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Song, Myoung Hoon
Organic Photonics & Optoelectronics Lab.
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dc.citation.startPage 100755 -
dc.citation.title MATERIALS TODAY ENERGY -
dc.citation.volume 21 -
dc.contributor.author Park, Jong Hyun -
dc.contributor.author Harit, Amit Kumar -
dc.contributor.author Jang, Chung Hyeon -
dc.contributor.author Jeong, Ji-Eun -
dc.contributor.author Woo, Han Young -
dc.contributor.author Song, Myoung Hoon -
dc.date.accessioned 2023-12-21T15:18:39Z -
dc.date.available 2023-12-21T15:18:39Z -
dc.date.created 2021-06-16 -
dc.date.issued 2021-09 -
dc.description.abstract Charge carrier confinement and defect passivation are the main research struggle for the development of efficient perovskite light-emitting diodes (PeLEDs). In this study, we report a green-emitting PeLED by adding an anionic conjugated polyelectrolyte containing tetraethylammonium counter ions (MPS2-TEA) into formamidinium lead tribromide quasi-2D perovskites. X-ray diffraction shows that perovskite films with MPS2-TEA are more randomly oriented compared to the films without MPS2-TEA. Interestingly, the incorporation of MPS2-TEA reduces the roughness of surfaces and grain sizes of the perovskite films. The increases in photoluminescence intensity (by three times) and lifetime (18.11 vs. 9.81 ns) of perovskite films with MPS2-TEA compared to those of the pristine films suggest improved radiative recombination by intermixing perovskite with MPS2-TEA. Defect density in perovskite films with MPS2-TEA is significantly suppressed owing to defect passivation at the grain boundaries by MPS2-TEA. The PeLED with MPS2-TEA shows a significantly improved external quantum efficiency of up to 15.47%, the current efficiency of 69.02 cd/A, and maximum luminance of 12,252 cd/m(2), compared to a device without MPS2-TEA. (C) 2021 Elsevier Ltd. All rights reserved. -
dc.identifier.bibliographicCitation MATERIALS TODAY ENERGY, v.21, pp.100755 -
dc.identifier.doi 10.1016/j.mtener.2021.100755 -
dc.identifier.issn 2468-6069 -
dc.identifier.scopusid 2-s2.0-85105551377 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/53020 -
dc.identifier.url https://www.sciencedirect.com/science/article/pii/S2468606921001209?via%3Dihub -
dc.identifier.wosid 000701784300011 -
dc.language 영어 -
dc.publisher ELSEVIER SCI LTD -
dc.title Efficient green-emitting perovskite light-emitting diodes using a conjugated polyelectrolyte additive -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Chemistry, PhysicalEnergy & FuelsMaterials Science, Multidisciplinary -
dc.relation.journalResearchArea ChemistryEnergy & FuelsMaterials Science -
dc.type.docType Article -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor Light-emitting diodesConjugated polyelectrolytesPolymer additivesCrystal growthDefect passivation -
dc.subject.keywordPlus PERFORMANCEPASSIVATION -

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