Degradation mechanism of hybrid tin-based perovskite solar cells and the critical role of tin (IV) iodide.
Degradation mechanism of hybrid tin-based perovskite solar cells and the critical role of tin (IV) iodide.
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杂化锡基钙钛矿太阳能电池的退化机理及碘化锡的关键作用。
DOI：
10.1038/s41467-021-22864-z
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发表时间：
2021-05-14
影响因子：
16.6
通讯作者：
Haque SA
中科院分区：
文献类型：
--
作者：
Lanzetta L;Webb T;Zibouche N;Liang X;Ding D;Min G;Westbrook RJE;Gaggio B;Macdonald TJ;Islam MS;Haque SA
锡钙钛矿已成为下一代光伏电池中有毒的铅钙钛矿的有前途的替代品，但其较差的环境稳定性仍然是实现更具竞争力性能的障碍。因此，需要充分了解它们的分解过程来解决这些稳定性问题。在此，我们阐明了基于（PEA）0.2(FA)0.8SnI3（其中PEA为苯乙基铵，FA为甲脒）的2D/3D锡钙钛矿膜的降解机理。我们发现，锡钙钛矿的氧诱导降解产物SnI4通过水分和氧气的共同作用迅速演变成碘。我们发现碘是一种具有高度侵略性的物质，可以进一步氧化钙钛矿生成更多的SnI4，建立循环降解机制。然后观察到钙钛矿的稳定性强烈依赖于选择作为衬底的空穴传输层，这被用来解决薄膜降解问题。这些关键的见解将使未来稳定的锡基钙钛矿光电子的设计和优化成为可能。锡钙钛矿已成为下一代光伏电池中有毒的铅钙钛矿的有前途的替代品，但环境稳定性差仍然是应用的障碍。本文研究了锡钙钛矿膜的降解机理，确定了含碘化锡的循环降解机理。
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.
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影响因子：
2.7
作者：
Giannozzi, P.;Andreussi, O.;Baroni, S.
通讯作者：
Baroni, S.
影响因子：
7.9
作者：
Gu, Feidan;Ye, Senyun;Huang, Chunhui
通讯作者：
Huang, Chunhui
影响因子：
10.8
作者：
Frost JM;Butler KT;Brivio F;Hendon CH;van Schilfgaarde M;Walsh A
通讯作者：
Walsh A
影响因子：
16.6
作者：
Aristidou N;Eames C;Sanchez-Molina I;Bu X;Kosco J;Islam MS;Haque SA
通讯作者：
Haque SA
DOI：
10.1002/wcms.1360
发表时间：
2018-07-01
影响因子：
11.4
作者：
Dovesi, Roberto;Erba, Alessandro;Kirtman, Bernard
通讯作者：
Kirtman, Bernard