Photoprotection is a vital phenomenon in plants that, under intense and prolonged exposure to light, temporarily limits photon absorption to avoid radiation damage, which allows long-term stable and efficient photosynthesis. Photoprotection has only been linked to organisms; however, we discover a parallel mechanism in metal halide perovskite semiconductors. When perovskite films are exposed to light, a process involving the formation of defects is initiated, which protects the film from overheating and degradation. Defect formation in perovskites is generally undesired, as it leads to a loss of optoelectronic performance. We not only argue that this efficiency loss is temporary but also that it is in fact critical for long-term photostability. Perovskites retain material integrity under intense flux, as defects easily form and the lattice can sustain a large concentration of them. Thus, whether defect formation in perovskites should be mitigated or preserved is a topic requiring further consideration.

Photoprotection in metal halide perovskites by ionic defect formation

Meloni S.
;
2022

Abstract

Photoprotection is a vital phenomenon in plants that, under intense and prolonged exposure to light, temporarily limits photon absorption to avoid radiation damage, which allows long-term stable and efficient photosynthesis. Photoprotection has only been linked to organisms; however, we discover a parallel mechanism in metal halide perovskite semiconductors. When perovskite films are exposed to light, a process involving the formation of defects is initiated, which protects the film from overheating and degradation. Defect formation in perovskites is generally undesired, as it leads to a loss of optoelectronic performance. We not only argue that this efficiency loss is temporary but also that it is in fact critical for long-term photostability. Perovskites retain material integrity under intense flux, as defects easily form and the lattice can sustain a large concentration of them. Thus, whether defect formation in perovskites should be mitigated or preserved is a topic requiring further consideration.
2022
Phung, N.; Mattoni, A.; Smith, J. A.; Skroblin, D.; Kobler, H.; Choubrac, L.; Breternitz, J.; Li, J.; Unold, T.; Schorr, S.; Gollwitzer, C.; Scheblyki...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2495513
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