Thin films of MAPbI3 and MA0.15FA0.75Cs0.1PbI3 perovskites under femtosecond laser irradiation: nonlinear optical absorption and kinetics of photodegradation |
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| Institution: | 1. Prokhorov General Physics Institute, Russian Academy of Sciences, Physics Instrumentation Center, 108840 Troitsk, Moscow, Russian Federation;2. Optosystems Ltd., 108840 Troitsk, Moscow, Russian Federation;3. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432 Chernogolovka, Moscow Region, Russian Federation |
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| Abstract: | The thin MAPbI3 and MA0.15FA0.75Cs0.1PbI3 perovskite films have strong nonlinear absorption with coefficients of 443 ± 20 and 830 ± 50 cm GW–1, respectively, due to two-photon absorption at 1064 nm. The photochemical degradation of perovskite films was observed upon irradiation with femtosecond pulses at 532 nm, and the depth of photodegradation decreased in perovskite films protected with a PMMA polymer layer. |
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| Keywords: | organometallic halide perovskites thin perovskite films nonlinear optical absorption femtosecond laser irradiation photodegradation |
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