Hybrid halide perovskite solar cells have drawn widespread attention with the achievement of high power conversion efficiencies. However, poor stability remains the greatest barrier preventing their commercialization. Performance degradation and recovery have a complicated dependence on the environment and a dependence on the applied bias, which affects ion migration. Herein, solar cells with an organic hole transport layer and cells with an inorganic hole transport layer are compared. A type of degradation of the organic transport layer is examined, which is reversible by applying a forward bias soak, and how the degradation arises from ion migration mechanisms is explained. Experimental current–voltage and capacitance transient measurements are conducted as a function of temperature. The resulting S‐kink and positive capacitance decay are explained in terms of the modeled effects of a changing ion density at the hole transport layer. An irreversible degradation is found upon heating to more than 100 °C. On the contrary, the inorganic hole transport layer is found to eliminate the observable effects of ion migration, even at elevated temperatures, so long as air exposure is avoided.

中文翻译：

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具有有机和无机空穴传输层的钙钛矿太阳能电池的温度和偏压依赖性降解和再生

混合卤化物钙钛矿太阳能电池因实现高功率转换效率而受到广泛关注。但是，稳定性差仍然是阻止其商业化的最大障碍。性能下降和恢复对环境和对施加的偏压有复杂的依赖性，这会影响离子迁移。在此，比较具有有机空穴传输层的太阳能电池和具有无机空穴传输层的太阳能电池。研究了有机传输层的退化类型，该退化类型可以通过施加正向偏压浸泡来逆转，并解释了退化是如何由离子迁移机制引起的。实验电流-电压和电容瞬态测量是温度的函数。产生的S扭结和正电容衰减是根据空穴传输层上离子密度变化的模拟效应来解释的。加热到100°C以上时，发现不可逆的降解。相反，发现无机空穴传输层即使在升高的温度下也消除了可观察到的离子迁移效应，只要避免暴露于空气即可。