γ‑Ray-Induced Degradation in the Triple-Cation Perovskite Solar Cells
Published on 2019-02-08T19:15:27Z (GMT)
by
We
report on the impact of γ radiation (0–500 Gy)
on triple-cation Cs<sub>0.15</sub>MA<sub>0.10</sub>FA<sub>0.75</sub>Pb(Br<sub>0.17</sub>I<sub>0.83</sub>)<sub>3</sub> perovskite solar
cells. A set of experiments was designed to reveal the individual
contributions of the hole-collecting bottom electrode, perovskite
absorber, and electron transport layer (ETL) to the overall solar
cell degradation under radiation exposure. We show that the glass/ITO/PEDOT:PSS
hole-collecting electrode withstands a 500 Gy dose without any losses
in the solar cell performance. In contrast, the perovskite absorber
films and PC<sub>61</sub>BM ETL are very sensitive to γ rays,
as can be concluded from the radiation-induced decay of the solar
cell efficiency by ∼32–41%. Red shift of the perovskite
emission bands and strong enhancement of the photoluminescence suggest
that γ rays induce phase segregation of iodine-rich and bromine-rich
domains, which represents the first reported example of the radiation-induced
halide phase separation in perovskite films. The degradation pathway
revealed here emphasizes the need for developing a new generation
of metal halide absorbers and ETL materials with improved radiation
stability to enable potential space applications of perovskite photovoltaics.
Cite this collection
Boldyreva, Aleksandra
G.; Akbulatov, Azat F.; Tsarev, Sergey A.; Luchkin, Sergey Yu.; Zhidkov, Ivan S.; Kurmaev, Erst Z.; et al. (2019): γ‑Ray-Induced Degradation in the Triple-Cation
Perovskite Solar Cells. ACS Publications. Collection.