Deretzis Ioannis, Smecca Emanuele, Mannino Giovanni, La Magna Antonino, Miyasaka Tsutomu, Alberti Alessandra
Institute for Microelectronics and Microsystems (CNR-IMM) , Zona Industriale - VIII Strada 5 , Catania 95121 , Italy.
Graduate School of Engineering , Toin University of Yokohama , 1614, Kuroganecho , Aoba, Yokohama 225-8503 , Japan.
J Phys Chem Lett. 2018 Jun 7;9(11):3000-3007. doi: 10.1021/acs.jpclett.8b00120. Epub 2018 May 21.
Methylammonium lead iodide (CHNHPbI) is an extensively used perovskite material with a remarkable potential for solar energy conversion. Despite its high photovoltaic efficiency, the material suffers from fast degradation when aging in atmospheric conditions and/or under sunlight. Here we review the principal degradation mechanisms of CHNHPbI, focusing on the thermodynamic, environmental and polymorphic parameters that impact the stability of the material. A critical analysis of the available data indicates that degradation under ambient conditions is a defect-generation process that is highly localized on surfaces and interfaces, while it is further enhanced above the tetragonal-cubic transition at ∼54 °C. Within this context, we discuss the conservative role of N and propose strategies for the emergence of industrially viable hybrid photovoltaics.
甲基碘化铅铵（CH₃NH₃PbI₃）是一种广泛使用的钙钛矿材料，在太阳能转换方面具有显著潜力。尽管其光伏效率很高，但该材料在大气条件下老化和/或在阳光下会快速降解。在此，我们综述了CH₃NH₃PbI₃的主要降解机制，重点关注影响材料稳定性的热力学、环境和多晶型参数。对现有数据的批判性分析表明，在环境条件下的降解是一个缺陷产生过程，高度局限于表面和界面，而在约54℃的四方-立方转变温度以上会进一步加剧。在此背景下，我们讨论了氮的保守作用，并提出了实现工业上可行的混合光伏的策略。
