, China;2. School of Energy and Materials, Shanghai Thermophysical Properties Big Data Professional Technical Service Platform, Shanghai Engineering Research Center of Advanced Thermal Functional Materials, Shanghai Key Laboratory of Engineering Materials Application and Evaluation, Shanghai Polytechnic University, Shanghai, 201209, China;1. Materials Science Lab. (1), Physics Department, Faculty of Science, Cairo University, Giza, Egypt;2. Department of Physics, College of Sciences and Humanities, Shaqra University, Al Quwayiyah, 19257, Saudi Arabia;3. Department of Physics, Faculty of Applied Science, Umm AlQura University, AlZahir Branch, Makkah, 24383, Saudi Arabia;1. Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China;2. University of Chinese Academy of Sciences, Beijing, 100049, China;3. Center for Excellence in Ultra-intense Laser Science, Chinese Academy of Sciences, Shanghai, 201800, China;4. Shanghai Academy of Spaceflight Technology, Shanghai, 201109, China;1. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China;2. AVIC Chengdu Aircraft Industrial (Group) Co., Ltd., Chengdu, China;1. National Engineering Research Center for Green Recycling of Strategic Metal Resource, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China;2. College of Metallurgy and Energy Engineering University Department, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China;3. Ganjiang Innovation Research Institute, Chinese Academy of Sciences, Ganzhou, 341119, Jiangxi, PR China;4. School of Electronic Information and Electrical Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160, China;1. School of Materials Science and Engineering, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, Shaanxi, 710049, China;2. National Institute Corporation of Additive Manufacturin, Xi’an, Shaanxi, 710117, China;3. Center for Advanced Ceramics School of Materials Science and Engineering, Anhui Polytechnic University, Wuhu, Anhui, 241000, China |
| |
| Abstract: | Tungsten trioxide (WO3) is a classical electrochromic (EC) material with advantages of abundant reserves, high coloration efficiency and cyclic stability. However, WO3 films are often accompanied by a narrow spectrum of modulation due to a single-color change from transparent to blue. In this work, we report a wide-spectrum tunable WO3·H2O nanosheets EC film solvothermally grown on fluorine-doped tin oxide (FTO) glass. Interestingly, the crystalline WO3·H2O nanosheets film is transformed into amorphous WO3 after annealing at 250 °C for 1 h. The amorphous film can be transformed into crystalline WO3 film by increasing the annealing temperature to 450 °C. After annealing at 250 °C, the WO3 film exhibits an optical modulation of 75.8% in a broad solar spectrum range of 380–1400 nm and blocks 88.9% of solar irradiance. Fast switching responses of 4.9 s for coloration and 6.0 s for bleaching, and a coloration efficiency of 86.4 cm2 C−1 are also achieved. Additionally, the WO3 film annealed at 250 °C also demonstrates an excellent cyclic stability, where 99.6% of the initial optical modulation can be retained after 1500 cycles. This simple and mild solvothermal method used in this work provides a new idea for the preparation of wide-spectrum tunable WO3 EC films. |
| |
| Keywords: | Tungsten trioxide Electrochromic Wide-spectrum Solvothermal |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
