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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202001906
|2 doi
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|a pubmed24n1034.xml
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|a (DE-627)NLM310313899
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|a (NLM)32449221
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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 Ling, Xufeng
|e verfasserin
|4 aut
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|a Guanidinium-Assisted Surface Matrix Engineering for Highly Efficient Perovskite Quantum Dot Photovoltaics
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|c 2020
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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 30.09.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a Metal halide perovskite quantum dots (Pe-QDs) are of great interest in new-generation photovoltaics (PVs). However, it remains challenging in the construction of conductive and intact Pe-QD films to maximize their functionality. Herein, a ligand-assisted surface matrix strategy to engineer the surface and packing states of Pe-QD solids is demonstrated by a mild thermal annealing treatment after ligand exchange processing (referred to as "LE-TA") triggered by guanidinium thiocyanate. The "LE-TA" method induces the formation of surface matrix on CsPbI3 QDs, which is dominated by the cationic guanidinium (GA+ ) rather than the SCN- , maintaining the intact cubic structure and facilitating interparticle electrical interaction of QD solids. Consequently, the GA-matrix-confined CsPbI3 QDs exhibit remarkably enhanced charge mobility and carrier diffusion length compared to control ones, leading to a champion power conversion efficiency of 15.21% when assembled in PVs, which is one of the highest among all Pe-QD solar cells. Additionally, the "LE-TA" method shows similar effects when applied to other Pe-QD PV systems like CsPbBr3 and FAPbI3 (FA = formamidinium), indicating its versatility in regulating the surfaces of various Pe-QDs. This work may afford new guidelines to construct electrically conductive and structurally intact Pe-QD solids for efficient optoelectronic devices
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|a Journal Article
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|a CsPbI3
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|a guanidinium thiocyanate
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|a ligand exchange
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|a perovskite quantum dots
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|a solar cells
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|a Yuan, Jianyu
|e verfasserin
|4 aut
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1 |
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|a Zhang, Xuliang
|e verfasserin
|4 aut
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1 |
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|a Qian, Yuli
|e verfasserin
|4 aut
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|a Zakeeruddin, Shaik M
|e verfasserin
|4 aut
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|a Larson, Bryon W
|e verfasserin
|4 aut
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|a Zhao, Qian
|e verfasserin
|4 aut
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|a Shi, Junwei
|e verfasserin
|4 aut
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|a Yang, Jiacheng
|e verfasserin
|4 aut
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|a Ji, Kang
|e verfasserin
|4 aut
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|a Zhang, Yannan
|e verfasserin
|4 aut
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|a Wang, Yongjie
|e verfasserin
|4 aut
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|a Zhang, Chunyang
|e verfasserin
|4 aut
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|a Duhm, Steffen
|e verfasserin
|4 aut
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|a Luther, Joseph M
|e verfasserin
|4 aut
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|a Grätzel, Michael
|e verfasserin
|4 aut
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|a Ma, Wanli
|e verfasserin
|4 aut
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 32(2020), 26 vom: 30. Juli, Seite e2001906
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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|g volume:32
|g year:2020
|g number:26
|g day:30
|g month:07
|g pages:e2001906
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|u http://dx.doi.org/10.1002/adma.202001906
|3 Volltext
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|d 32
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|e 26
|b 30
|c 07
|h e2001906
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