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@ARTICLE{Zhang:904016,
author = {Zhang, Mingming and Zhao, Lili and Xie, Jiahao and Zhang,
Qian and Wang, Xiaoyu and Yaqoob, Najma and Yin, Zhengmao
and Kaghazchi, Payam and Zhang, San and Li, Hua and Zhang,
Chunfeng and Wang, Lei and Zhang, Lijun and Xu, Weigao and
Xing, Jun},
title = {{M}olecular engineering towards
efficientwhite-light-emitting perovskite},
journal = {Nature Communications},
volume = {12},
number = {1},
issn = {2041-1723},
address = {[London]},
publisher = {Nature Publishing Group UK},
reportid = {FZJ-2021-05586},
pages = {4890},
year = {2021},
abstract = {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.},
cin = {IEK-1},
ddc = {500},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {899 - ohne Topic (POF4-899)},
pid = {G:(DE-HGF)POF4-899},
typ = {PUB:(DE-HGF)16},
pubmed = {34385451},
UT = {WOS:000686181800028},
doi = {10.1038/s41467-021-25132-2},
url = {https://juser.fz-juelich.de/record/904016},
}