Mixing of Azetidinium in Formamidinium Tin Triiodide Perovskite Solar Cells for Enhanced Photovoltaic Performance and High Stability in Air
| Autor: | Sudhakar Narra, Sumit S. Bhosale, Effat Jokar, Ping Huan Hou, He Shiang Chuang, Eric Wei-Guang Diau |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
General Chemical Engineering Photovoltaic system Energy conversion efficiency chemistry.chemical_element Heterojunction Crystal structure chemistry.chemical_compound General Energy Formamidinium chemistry Chemical engineering Environmental Chemistry General Materials Science Triiodide Tin Perovskite (structure) |
| Zdroj: | ChemSusChem. 14(20) |
| ISSN: | 1864-564X |
| Popis: | Overcoming the issue of the stability of tin-based perovskites is a major challenge for the commercial development of lead-free perovskite solar cells. To attack this problem, a new organic cation, azetidinium (AZ), is incorporated into the crystal structure of formamidinium tin triiodide (FASnI3 ) to form the mixed-cation perovskite AZx FA1-x SnI3 . As AZ has a similar size to FA but a larger dipole moment, hybrid AZx FA1-x SnI3 films exhibit variation in optical and electronic properties on increasing the proportion of AZ. Trifluoromethylbenzene (CF3 C6 H5 ) serves as antisolvent to fabricate smooth and uniform perovskite films for the devices with an inverted planar heterojunction structure. The device performance is optimized to produce the greatest efficiency at x=0.15 (AZ15), for which a power conversion efficiency of 9.6 % is obtained when the unencapsulated AZ15 device is stored in air for 100 h. Moreover, the device retains 90 % of its initial efficiency for over 15 days. The significant performance and stability of this device reveal that the concept of mixed cations is a promising approach to stabilize tin-based perovskite solar cells for future commercialization. |
| Databáze: | OpenAIRE |
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