Journal
CHEMICAL COMMUNICATIONS
Volume 53, Issue 79, Pages 10882-10885Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cc01104k
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Funding
- Fundamental Research Funds for the Central Universities [2013121031]
- UCL BEAMS through EPSRC [EP/P511262/1]
- China Scholarship Council
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A facile aqueous-based fabrication scheme is developed for producing annealing-free anatase TiO2 (AF-TiO2) films that exhibit efficient electron transport properties in planar heterojunction perovskite solar cells (PSCs). AF-TiO2 films are fabricated by spin coating on a substrate a colloidal solution of anatase TiO2 nanoparticles (NPs) prepared via a low temperature hydrolytic sol-gel method. The resultant AF-TiO2 films show low electrical resistance, high transmittance in the visible and near-infrared regions and facilitation of high-quality perovskite film formation, which can be attributed to their homogeneous surface morphology and nanocrystallinity. The AF-TiO2 based PSCs achieve a power conversion efficiency (PCE) of 18.29 +/- 0.18%, showing significant improvement compared to the control PSCs (PCE = 11.33 +/- 0.32%) based on TiO2 films made by high-temperature annealing of amorphous TiO2 (HTA-TiO2).
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