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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202102462
|2 doi
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|a pubmed24n1566.xml
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|a (DE-627)NLM327659378
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|a (NLM)34219285
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Nagane, Satyawan
|e verfasserin
|4 aut
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|a Tetrafluoroborate-Induced Reduction in Defect Density in Hybrid Perovskites through Halide Management
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|c 2021
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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
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|2 rdacarrier
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|a Date Revised 13.10.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2021 The Authors. Advanced Materials published by Wiley-VCH GmbH.
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|a Hybrid-perovskite-based optoelectronic devices are demonstrating unprecedented growth in performance, and defect passivation approaches are highly promising routes to further improve properties. Here, the effect of the molecular ion BF4 - , introduced via methylammonium tetrafluoroborate (MABF4 ) in a surface treatment for MAPbI3 perovskite, is reported. Optical spectroscopy characterization shows that the introduction of tetrafluoroborate leads to reduced non-radiative charge-carrier recombination with a reduction in first-order recombination rate from 6.5 × 106 to 2.5 × 105 s-1 in BF4 - -treated samples, and a consequent increase in photoluminescence quantum yield by an order of magnitude (from 0.5 to 10.4%). 19 F, 11 B, and 14 N solid-state NMR is used to elucidate the atomic-level mechanism of the BF4 - additive-induced improvements, revealing that the BF4 - acts as a scavenger of excess MAI by forming MAI-MABF4 cocrystals. This shifts the equilibrium of iodide concentration in the perovskite phase, thereby reducing the concentration of interstitial iodide defects that act as deep traps and non-radiative recombination centers. These collective results allow us to elucidate the microscopic mechanism of action of BF4 -
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|a Journal Article
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|a charge-carrier recombination
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4 |
|a defects
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|a perovskite solar cells
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|a photoluminescence
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|a surface treatment
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|a tetrafluoroborate
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1 |
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|a Macpherson, Stuart
|e verfasserin
|4 aut
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1 |
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|a Hope, Michael A
|e verfasserin
|4 aut
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1 |
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|a Kubicki, Dominik J
|e verfasserin
|4 aut
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1 |
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|a Li, Weiwei
|e verfasserin
|4 aut
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1 |
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|a Verma, Sachin Dev
|e verfasserin
|4 aut
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1 |
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|a Ferrer Orri, Jordi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chiang, Yu-Hsien
|e verfasserin
|4 aut
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| 700 |
1 |
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|a MacManus-Driscoll, Judith L
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Grey, Clare P
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Stranks, Samuel D
|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 33(2021), 32 vom: 24. Aug., Seite e2102462
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:33
|g year:2021
|g number:32
|g day:24
|g month:08
|g pages:e2102462
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|u http://dx.doi.org/10.1002/adma.202102462
|3 Volltext
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|d 33
|j 2021
|e 32
|b 24
|c 08
|h e2102462
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