Microstructural properties of an electrochromic WO3 thin film

✍ Scribed by Y.A Yang; J.N Yao

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 110 KB
• Volume: 61
• Category: Article
• ISSN: 0022-3697
• DOI: 10.1016/s0022-3697(99)00257-7

✦ Synopsis

This is the first report of extended X-ray absorption of fine structure (EXAFS) study on vacuum-evaporated electrochromic WO 3 thin film. When monoclinic WO 3 powder, the precursor, was evaporated, its long-range order was vigorously destroyed and decomposed into many highly-dispersed clusters. The formed WO 3 film, compared to WO 3 powder, contracted in W-O distance from 0.138 to 0.136 nm (without phase-shift revised). Its lattice cell further decreased if it was cathodically colored in LiClO 4 /propylene carbonate solution. Raman measurement during this change process also strongly supported that conclusion.