Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 37, Pages 32026-32033Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b07321
Keywords
hierarchical microstructures; TiO2; solar cells; acetic acid; solvothermal; light scattering
Funding
- National Natural Science Foundation of China [21273242, 61404142]
- National High Technology Research and Development Program of China [2015AA050602]
- External Cooperation Program of BIC, Chinese Academy of Sciences [GJHZ1607]
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In this article, hierarchical TiO2 microstructures (HM-TiO2) were synthesized by a simple solvothermal method adopting tetra-n-butyl titanate as the titanium source in a mixed solvent composed of N,N-dimethylformamide and acetic acid. Due to the high crystallinity and superior light scattering ability, the resultant HM-TiO2 are advantageous as photoanodes for dye -sensitized solar cells. When assembled to the entire photovoltaic device with C101 dye as a sensitizer, the pure HM-TiOrbased solar cells showed an ultrahigh photovoltage up to 0.853 V. Finally, by employing the as-obtained HM-TiO2 as the scattering layer and optimizing the architecture of dye -sensitized solar cells, both higher photovoltage and incident photon-to-electron conversion efficiency value were harvested with respect to TiO2 nanoparticles-based dye-sensitized solar cells, resulting in a high power conversion efficiency of 9.79%. This work provides a promising strategy to develop photoanode materials with outstanding photoelectric conversion performance.
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