1. Low-temperature photochemical activation of sol-gel titanium dioxide films for efficient planar heterojunction perovskite solar cells.
- Author
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Huang, Like, Xu, Jie, Sun, Xiaoxiang, Li, Chang, Xu, Rui, Du, Yangyang, Ni, Jian, Cai, Hongkun, Li, Juan, Hu, Ziyang, and Zhang, Jianjun
- Subjects
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PEROVSKITE , *SOLAR cells , *ENERGY consumption , *ELECTRON transport kinetics , *PHOTOVOLTAIC cells - Abstract
To realize high-performance perovskite solar cells (PSCs) ensuring low-cost flexible application with low energy consumption, efficient electron transport layers (ETL) that can be processed at low temperatures are desired. In this contribution, low temperature (about 70 °C) UV/ozone irradiation was applied to synthesis crystallized TiO 2 films as ETL. The UV exposure induces photo-catalytic removal of the organic ligands and spontaneous coalescence of the TiO 2 framework, resulting in excellent TiO 2 films with considerable crystallinity. UV irradiation induces both complete removal of organic media and more efficient charge collection. Accordingly, planar heterojunction (PH) PSCs with such ETL exhibited outstanding photovoltaic performance up to 17.03%, which is even higher than the value (12.98%) of counterpart device with high temperature thermal sintered TiO 2 ETL (without TiCl 4 treatment). These low temperature solution-processed TiO 2 films by facile UV irradiation are suitable for the low-cost, large yield solution process on a flexible substrate for photoelectric devices. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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