Nest-like WO3?0.33H2O film can be prepared on a FTO conductive glass substrate by self-seeding hydrothermal method. Such hydrothermal method eliminates the blocking of electrons by the dense seed layer and improves the electron transport speed and electron transport efficiency.
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Therefore, the hydrate tungsten trioxide film prepared by self-seeding hydrothermal method exhibits a faster response speed, a larger light modulation range, and a higher coloring efficiency than the WO3 thin film prepared by the seed-assisted hydrothermal method. And the cycle stability of film prepared by the former method is not affected. The light modulation range is increased by 27% at ±0.5V, the coloring time is shortened by 28%, and the coloring efficiency is 126.3cm2/C. In addition, the experts discussed the growth mechanism of the self-seeding hydrothermal method, and proposed the multi-step growth mechanism of the self-seeding-nanoband-nanosheets. And the effect of ethylene glycol on the growth morphology of the films was studied by adjusting the solvent composition.
