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High-efficiency polycrystalline perovskite light-emitting diodes based on mixed cations
DC Field | Value | Language |
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dc.contributor.author | Cho, Himchan | - |
dc.contributor.author | Kim, Joo Sung | - |
dc.contributor.author | Wolf, Christoph | - |
dc.contributor.author | Kim, Young-Hoon | - |
dc.contributor.author | Yun, Hyung Joong | - |
dc.contributor.author | Jeong, Su-Hun | - |
dc.contributor.author | Sadhanala, Aditya | - |
dc.contributor.author | Venugopalan, Vijay | - |
dc.contributor.author | Choi, Jin Woo | - |
dc.contributor.author | Lee, Chang-Lyoul | - |
dc.contributor.author | Friend, Richard H. | - |
dc.contributor.author | Lee, Tae-Woo | - |
dc.date.accessioned | 2020-03-12T01:58:16Z | - |
dc.date.available | 2020-03-12T01:58:16Z | - |
dc.date.created | 2019-06-10 | - |
dc.date.issued | 2018-03 | - |
dc.identifier.citation | ACS Nano, Vol.12 No.3, pp.2883-2892 | - |
dc.identifier.issn | 1936-0851 | - |
dc.identifier.other | 75076 | - |
dc.identifier.uri | https://hdl.handle.net/10371/164470 | - |
dc.description.abstract | We have achieved high-efficiency polycrystalline perovskite light-emitting diodes (PeLEDs) based on formamidinium (FA) and cesium (Cs) mixed cations without quantum dot synthesis. Uniform single-phase FA(1-x)Cs(x)PbBr(3) polycrystalline films were fabricated by one-step formation with various FA:Cs molar proportions; then the influences of chemical composition on film morphology, crystal structure, photoluminescence (PL), and electroluminescence (EL) were systematically investigated. Incorporation of Cs+ cations in FAPbBr(3) significantly reduced the average grain size (to 199 nm for FA:Cs = 90:10) and trap density; these changes consequently increased PL quantum efficiency (PLQE) and PL lifetime of FA(1-x)Cs(x)PbBr(3) films and current efficiency (CE) of PeLEDs. Further increase in Cs molar proportion from 10 mol % decreased crystallinity and purity, increased trap density, and correspondingly decreased PLQE, PL lifetime, and CE. Incorporation of Cs also increased photostability of FA(1-x)Cs(x)PbBr(3) films, possibly due to suppressed formation of light-induced metastable states. FA(1-x)Cs(x)PbBr(3) PeLEDs show the maximum CE = 14.5 cd A(-1) at FA:Cs = 90:10 with very narrow EL spectral width (21-24 nm); this is the highest CE among FA-Cs-based PeLEDs reported to date. This work provides an understanding of the influences of Cs incorporation on the chemical, structural, and luminescent properties of FAPbBr(3) polycrystalline films and a breakthrough to increase the efficiency of FA(1-x)Cs(x)PbBr(3) PeLEDs. | - |
dc.language | 영어 | - |
dc.publisher | American Chemical Society | - |
dc.title | High-efficiency polycrystalline perovskite light-emitting diodes based on mixed cations | - |
dc.type | Article | - |
dc.contributor.AlternativeAuthor | 이태우 | - |
dc.identifier.doi | 10.1021/acsnano.8b00409 | - |
dc.citation.journaltitle | ACS Nano | - |
dc.identifier.wosid | 000428972600082 | - |
dc.identifier.scopusid | 2-s2.0-85044543236 | - |
dc.citation.endpage | 2892 | - |
dc.citation.number | 3 | - |
dc.citation.startpage | 2883 | - |
dc.citation.volume | 12 | - |
dc.identifier.sci | 000428972600082 | - |
dc.description.isOpenAccess | N | - |
dc.contributor.affiliatedAuthor | Lee, Tae-Woo | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | ORGANOMETAL HALIDE PEROVSKITE | - |
dc.subject.keywordPlus | FORMAMIDINIUM LEAD BROMIDE | - |
dc.subject.keywordPlus | SOLAR-CELLS | - |
dc.subject.keywordPlus | THIN-FILMS | - |
dc.subject.keywordPlus | OPTICAL-PROPERTIES | - |
dc.subject.keywordPlus | CARRIER DYNAMICS | - |
dc.subject.keywordPlus | ION MIGRATION | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | PHOTOLUMINESCENCE | - |
dc.subject.keywordPlus | NANOCRYSTALS | - |
dc.subject.keywordAuthor | cation hybridization | - |
dc.subject.keywordAuthor | formamidinium lead bromide | - |
dc.subject.keywordAuthor | A-site cations | - |
dc.subject.keywordAuthor | alternative emitters | - |
dc.subject.keywordAuthor | composition control | - |
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