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dc.contributor.authorYang, X.en_US
dc.contributor.authorDev, K.en_US
dc.contributor.authorWang, J.en_US
dc.contributor.authorMutlugun, E.en_US
dc.contributor.authorDang, C.en_US
dc.contributor.authorZhao Y.en_US
dc.contributor.authorLiu, S.en_US
dc.contributor.authorTang, Y.en_US
dc.contributor.authorTan S.T.en_US
dc.contributor.authorSun, X. W.en_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.date.accessioned2015-07-28T12:02:28Z
dc.date.available2015-07-28T12:02:28Z
dc.date.issued2014en_US
dc.identifier.issn1616-301X
dc.identifier.urihttp://hdl.handle.net/11693/12670
dc.description.abstractA colloidal quantum dot light-emitting diode (QLED) is reported with substantially enhanced light extraction efficiency by applying a layer of large-scale, low-cost, periodic nanopillar arrays. Zinc oxide nanopillars are grown on the glass surface of the substrate using a simple, efficient method of non-wetting templates. With the layer of ZnO nanopillar array as an optical outcoupling medium, a record high current efficiency (CE) of 26.6 cd/A is achieved for QLEDs. Consequently, the corresponding external quantum efficiency (EQE) of 9.34% reaches the highest EQE value for green-emitting QLEDs. Also, the underlying physical mechanisms enabling the enhanced light-extraction are investigated, which leads to an excellent agreement of the numerical results based on the mode theory with the experimental measurements. This study is the first account for QLEDs offering detailed insight into the light extraction efficiency enhancement of QLED devices. The method demonstrated here is intended to be useful not only for opening up a ubiquitous strategy for designing high-performance QLEDs but also with respect to fundamental research on the light extraction in QLEDs.en_US
dc.language.isoEnglishen_US
dc.source.titleAdvanced Functional Materialsen_US
dc.relation.isversionofhttp://dx.doi.org/10.1002/adfm.201400190en_US
dc.subjectQuantum dotsen_US
dc.subjectNanocrystalsen_US
dc.subjectLight-emitting diodesen_US
dc.subjectLight outcouplingen_US
dc.subjectNanopillarsen_US
dc.subjectCore-shell nanocrystalsen_US
dc.subjectLow-hazeen_US
dc.subjectOledsen_US
dc.subjectElectroluminescenceen_US
dc.subjectDisplaysen_US
dc.subjectDevicesen_US
dc.titleLight extraction efficiency enhancement of colloidal quantum dot light-emitting diodes using large-scale nanopillar arraysen_US
dc.typeArticleen_US
dc.departmentDepartment of Physicsen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.citation.spage5977en_US
dc.citation.epage5984en_US
dc.citation.volumeNumber24en_US
dc.citation.issueNumber38en_US
dc.identifier.doi10.1002/adfm.201400190en_US
dc.publisherWiley-VCH Verlagen_US
dc.contributor.bilkentauthorDemir, Hilmi Volkan


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