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000904016 1001_ $$0P:(DE-HGF)0$$aZhang, Mingming$$b0
000904016 245__ $$aMolecular engineering towards efficientwhite-light-emitting perovskite
000904016 260__ $$a[London]$$bNature Publishing Group UK$$c2021
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000904016 520__ $$aLow-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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000904016 7001_ $$0P:(DE-HGF)0$$aZhao, Lili$$b1
000904016 7001_ $$00000-0002-8306-2973$$aXie, Jiahao$$b2
000904016 7001_ $$aZhang, Qian$$b3
000904016 7001_ $$0P:(DE-HGF)0$$aWang, Xiaoyu$$b4
000904016 7001_ $$0P:(DE-Juel1)164884$$aYaqoob, Najma$$b5$$ufzj
000904016 7001_ $$0P:(DE-HGF)0$$aYin, Zhengmao$$b6
000904016 7001_ $$0P:(DE-Juel1)174502$$aKaghazchi, Payam$$b7
000904016 7001_ $$0P:(DE-HGF)0$$aZhang, San$$b8
000904016 7001_ $$aLi, Hua$$b9
000904016 7001_ $$00000-0001-9030-5606$$aZhang, Chunfeng$$b10
000904016 7001_ $$0P:(DE-Juel1)184889$$aWang, Lei$$b11
000904016 7001_ $$00000-0002-6438-5486$$aZhang, Lijun$$b12$$eCorresponding author
000904016 7001_ $$00000-0002-3014-756X$$aXu, Weigao$$b13$$eCorresponding author
000904016 7001_ $$00000-0003-4499-4062$$aXing, Jun$$b14$$eCorresponding author
000904016 773__ $$0PERI:(DE-600)2553671-0$$a10.1038/s41467-021-25132-2$$gVol. 12, no. 1, p. 4890$$n1$$p4890$$tNature Communications$$v12$$x2041-1723$$y2021
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