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dc.contributor.authorWu, FIen_US
dc.contributor.authorReddy, DSen_US
dc.contributor.authorShu, CFen_US
dc.contributor.authorLiu, MSen_US
dc.contributor.authorJen, AKYen_US
dc.date.accessioned2014-12-08T15:41:24Z-
dc.date.available2014-12-08T15:41:24Z-
dc.date.issued2003-01-14en_US
dc.identifier.issn0897-4756en_US
dc.identifier.urihttp://dx.doi.org/10.1021/cm020688+en_US
dc.identifier.urihttp://hdl.handle.net/11536/28163-
dc.description.abstractA novel oxdiazole-containing polyfluorene copolymer (PF-OXD) was synthesized by attaching two electron-deficient, 4-tent-butylphenyl-1,3,4-oxadiazole groups onto the C-9 position of the alternating fluorene unit to form a 3-D cardo-structure. This polymer possesses a very high glass transition temperature (T-g: 213 degreesC) and very good thermal stability due to its rigid cardo-linkage. The results from the photoluminescence measurements of the isothermally heated PF-OXD thin film (150 degreesC for 20 h) show that the commonly observed aggregate/excimer formation in polyfluorenes is very effectively suppressed in this polymer due to its 3-D structure and high T-g. A double-layer LED device using this polymer as the emitting layer shows a bright blue emission with a low turn-on voltage at 5.3 V and a high brightness of 2770 cd/m(2) at a drive voltage of 10.8 V. The maximum external quantum efficiency is 0.52% at 537 cd/m(2) with a bias of 7.4 V. The improved device performance over that of poly(9,9-dioctylfluorene) (POF) may be due to better electron injection and transport in PF-OXD and the efficient energy transfer from the OXD side chain to the polyfluorene main chains.en_US
dc.language.isoen_USen_US
dc.titleNovel oxadiazole-containing polyfluorene with efficient blue electroluminescenceen_US
dc.typeArticleen_US
dc.identifier.doi10.1021/cm020688+en_US
dc.identifier.journalCHEMISTRY OF MATERIALSen_US
dc.citation.volume15en_US
dc.citation.issue1en_US
dc.citation.spage269en_US
dc.citation.epage274en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.identifier.wosnumberWOS:000180368000040-
dc.citation.woscount169-
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