posted on 2020-03-19, 20:30authored byAleksandra G. Boldyreva, Lyubov A. Frolova, Ivan S. Zhidkov, Lavrenty G. Gutsev, Ernst Z. Kurmaev, Bala R. Ramachandran, Vladimir G. Petrov, Keith J. Stevenson, Sergey M. Aldoshin, Pavel A. Troshin
In this work, we
report a comparative study of the gamma ray stability
of perovskite solar cells based on a series of perovskite absorbers
including MAPbI3 (MA = methylammonium), MAPbBr3, Cs0.15FA0.85PbI3 (FA = formamidinim),
Cs0.1MA0.15FA0.75PbI3,
CsPbI3, and CsPbBr3. We reveal that the composition
of the perovskite material strongly affects the radiation stability
of the solar cells. In particular, solar cells based on the MAPbI3 were found to be the most resistant to gamma rays since this
perovskite undergoes rapid self-healing due to the special gas-phase
chemistry analyzed with ab initio calculations. The
fact that the solar cells based on MAPbI3 can withstand
a 1000 kRad gamma ray dose without any noticeable degradation of the
photovoltaic properties is particularly exciting and shifts the paradigm
of research in this field toward designing more dynamic rather than
intrinsically robust (e.g., inorganic) materials.