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231225s2018 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201804792
|2 doi
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|a pubmed24n0966.xml
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|a (DE-627)NLM290029260
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|a (NLM)30368936
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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 Adhyaksa, Gede W P
|e verfasserin
|4 aut
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|a Understanding Detrimental and Beneficial Grain Boundary Effects in Halide Perovskites
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|c 2018
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 11.01.2019
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|a Date Revised 01.10.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a Grain boundaries play a key role in the performance of thin-film optoelectronic devices and yet their effect in halide perovskite materials is still not understood. The biggest factor limiting progress is the inability to identify grain boundaries. Noncrystallographic techniques can misidentify grain boundaries, leading to conflicting literature reports about their influence; however, the gold standard - electron backscatter diffraction (EBSD) - destroys halide perovskite thin films. Here, this problem is solved by using a solid-state EBSD detector with 6000 times higher sensitivity than the traditional phosphor screen and camera. Correlating true grain size with photoluminescence lifetime, carrier diffusion length, and mobility shows that grain boundaries are not benign but have a recombination velocity of 1670 cm s-1 , comparable to that of crystalline silicon. Amorphous grain boundaries are also observed that give rise to locally brighter photoluminescence intensity and longer lifetimes. This anomalous grain boundary character offers a possible explanation for the mysteriously long lifetime and record efficiency achieved in small grain halide perovskite thin films. It also suggests a new approach for passivating grain boundaries, independent of surface passivation, to lead to even better performance in optoelectronic devices
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|a Journal Article
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|a amorphous grain boundaries
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|a carrier lifetime
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|a diffusion length
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|a electron backscatter diffraction (EBSD)
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|a grain size effect
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|a halide perovskites
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|a mobility
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|a Brittman, Sarah
|e verfasserin
|4 aut
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|a Āboliņš, Haralds
|e verfasserin
|4 aut
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|a Lof, Andries
|e verfasserin
|4 aut
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1 |
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|a Li, Xueying
|e verfasserin
|4 aut
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1 |
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|a Keelor, Joel D
|e verfasserin
|4 aut
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|a Luo, Yanqi
|e verfasserin
|4 aut
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1 |
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|a Duevski, Teodor
|e verfasserin
|4 aut
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1 |
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|a Heeren, Ron M A
|e verfasserin
|4 aut
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|a Ellis, Shane R
|e verfasserin
|4 aut
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|a Fenning, David P
|e verfasserin
|4 aut
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|a Garnett, Erik C
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 30(2018), 52 vom: 30. Dez., Seite e1804792
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:30
|g year:2018
|g number:52
|g day:30
|g month:12
|g pages:e1804792
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|u http://dx.doi.org/10.1002/adma.201804792
|3 Volltext
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