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

DC Field Value Language
dc.contributor.authorLee, Hyeon-Dong-
dc.contributor.authorKim, Hobeom-
dc.contributor.authorCho, Himchan-
dc.contributor.authorCha, Wonhee-
dc.contributor.authorHong, Yongseok-
dc.contributor.authorKim, Young-Hoon-
dc.contributor.authorSadhanala, Aditya-
dc.contributor.authorVenugopalan, Vijay-
dc.contributor.authorKim, Joo Sung-
dc.contributor.authorChoi, Jin Woo-
dc.contributor.authorLee, Chang-Lyoul-
dc.contributor.authorKim, Dongho-
dc.contributor.authorYang, Hoichang-
dc.contributor.authorFriend, Richard H.-
dc.contributor.authorLee, Tae-Woo-
dc.date.accessioned2021-01-31T04:59:47Z-
dc.date.available2021-01-31T04:59:47Z-
dc.date.created2020-04-10-
dc.date.created2020-04-10-
dc.date.issued2019-07-
dc.identifier.citationAdvanced Functional Materials, Vol.29 No.27, p. 1901225-
dc.identifier.issn1616-301X-
dc.identifier.other95650-
dc.identifier.urihttps://hdl.handle.net/10371/171787-
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.language영어-
dc.publisherJohn Wiley & Sons Ltd.-
dc.titleEfficient Ruddlesden-Popper Perovskite Light-Emitting Diodes with Randomly Oriented Nanocrystals-
dc.typeArticle-
dc.contributor.AlternativeAuthor이태우-
dc.identifier.doi10.1002/adfm.201901225-
dc.citation.journaltitleAdvanced Functional Materials-
dc.identifier.wosid000478619900008-
dc.identifier.scopusid2-s2.0-85063695561-
dc.citation.number27-
dc.citation.startpage1901225-
dc.citation.volume29-
dc.identifier.sci000478619900008-
dc.description.isOpenAccessN-
dc.contributor.affiliatedAuthorLee, Tae-Woo-
dc.type.docTypeArticle-
dc.description.journalClass1-
dc.subject.keywordPlusLASER CRYSTALLIZATION-
dc.subject.keywordPlusENERGY-
dc.subject.keywordPlusSTATES-
dc.subject.keywordAuthorcarrier transport-
dc.subject.keywordAuthornanocrystal orientation-
dc.subject.keywordAuthornanocrystal pinning-
dc.subject.keywordAuthorquasi-2D perovskite-
dc.subject.keywordAuthorstructural modulation-
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