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Single-step fabrication of phase-controllable nanocrystalline TiO2 films for enhanced photoelectrochemical water splitting and dye-sensitized solar cells |
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| Authors: | Chin-Jung LinWen-Kai Tu Chih-Kang Kuo Shu-Hua Chien |
| Affiliation: | a Department of Environmental Engineering, National I-Lan University, Taiwan b Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan c Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan |
| Abstract: | We introduce a single-step procedure for growing a phase-controllable bilayer-structured TiO2 film directly onto transparent conductive oxide glass by precipitation from hydrolysis of TiCl4 in acid solution containing sulfate ions. The obtained bilayer-structured film with anatase nanoparticles in the inner layer which provide high surface area, and an outer layer of larger rutile particles for incident light scattering. In both the water splitting and the dye-sensitized solar cells under AM 1.5 simulated solar light, the bilayer-structured film outperformed the single layer-structured films with either anatase or rutile TiO2 alone by at least 50%. |
| Keywords: | Phase-controllable TiO2 film Single-step fabrication Photoelectrochemical water splitting Dye-sensitized solar cell |
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