Journal
IONICS
Volume 21, Issue 10, Pages 2879-2887Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-015-1471-6
Keywords
Tungsten oxide; Electrochromic; Sol-gel; Annealing
Funding
- Foundation on the Creative Research Team Construction Promotion Project of Beijing Municipal Institutions
- Beijing Municipal Commission of Education Foundation [KM201410005015]
- Rixin Training Support Project of Beijing University of Technology
- Importation and Development of High-Caliber Talents Project of Beijing Municipal Institutions [CITTCD 201504019]
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Tungsten oxide (WO3) films were prepared on indium-tin oxide (ITO) glass by sol-gel method. The influence of annealing temperature on the structural, morphological, optical, electrochemical, and electrochromic properties has been investigated. The film annealed at 250 A degrees C with an amorphous structure exhibits a noticeable electrochromic performance, such as the highest optical modulation of 58.5 % at 550 nm, high electrochemical stability, and excellent reversibility (Q (b)/Q (c) = 96.3 %). An electrochromic (EC) device based on WO3/NiO complementary structure shows improved performance. It exhibits high optical transmittance modulation of 62 % at 550 nm, excellent cycling stability, and relatively fast electrochromic response time (10 s for coloration and 19 s for bleaching).
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