Modulation of Growth Kinetics of Vacuum-Deposited CsPbBr3 Films for Efficient Light-Emitting Diodes

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dc.contributor.authorShin, Mingueko
dc.contributor.authorLee, Ho Seungko
dc.contributor.authorSim, Young Chulko
dc.contributor.authorCho, Yong-Hoonko
dc.contributor.authorChoi, Kyung Cheolko
dc.contributor.authorShin, Byunghako
dc.date.accessioned2020-03-19T01:28:42Z-
dc.date.available2020-03-19T01:28:42Z-
dc.date.created2020-02-26-
dc.date.created2020-02-26-
dc.date.issued2020-01-
dc.identifier.citationACS APPLIED MATERIALS & INTERFACES, v.12, no.1, pp.1944 - 1952-
dc.identifier.issn1944-8244-
dc.identifier.urihttp://hdl.handle.net/10203/272435-
dc.description.abstractBecause of its excellent optical properties and good stability, all-inorganic halide perovskite CsPbX3 (X = I, Br, Cl) has been attracting interest for use in light-emitting diodes (LEDs). One challenge is improving the efficacy of the spatial confinement of excitons for higher luminescence efficiency. Here, we present a simple yet very effective strategy to form fine-grain-structured CsPbBr3 polycrystalline films prepared by thermal co-evaporation. The strategy involves controlling growth kinetics by adjusting the deposition rate, which, along with growth temperature, determines the nucleation rate and therefore the eventual grain structure. A correlation between deposition rate and average grain size was noted except for a very large deposition rate when there were large hillocks, which we attributed to the peculiar growth behavior of PbBr2 films. The growth conditions that produced a nanoscale grain structure and textured orientations without large hillocks also resulted in the highest luminescence efficiency as we anticipated. With the optimized CsPbBr3 light emitters, we demonstrate a green-light-emitting (at 524 nm) LED with a maximum current efficiency of 1.07 cd/A and an extremely narrow electroluminescence spectrum of 18 nm, a result that highlights the potential of vacuum-processed CsPbBr3 films for high-efficiency LEDs.-
dc.languageEnglish-
dc.publisherAMER CHEMICAL SOC-
dc.titleModulation of Growth Kinetics of Vacuum-Deposited CsPbBr3 Films for Efficient Light-Emitting Diodes-
dc.typeArticle-
dc.identifier.wosid000507146100200-
dc.identifier.scopusid2-s2.0-85077125692-
dc.type.rimsART-
dc.citation.volume12-
dc.citation.issue1-
dc.citation.beginningpage1944-
dc.citation.endingpage1952-
dc.citation.publicationnameACS APPLIED MATERIALS & INTERFACES-
dc.identifier.doi10.1021/acsami.9b20094-
dc.contributor.localauthorCho, Yong-Hoon-
dc.contributor.localauthorChoi, Kyung Cheol-
dc.contributor.localauthorShin, Byungha-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorperovskites-
dc.subject.keywordAuthorCsPbBr3-
dc.subject.keywordAuthorthermal co-evaporation-
dc.subject.keywordAuthorvacuum deposition-
dc.subject.keywordAuthorlight-emitting diodes-
dc.subject.keywordAuthorLEDs-
dc.subject.keywordPlusPEROVSKITE SOLAR-CELLS-
dc.subject.keywordPlusHALIDE PEROVSKITES-
dc.subject.keywordPlusHIGH-PERFORMANCE-
dc.subject.keywordPlusBRIGHT-
dc.subject.keywordPlusPHOTOLUMINESCENCE-
dc.subject.keywordPlusCRYSTALLIZATION-
dc.subject.keywordPlusCH3NH3PBBR3-
dc.subject.keywordPlusORIGINS-
dc.subject.keywordPlusCSPBX3-
dc.subject.keywordPlusBR-
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PH-Journal Papers(저널논문)EE-Journal Papers(저널논문)MS-Journal Papers(저널논문)
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