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dc.contributor.authorHsu, Fang-Mingen_US
dc.contributor.authorChien, Chen-Hanen_US
dc.contributor.authorShih, Ping-Ien_US
dc.contributor.authorShu, Ching-Fongen_US
dc.date.accessioned2014-12-08T15:24:00Z-
dc.date.available2014-12-08T15:24:00Z-
dc.date.issued1970-01-01en_US
dc.identifier.issn0897-4756en_US
dc.identifier.urihttp://hdl.handle.net/11536/16688-
dc.description.abstract"We report highly efficient blue electrophosphorescent organic light-emitting diodes (OLEDs) incorporating a bipolar host, 2,7-bis(diphenylphosphine oxide)-9-(9-phenylcarbazol-3-yl)-9-phenylfluorene (PCF), doped with iridium(III) bis[(4,6-difluorophenyl)pyridinato-NC2']picolinate (FIrpic). PCF, which contains diphenylphosphine oxide groups appended onto a carbazole/fluorene hybrid, displays both electron- and hole-tran sporting characteristics, resulting in a low turn-on voltage (2.6 V) and greatly improved power efficiencies. In addition, the sterically hindered structure of PCF provides a compatible environment for the FIrpic dopant, alleviating concentration quenching of the phosphor at high doping levels. The device doped with 28 wt % FIrpic exhibited maximum EL efficiencies of 30.8 cd/A and 26.2 lm/W (at 121 cd/m(2)) /m(2), Even at a high brightness of 1000 cd/m(2) the efficiencies remained high (26.9 cd/A and 19.6 lm/W)."en_US
dc.language.isoen_USen_US
dc.titlePhosphine-Oxide-Containing Bipolar Host Material for Blue Electrophosphorescent Devicesen_US
dc.typeArticleen_US
dc.identifier.journalCHEMISTRY OF MATERIALSen_US
dc.citation.volume21en_US
dc.citation.issue6en_US
dc.citation.epage1017en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.identifier.wosnumberWOS:000264310900007-
dc.citation.woscount91-
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