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001     904016
005     20240725202006.0
024 7 _ |a 10.1038/s41467-021-25132-2
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100 1 _ |a Zhang, Mingming
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245 _ _ |a Molecular engineering towards efficientwhite-light-emitting perovskite
260 _ _ |a [London]
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|b Nature Publishing Group UK
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520 _ _ |a Low-dimensional hybrid perovskites have demonstrated excellent performance as white-light emitters. The broadband white emission originates from self-trapped excitons (STEs). Since the mechanism of STEs formation in perovskites is still not clear, preparing new low-dimensional white perovskites relies mostly on screening lots of intercalated organic molecules rather than rational design. Here, we report an atom-substituting strategy to trigger STEs formation in layered perovskites. Halogen-substituted phenyl molecules are applied to synthesize perovskite crystals. The halogen-substituents will withdraw electrons from the branched chain (-R-NH3+) of the phenyl molecule. This will result in positive charge accumulation on -R-NH3+, and thus stronger Coulomb force of bond (-R-NH3+)-(PbBr42−), which facilitates excitons self-trapping. Our designed white perovskites exhibit photoluminescence quantum yield of 32%, color-rendering index of near 90 and chromaticity coordinates close to standard white-light. Our joint experiment-theory study provides insights into the STEs formation in perovskites and will benefit tailoring white perovskites with boosting performance.
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700 1 _ |a Zhao, Lili
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700 1 _ |a Xie, Jiahao
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700 1 _ |a Zhang, Qian
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700 1 _ |a Wang, Xiaoyu
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700 1 _ |a Yaqoob, Najma
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700 1 _ |a Yin, Zhengmao
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700 1 _ |a Kaghazchi, Payam
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700 1 _ |a Zhang, San
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700 1 _ |a Li, Hua
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700 1 _ |a Zhang, Chunfeng
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700 1 _ |a Wang, Lei
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700 1 _ |a Zhang, Lijun
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700 1 _ |a Xu, Weigao
|0 0000-0002-3014-756X
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700 1 _ |a Xing, Jun
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773 _ _ |a 10.1038/s41467-021-25132-2
|g Vol. 12, no. 1, p. 4890
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|t Nature Communications
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|y 2021
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856 4 _ |u https://juser.fz-juelich.de/record/904016/files/s41467-021-25132-2.pdf
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