Water-Soluble Lacunary Polyoxometalates with Excellent Electron Mobilities and Hole Blocking Capabilities for High Efficiency Fluorescent and Phosphorescent Organic Light Emitting Diodes

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dc.contributor.authorTountas, Marinos
dc.contributor.authorTopal, Yasemin
dc.contributor.authorKus, Mahmut
dc.contributor.authorErsöz, Mustafa
dc.contributor.authorFakis, Mihalis
dc.contributor.authorArgitis, Panagiotis
dc.contributor.authorVasilopoulou, Maria
dc.date.accessioned2020-03-26T19:31:51Z
dc.date.available2020-03-26T19:31:51Z
dc.date.issued2016
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractHigh performance solution-processed fluorescent and phosphorescent organic light emitting diodes (OLEDs) are achieved by water solution processing of lacunary polyoxometalates used as novel electron injection/transport materials with excellent electron mobilities and hole blocking capabilities. Green fluorescent OLEDs using poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(1,4-benzo-{2,1',3}-thiadiazole)](F8BT) as the emissive layer and our polyoxometalates as electron transport/hole blocking layers give a luminous efficiency up to 6.7 mu m W-1 and a current efficiency up to 14.0 cd A(-1) which remained nearly stable for about 500 h of operation. In addition, blue phosphorescent OLEDs (PHOLEDs) using poly(9-vinylcarbazole) (PVK): 1,3-bis[2(4-tert-butylphenyl)-1,3,4-oxadiazo-5-yl] benzene (OXD-7) as a host and 10.0 wt% FIrpic as the blue dopant in the emissive layer and a polyoxometalate as electron transport material give 12.5 mu m W-1 and 30.0 cd A(-1) power and luminous efficiency, respectively, which are among the best performance values observed to date for all-solution processed blue PHOLEDs. The lacunary polyoxometalates exhibit unique properties such as low electron affinity and high ionization energy (of about 3.0 and 7.5 eV, respectively) which render them as efficient electron injection/hole blocking layers and, most importantly, exceptionally high electron mobility of up to 10(-2) cm(2) V-1 s(-1).en_US
dc.description.sponsorshipGreece and the European Regional Development Fund of the European Union under NSRF; Regional Operational Program of Atticaen_US
dc.description.sponsorshipThis work was performed in the framework of "YDISE" project within GSRT's KRIPIS action, funded by Greece and the European Regional Development Fund of the European Union under NSRF 2007-2013 and the Regional Operational Program of Attica. The authors also thank Selcuk University Research Foundation (BAP PN: 14201047), TUBA, and DPT (PN: 2009K121080).en_US
dc.identifier.doi10.1002/adfm.201504832en_US
dc.identifier.endpage2665en_US
dc.identifier.issn1616-301Xen_US
dc.identifier.issn1616-3028en_US
dc.identifier.issue16en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage2655en_US
dc.identifier.urihttps://dx.doi.org/10.1002/adfm.201504832
dc.identifier.urihttps://hdl.handle.net/20.500.12395/34207
dc.identifier.volume26en_US
dc.identifier.wosWOS:000375125300007en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherWILEY-V C H VERLAG GMBHen_US
dc.relation.ispartofADVANCED FUNCTIONAL MATERIALSen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.titleWater-Soluble Lacunary Polyoxometalates with Excellent Electron Mobilities and Hole Blocking Capabilities for High Efficiency Fluorescent and Phosphorescent Organic Light Emitting Diodesen_US
dc.typeArticleen_US

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