Efficient Ruddlesden-Popper Perovskite Light-Emitting Diodes with Randomly Oriented Nanocrystals

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dc.contributor.authorLee, Hyeon-Dongko
dc.contributor.authorKim, Hobeomko
dc.contributor.authorCho, Himchanko
dc.contributor.authorCha, Wonheeko
dc.contributor.authorHong, Yongseokko
dc.contributor.authorKim, Young-Hoonko
dc.contributor.authorSadhanala, Adityako
dc.contributor.authorVenugopalan, Vijayko
dc.contributor.authorKim, Joo Sungko
dc.contributor.authorChoi, Jin Wooko
dc.contributor.authorLee, Chang-Lyoulko
dc.contributor.authorKim, Donghoko
dc.contributor.authorYang, Hoichangko
dc.contributor.authorFriend, Richard H.ko
dc.contributor.authorLee, Tae-Wooko
dc.date.accessioned2021-03-06T02:50:04Z-
dc.date.available2021-03-06T02:50:04Z-
dc.date.created2021-03-06-
dc.date.issued2019-07-
dc.identifier.citationADVANCED FUNCTIONAL MATERIALS, v.29, no.27-
dc.identifier.issn1616-301X-
dc.identifier.urihttp://hdl.handle.net/10203/281274-
dc.description.abstractRuddlesden-Popper phase (RP-phase) perovskites that consist of 2D perovskite slabs interleaved with bulky organic ammonium (OA) are favorable for light-emitting diodes (LEDs). The critical limitation of LED applications is that the insulating OA arranged in a preferred orientation limits charge transport. Therefore, the ideal solution is to achieve a randomly connected structure that can improve charge transport without hampering the confinement of the electron-hole pair. Here, a structurally modulated RP-phase metal halide perovskite (MHP), (PEA)(2)(CH3NH3)(m-1)PbmBr3m+1 is introduced to make the randomly oriented RP-phase unit and ensure good connection between them by applying modified nanocrystal pinning, which leads to an increase in the efficiency of perovskite LEDs (PeLEDs). The randomly connected RP-phase MHP forces contact between inorganic layers and thereby yields efficient charge transport and radiative recombination. Combined with an optimal dimensionality, (PEA)(2)(CH3NH3)(2)Pb3Br10, the structurally modulated RP-phase MHP exhibits increased photoluminescence quantum efficiency, from 0.35% to 30.3%, and their PeLEDs show a 2,018 times higher current efficiency (20.18 cd A(-1)) than in the 2D PeLED (0.01 cd A(-1)) and 673 times than in the 3D PeLED (0.03 cd A(-1)) using the same film formation process. This approach provides insight on how to solve the limitation of RP-phase MHP for efficient PeLEDs.-
dc.languageEnglish-
dc.publisherWILEY-V C H VERLAG GMBH-
dc.titleEfficient Ruddlesden-Popper Perovskite Light-Emitting Diodes with Randomly Oriented Nanocrystals-
dc.typeArticle-
dc.identifier.wosid000478619900008-
dc.identifier.scopusid2-s2.0-85063695561-
dc.type.rimsART-
dc.citation.volume29-
dc.citation.issue27-
dc.citation.publicationnameADVANCED FUNCTIONAL MATERIALS-
dc.identifier.doi10.1002/adfm.201901225-
dc.contributor.localauthorCho, Himchan-
dc.contributor.nonIdAuthorLee, Hyeon-Dong-
dc.contributor.nonIdAuthorKim, Hobeom-
dc.contributor.nonIdAuthorCha, Wonhee-
dc.contributor.nonIdAuthorHong, Yongseok-
dc.contributor.nonIdAuthorKim, Young-Hoon-
dc.contributor.nonIdAuthorSadhanala, Aditya-
dc.contributor.nonIdAuthorVenugopalan, Vijay-
dc.contributor.nonIdAuthorKim, Joo Sung-
dc.contributor.nonIdAuthorChoi, Jin Woo-
dc.contributor.nonIdAuthorLee, Chang-Lyoul-
dc.contributor.nonIdAuthorKim, Dongho-
dc.contributor.nonIdAuthorYang, Hoichang-
dc.contributor.nonIdAuthorFriend, Richard H.-
dc.contributor.nonIdAuthorLee, Tae-Woo-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorcarrier transport-
dc.subject.keywordAuthornanocrystal orientation-
dc.subject.keywordAuthornanocrystal pinning-
dc.subject.keywordAuthorquasi-2D perovskite-
dc.subject.keywordAuthorstructural modulation-
dc.subject.keywordPlusLASER CRYSTALLIZATION-
dc.subject.keywordPlusENERGY-
dc.subject.keywordPlusSTATES-
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