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231226s2022 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202204458
|2 doi
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|a pubmed24n1148.xml
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|a (DE-627)NLM34469576X
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|a (NLM)35950226
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Liu, Huifen
|e verfasserin
|4 aut
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| 245 |
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|a Reversible Phase Transition for Durable Formamidinium-Dominated Perovskite Photovoltaics
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|c 2022
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 28.09.2022
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2022 Wiley-VCH GmbH.
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|a 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
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|a Journal Article
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|a heat healing
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|a perovskite solar cells
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|a phase stability
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|a reversible phase transition
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|a Li, Nengxu
|e verfasserin
|4 aut
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|a Chen, Zehua
|e verfasserin
|4 aut
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|a Tao, Shuxia
|e verfasserin
|4 aut
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|a Li, Chunlei
|e verfasserin
|4 aut
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|a Jiang, Lang
|e verfasserin
|4 aut
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|a Niu, Xiuxiu
|e verfasserin
|4 aut
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|a Chen, Qi
|e verfasserin
|4 aut
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|a Wang, Feng
|e verfasserin
|4 aut
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| 700 |
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|a Zhang, Yu
|e verfasserin
|4 aut
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| 700 |
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|a Huang, Zijian
|e verfasserin
|4 aut
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|a Song, Tinglu
|e verfasserin
|4 aut
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| 700 |
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|a Zhou, Huanping
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 34(2022), 39 vom: 02. Sept., Seite e2204458
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:34
|g year:2022
|g number:39
|g day:02
|g month:09
|g pages:e2204458
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|u http://dx.doi.org/10.1002/adma.202204458
|3 Volltext
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