Matches in SemOpenAlex for { <https://semopenalex.org/work/W4291019146> ?p ?o ?g. }
- W4291019146 abstract "Phase instability is one of the major obstacles to the wide application of formamidinium (FA)-dominated perovskite solar cells (PSCs). An in-depth investigation on relevant phase transitions is urgently needed to explore more effective phase-stabilization strategies. Herein, the reversible phase-transition process of FA1-x Csx PbI3 perovskite between photoactive phase (α phase) and non-photoactive phase (δ phase) under humidity, as well as the reversible healing of degraded devices, is monitored. Moreover, through in situ atomic force microscopy, the kinetic transition between α and δ phase is revealed to be the nucleation-growth transition process. Density functional theory calculation implies an enthalpy-driven α-to-δ degradation process during humidity aging and an entropy-driven δ-to-α healing process at high temperatures. The α phase of FA1-x Csx PbI3 can be stabilized at elevated temperature under high humidity due to the increased nucleation barrier, and the resulting non-encapsulated PSCs retain >90% of their initial efficiency after >1000 h at 60 °C and 60% relative humidity. This finding provides a deepened understanding on the phase-transition process of FA1-x Csx PbI3 from both thermodynamics and kinetics points of view, which also presents an effective means to stabilize the α phase of FA-dominated perovskites and devices for practical applications." @default.
- W4291019146 created "2022-08-13" @default.
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- W4291019146 date "2022-08-28" @default.
- W4291019146 modified "2023-10-14" @default.
- W4291019146 title "Reversible Phase Transition for Durable Formamidinium‐Dominated Perovskite Photovoltaics" @default.
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- W4291019146 doi "https://doi.org/10.1002/adma.202204458" @default.
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