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Theory of light-induced degradation in perovskite solar cells
Solar Energy Materials and Solar Cells ( IF 6.9 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.solmat.2019.110383
Hamid Shahivandi , Majid Vaezzadeh , Mohammadreza Saeidi

Abstract One of the fundamental challenges that have prevented practical use of the perovskite solar cell is the current degradation in exposure conditions, causing instability of the power conversion efficiency. We present here a theory for this current degradation in perovskite solar cells. Many researchers attribute this degradation to the vacancies migration in the perovskite layer. But there are two fundamental ambiguities in the theories presented for the ion migration process. First, according to the assumptions of these theories, this vacancy migration to the sides of the perovskite layer should also happen in dark conditions, while this occurs only in exposure conditions. Second, according to the assumptions of these theories, the degraded solar cell should not be recovered in dark conditions, while recovery takes place in dark conditions. The approach we present in this paper provides a good understanding of the processes of degradation and recovery in perovskite solar cells, as well as resolves these ambiguities.

中文翻译:

钙钛矿太阳能电池中光致降解的理论

摘要 阻碍钙钛矿太阳能电池实际应用的基本挑战之一是当前暴露条件下的退化,导致功率转换效率不稳定。我们在这里提出了钙钛矿太阳能电池中这种电流退化的理论。许多研究人员将这种退化归因于钙钛矿层中的空位迁移。但是,在为离子迁移过程提出的理论中存在两个基本的歧义。首先,根据这些理论的假设,这种向钙钛矿层两侧的空位迁移也应该发生在黑暗条件下,而这只发生在暴露条件下。其次,根据这些理论的假设,退化的太阳能电池不应在黑暗条件下恢复,而恢复发生在黑暗条件下。
更新日期:2020-05-01
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