Construction of hydrated tungsten trioxide nanosheet films for efficient electrochromic performance

Tungsten trioxide hydrate (WO3·0.33H2O) films with different morphologies were directly grown on a fluorine doped tin oxide (FTO) substrate. With the directing effect of a seed layer, WO3·0.33H2O thin films composed of nanosheet structures could be selectively synthesized. The effect of urea was also discussed in this paper. The crystal-seed-assisted film grown with urea as a capping agent exhibits efficient electrochromic performances.

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