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Song, Myoung Hoon
Organic Photonics & Optoelectronics Lab
Research Interests
  • Organic optoelectrics, perovskite light-emitting diodes, surface treatment, photonic crystals

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High-Performance Perovskite Light-emitting Diodes via Morphological Control of Perovskite Film

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dc.contributor.authorYu, Jae Choulko
dc.contributor.authorKim, Da Binko
dc.contributor.authorJung, Eui Daeko
dc.contributor.authorLee, Bo Ramko
dc.contributor.authorSong, Myoung Hoonko
dc.date.available2016-02-11T05:33:04Z-
dc.date.created2016-01-15ko
dc.date.issued201604ko
dc.identifier.citationNANOSCALE, v.8, no.13, pp.7036 - 7042ko
dc.identifier.issn2040-3364ko
dc.identifier.urihttp://scholarworks.unist.ac.kr/handle/201301/18382-
dc.identifier.urihttp://pubs.rsc.org/en/content/articlelanding/2015/nr/c5nr05604g#!divAbstractko
dc.description.abstractSolution-processable perovskite materials have garnered tremendous attention because of their excellent charge carrier mobility, possibility of a tunable optical bandgap, and high photoluminescence quantum efficiency (PLQE). In particular, the uniform morphology of a perovskite film is the most important factor in realizing perovskite light-emitting diodes (PeLEDs) with high efficiency and full-coverage electroluminescence (EL). In this study, we demonstrate highly efficient PeLEDs that contain a perovskite film with a uniform morphology by introducing HBr into the perovskite precursor. The introduction of HBr into the perovskite precursor results in a perovskite film with a uniform, continuous morphology because the HBr increases the solubility of the inorganic component in the perovskite precursor and reduces the crystallization rate of the perovskite film upon spin-coating. Moreover, PeLEDs fabricated using perovskite films with a uniform, continuous morphology, which were deposited using 6 vol% HBr in a dimethylformamide (DMF)/hydrobromic acid (HBr) cosolvent, exhibited full coverage of the green EL emission. Finally, the optimized PeLEDs fabricated with perovskite films deposited using the DMF/HBr cosolvent exhibited a maximum luminance of 3490 cd m−2 (at 4.3 V) and a luminous efficiency of 0.43 cd A−1 (at 4.3 V).ko
dc.description.statementofresponsibilityopen-
dc.languageENGko
dc.publisherROYAL SOC CHEMISTRYko
dc.subjectEfficiencyko
dc.subjectElectroluminescenceko
dc.subjectLightko
dc.subjectLight emitting diodesko
dc.subjectMorphologyko
dc.subjectOrganic solvents Crystallization ratesko
dc.subjectInorganic componentsko
dc.subjectLuminous efficiencyko
dc.subjectMaximum luminanceko
dc.subjectMorphological controlko
dc.subjectPerovskite filmsko
dc.subjectPhotoluminescence quantum efficiencyko
dc.subjectSolution processableko
dc.titleHigh-Performance Perovskite Light-emitting Diodes via Morphological Control of Perovskite Filmko
dc.typeARTICLEko
dc.identifier.pid1045null
dc.identifier.rimsid25213ko
dc.identifier.scopusid2-s2.0-84962010030ko
dc.identifier.wosid000373060600014ko
dc.type.rimsAko
dc.identifier.doihttp://dx.doi.org/10.1039/C5NR05604Gko
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