Publication date: 23rd October 2020
Our joint experimental-theoretical work examined a variety of perovskites as gamma absorbers including MAPbI3, MAPbBr3, Cs0.15FA0.85PbI3, Cs0.1MA0.15FA0.75PbI3, CsPbI3, and CsPbBr3. It was shown that the stability of the materials under gamma irradiation varies greatly among the materials. In particular, solar cells based on the MAPbI3 were found to be the most resistant to gamma rays. This was explained by the defects formed in the materials undergoing rapid self-healing due to the dynamic behavior of this system. Fully-inorganic as well as mixed cation perovskite formulations did not deliver comparable stability due to the special gas-phase chemistry analyzed with ab initio calculations, which occurs in MAPbI3 but does not in other perovskites. This unique radiation-stability means that MAPI, while quite an unstable material in terrestrial conditions, is highly promising in space applications.
References:
(1) Boldyreva, A. G.; Frolova, L. A.; Zhidkov, I. S.; Gutsev, L. G.; Kurmaev, E. Z.; Ramachandran, B. R.; Petrov, V. G.; Stevenson, K. J.; Aldoshin, S. M.; Troshin, P. A. Unravelling the Material Composition Effects on the Gamma Ray Stability of Lead Halide Perovskite Solar Cells: MAPbI3 Breaks the Records. J. Phys. Chem. Lett. 2020.
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