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Degradation mechanisms and defect formation of metal halide perovskites

Key experiments in our institute showed the photo-induced dissociation of organic cations in metal halide perovskites, for example, of CH3NH3+ to CH3NH2 and hydrogen under illumination with blue light [1].


Furthermore, high radiation hardness was observed for solar cells based on metal halide perovskites [2] and even healing of defects formed by proton bombardment was detected [3].


[1] Unraveling the light-induced degradation mechanisms of CH3NH3PbI3 perovskite films; Nickel, N.H.; Lang, F.; Brus, V.V.; Shargaieva,O.; Rappich, J.; Advanced Electronic Materials (2017)

[2] Radiation Hardness and Self-Healing of Perovskite Solar Cells; Lang, F.; Nickel, N.H.;  Bundesmann, J.; Seidel, S.; Denker, A.; Albrecht, S.; Brus, V.V.; Rappich, J.; Rech, B.; Landi, G.; Neitzert, H.C.; Advanced Materials 28 (2016) 8726-8731

[3] Defect Dynamics in Proton Irradiated CH3NH3PbI3 Perovskite Solar Cells; Brus, V.V.; Lang, F.; Bundesmann, J.; Seidel, S.; Denker, A.; Rech, B.; Landi, G.; Neitzert, H.C.; Rappich, J.; Nickel, N.H.; Advanced Electronic Materials 3 (2017) 1600438