Akbulatov Azat F, Ustinova Marina I, Shilov Gennady V, Dremova Nadezhda N, Zhidkov Ivan S, Kurmaev Ernst Z, Frolova Lyubov A, Shestakov Alexander F, Aldoshin Sergey M, Troshin Pavel A
The Institute for Problems of Chemical Physics of the Russian Academy of Sciences, Semenov Prospect 1, Chernogolovka 142432, Russia.
Institute of Physics and Technology, Ural Federal University, Mira 19 Street, Yekaterinburg 620002, Russia.
J Phys Chem Lett. 2021 May 13;12(18):4362-4367. doi: 10.1021/acs.jpclett.1c00883. Epub 2021 May 3.
Regardless of the impressive photovoltaic performances demonstrated for lead halide perovskite solar cells, their practical implementation is severely impeded by the low device stability. Complex lead halides are sensitive to both light and heat, which are unavoidable under realistic solar cell operational conditions. Suppressing these intrinsic degradation pathways requires a thorough understanding of their mechanistic aspects. Herein, we explored the temperature effects in the light-induced decomposition of MAPbI and PbI thin films under anoxic conditions. The analysis of the aging kinetics revealed that MAPbI photolysis and PbI photolysis have quite high effective activation energies of ∼85 and ∼106 kJ mol, respectively, so decreasing the temperature from 55 to 30 °C can extend the perovskite lifetime by factors of >10-100. These findings suggest that controlling the temperature of the perovskite solar panels might allow the long operational lifetimes (>20 years) required for the practical implementation of this promising technology.
尽管卤化铅钙钛矿太阳能电池展现出了令人印象深刻的光伏性能，但其实际应用却因器件稳定性低而受到严重阻碍。复杂的卤化铅对光和热都很敏感，而在实际的太阳能电池运行条件下，光和热是不可避免的。抑制这些内在的降解途径需要深入了解其机理。在此，我们探讨了缺氧条件下MAPbI和PbI薄膜光致分解中的温度效应。老化动力学分析表明，MAPbI光解和PbI光解分别具有相当高的有效活化能，约为85和106 kJ/mol，因此将温度从55℃降至30℃可使钙钛矿寿命延长10 - 100倍。这些发现表明，控制钙钛矿太阳能板的温度可能会实现该有前景技术实际应用所需的长运行寿命（>20年）。
