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DC Field | Value | Language |
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dc.citation.number | 5 | - |
dc.citation.startPage | 2005400 | - |
dc.citation.title | ADVANCED MATERIALS | - |
dc.citation.volume | 33 | - |
dc.contributor.author | Myung, Chang Woo | - |
dc.contributor.author | Kim, Kwang S. | - |
dc.date.accessioned | 2023-12-21T16:16:55Z | - |
dc.date.available | 2023-12-21T16:16:55Z | - |
dc.date.created | 2021-02-03 | - |
dc.date.issued | 2021-02 | - |
dc.description.abstract | Closed-shell light-emitting diodes (LEDs) suffer from the internal quantum efficiency (IQE) limitation imposed by optically inactive triplet excitons. Here, an unrevealed emission mechanism of lead halide perovskites (LHPs) APbX(3) (A = Cs/CN2H5; X = Cl/Br/I) that circumvents the efficiency limit of closed-shell LEDs is explored. Though efficient emission is prohibited by optically inactive J = 0 in inversion symmetric LHPs, the anharmonicity arising from stereochemistry of Pb and resonant orbital-bonding network along the imaginary A(+ horizontal ellipsis )X(-)(T-1u) transverse optical (TO) modes, breaks inversion symmetry, introducing disorder and Rashba-Dresselhaus spin-orbit coupling (RD-SOC). This results in bright cohelical and dark antihelical excitons. Many-body theory and first-principles calculations show that the optically active cohelical exciton is the lowest excited state in organic/inorganic LHPs. Thus, RD-SOC can drive to achieve the ideal 50% IQE by utilizing anharmonicity, much over the 25% IQE limitation for closed-shell LEDs. | - |
dc.identifier.bibliographicCitation | ADVANCED MATERIALS, v.33, no.5, pp.2005400 | - |
dc.identifier.doi | 10.1002/adma.202005400 | - |
dc.identifier.issn | 0935-9648 | - |
dc.identifier.scopusid | 2-s2.0-85097665850 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/49942 | - |
dc.identifier.url | https://onlinelibrary.wiley.com/doi/10.1002/adma.202005400 | - |
dc.identifier.wosid | 000599628800001 | - |
dc.language | 영어 | - |
dc.publisher | WILEY-V C H VERLAG GMBH | - |
dc.title | Anharmonicity-Driven Rashba Cohelical Excitons Break Quantum Efficiency Limitation | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter | - |
dc.relation.journalResearchArea | Chemistry; Science & Technology - Other Topics; Materials Science; Physics | - |
dc.type.docType | Article; Early Access | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | anharmonic disorder | - |
dc.subject.keywordAuthor | excitons | - |
dc.subject.keywordAuthor | lead halide perovskites | - |
dc.subject.keywordAuthor | light‐ | - |
dc.subject.keywordAuthor | emitting diodes | - |
dc.subject.keywordAuthor | quantum efficiencies | - |
dc.subject.keywordPlus | HALIDE | - |
dc.subject.keywordPlus | ENERGIES | - |
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