Degradation mechanism of hybrid tin-based perovskite solar cells and the critical role of tin (IV) iodide
| Autor: | Dong Ding, Robert J. E. Westbrook, Benedetta Gaggio, Nourdine Zibouche, M. Saiful Islam, Xinxing Liang, Ganghong Min, Saif A. Haque, Luis Lanzetta, Thomas J. Macdonald, Thomas Webb |
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| Přispěvatelé: | Engineering & Physical Science Research Council (EPSRC), Engineering & Physical Science Research Council (E, EPSRC, Engineering and Physical Sciences Research Council |
| Rok vydání: | 2021 |
| Předmět: |
Solar cells
Materials science Science General Physics and Astronomy chemistry.chemical_element 02 engineering and technology Substrate (electronics) 010402 general chemistry 01 natural sciences Article General Biochemistry Genetics and Molecular Biology chemistry.chemical_compound Photovoltaics Perovskite (structure) Energy Multidisciplinary business.industry General Chemistry equipment and supplies 021001 nanoscience & nanotechnology Decomposition 0104 chemical sciences Formamidinium Chemical engineering chemistry Degradation (geology) 0210 nano-technology business Tin(IV) iodide Tin |
| Zdroj: | Nature Communications, Vol 12, Iss 1, Pp 1-11 (2021) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Tin perovskites have emerged as promising alternatives to toxic lead perovskites in next-generation photovoltaics, but their poor environmental stability remains an obstacle towards more competitive performances. Therefore, a full understanding of their decomposition processes is needed to address these stability issues. Herein, we elucidate the degradation mechanism of 2D/3D tin perovskite films based on (PEA)0.2(FA)0.8SnI3 (where PEA is phenylethylammonium and FA is formamidinium). We show that SnI4, a product of the oxygen-induced degradation of tin perovskite, quickly evolves into iodine via the combined action of moisture and oxygen. We identify iodine as a highly aggressive species that can further oxidise the perovskite to more SnI4, establishing a cyclic degradation mechanism. Perovskite stability is then observed to strongly depend on the hole transport layer chosen as the substrate, which is exploited to tackle film degradation. These key insights will enable the future design and optimisation of stable tin-based perovskite optoelectronics. Tin perovskites have emerged as promising alternatives to toxic lead perovskite in next-generation photovoltaics, but the poor environmental stability remains an obstacle for the application. Here, the authors study the degradation mechanism of tin perovskite films, and identify a cyclic degradation mechanism involving tin (IV) iodide. |
| Databáze: | OpenAIRE |
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