Graded-host phosphorescent light-emitting diodes with high efficiency and reduced roll-off

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buir.contributor.authorDemir, Hilmi Volkan
buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112X
dc.citation.epage012192-7en_US
dc.citation.issueNumber1en_US
dc.citation.spage012192-1en_US
dc.citation.volumeNumber2en_US
dc.contributor.authorLiu, S. W.en_US
dc.contributor.authorSun, X. W.en_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.date.accessioned2016-02-08T09:43:17Z
dc.date.available2016-02-08T09:43:17Z
dc.date.issued2012en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractWe demonstrated graded-host phosphorescent organic light-emitting diodes with high efficiency and reduced efficiency roll-off. The emissive layer of the graded host device consists of both electron and hole transport type hosts, 1,3,5-tris(N-phenylbenzimidazole-2-yl)benzene (TPBI) and 4,4-,4- tris(Ncarbazolyl) triphenylamine, respectively, with graded composition, and the phosphorescent red emitter bis(2-phenylquinoline) (acetylacetonate) iridium(III), which wasuniformly doped into the graded hostmatrix. The graded host device shows improved quantum efficiency and power efficiency with significantly reduced efficiency rolloff as compared to the unipolar-host and double layer heterojunction host devices.en_US
dc.identifier.doi10.1063/1.3701685en_US
dc.identifier.eissn2158-3226en_US
dc.identifier.issn2158-3226
dc.identifier.urihttp://hdl.handle.net/11693/21221
dc.language.isoEnglishen_US
dc.publisherA I P Publishing LLCen_US
dc.relation.isversionofhttp://dx.doi.org/10.1063/1.3701685en_US
dc.source.titleAIP Advancesen_US
dc.subjectAcetylacetonatesen_US
dc.subjectDouble layersen_US
dc.subjectEmissive layersen_US
dc.subjectGraded compositionen_US
dc.subjectHole transportsen_US
dc.subjectHost devicesen_US
dc.subjectPhosphorescent organic light-emitting diodesen_US
dc.subjectPower efficiencyen_US
dc.subjectRed emitteren_US
dc.subjectTriphenyl aminesen_US
dc.subjectBenzeneen_US
dc.subjectHeterojunctionsen_US
dc.subjectIridium compoundsen_US
dc.subjectLight emissionen_US
dc.subjectLight emitting diodesen_US
dc.subjectPhosphorescenceen_US
dc.subjectEfficiencyen_US
dc.titleGraded-host phosphorescent light-emitting diodes with high efficiency and reduced roll-offen_US
dc.typeArticleen_US

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Department of Electrical and Electronics Engineering
Department of Physics
Institute of Materials Science and Nanotechnology (UNAM)