In CH 3 NH 3 PbI 3 Perovskite Film, the Surface Termination Layer Dominates the Moisture Degradation Pathway
| العنوان: | In CH 3 NH 3 PbI 3 Perovskite Film, the Surface Termination Layer Dominates the Moisture Degradation Pathway |
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| المؤلفون: | Yue Lu, Yang Ge, K. Selvakumar, Zeyu Zhang, Hongpeng Liu, Jingcong Hu, Manling Sui, Xulin Mu, Si Zhixiang |
| المصدر: | Chemistry – A European Journal. 27:3729-3736 |
| بيانات النشر: | Wiley, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Moisture, 010405 organic chemistry, Chemistry, Organic Chemistry, Layer by layer, Perovskite solar cell, Humidity, General Chemistry, 010402 general chemistry, 01 natural sciences, Catalysis, 0104 chemical sciences, Deprotonation, Chemical engineering, Molecule, Crystallite, Hydrate |
| الوصف: | Theoretical studies have shown that surface terminations, such as MAI or PbI layers, greatly affect the environmental stability of organic-inorganic perovskite. However, until now, there has been little effort to experimentally detect the existence of MAI or PbI terminations on MAPbI3 grains, let alone disclose their effects on the humidity degradation pathway of perovskite solar cell. Here, we successfully modified and detected the surface terminations of MAI and PbI species on polycrystalline MAPbI3 films. MAI-terminated perovskite film followed the moisture degradation process from MAPbI3 to hydrate MAPbI3 ⋅H2 O and then into PbI2 , with penetration of water molecules being the main driving force leading to the degradation of MAPbI3 layer by layer. In contrast, for the PbI-terminated perovskite film in a humid atmosphere, a deprotonation degradation pathway was confirmed, in which the film preferentially degraded directly from MAPbI3 into PbI2 , here the iodine defects played a key role in promoting the dissociation of water molecules into OH- and further catalyzing the decomposition of perovskite. |
| تدمد: | 1521-3765 0947-6539 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::93c7b05fae5893fe368a42d07236e176 https://doi.org/10.1002/chem.202003121 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........93c7b05fae5893fe368a42d07236e176 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15213765 09476539 |
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