Compact SnO<sub>2</sub>/Mesoporous TiO<sub>2</sub> Bilayer Electron Transport Layer for Perovskite Solar Cells Fabricated at Low Process Temperature
Charge transport layers have been found to be crucial for high-performance perovskite solar cells (PSCs). SnO<sub>2</sub> has been extensively investigated as an alternative material for the traditional TiO<sub>2</sub> electron transport layer (ETL). The challenges facing the...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-02-01
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| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/12/4/718 |
| Summary: | Charge transport layers have been found to be crucial for high-performance perovskite solar cells (PSCs). SnO<sub>2</sub> has been extensively investigated as an alternative material for the traditional TiO<sub>2</sub> electron transport layer (ETL). The challenges facing the successful application of SnO<sub>2</sub> ETLs are degradation during the high-temperature process and voltage loss due to the lower conduction band. To achieve highly efficient PSCs using a SnO<sub>2</sub> ETL, low-temperature-processed mesoporous TiO<sub>2</sub> (LT m-TiO<sub>2</sub>) was combined with compact SnO<sub>2</sub> to construct a bilayer ETL. The use of LT m-TiO<sub>2</sub> can prevent the degradation of SnO<sub>2</sub> as well as enlarge the interfacial contacts between the light-absorbing layer and the ETL. SnO<sub>2</sub>/TiO<sub>2</sub> bilayer-based PSCs showed much higher power conversion efficiency than single SnO<sub>2</sub> ETL-based PSCs. |
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| ISSN: | 2079-4991 |