Enhanced electrochromic performance of macroporous WO3 films formed by anodic oxidation of DC-sputtered tungsten layers |
| |
| Authors: | J. Zhang X.H. Xia |
| |
| Affiliation: | State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China |
| |
| Abstract: | Self-organized macroporous tungsten trioxide (WO3) films are obtained by anodic oxidation of DC-sputtered tungsten (W) layers on 10 mm × 25 mm indium tin oxide (ITO)-coated glass. Under optimized experimental conditions, uniformly macroporous WO3 films with a thickness of ca. 350 nm are formed. The film shows a connected network with average pore size of 100 nm and a pore wall thickness of approximately 30 nm. The anodized film becomes transparent after annealing without significant change in macroporous structure. In 0.1 M H2SO4, the macroporous WO3 films show enhanced electrochromic properties with a coloration efficiency of 58 cm2 C−1. Large modulation of transmittance (∼50% at 632.8 nm) and a switching speed of about 8 s are also achieved with this macroporous film. |
| |
| Keywords: | Tungsten oxide Thin films Anodic oxidation Macroporous structure Electrochromism |
| 本文献已被 ScienceDirect 等数据库收录！ |
