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dc.contributor.authorSu, HJen_US
dc.contributor.authorWu, FIen_US
dc.contributor.authorTseng, YHen_US
dc.contributor.authorShu, CFen_US
dc.date.accessioned2014-12-08T15:18:50Z-
dc.date.available2014-12-08T15:18:50Z-
dc.date.issued2005-07-01en_US
dc.identifier.issn1616-301Xen_US
dc.identifier.urihttp://dx.doi.org/10.1002/adfm.200400269en_US
dc.identifier.urihttp://hdl.handle.net/11536/13546-
dc.description.abstractWe have synthesized a novel polyfluorene copolymer polyfluorene-bis[4-(diphenylamino)styryl]fluorene (PF-DPAS) by orthogonally attaching an amino-substituted distyrylarylene dye bis[4-(diphenylamino)styryl]fluorene, onto the C9 position of a fluorene unit. We have investigated this polymer's thermal properties, electronic properties (viz., absorption and photoluminescence), and electrochemical behavior. Photoluminescence studies indicate that color tuning can be achieved through efficient Forster energy transfer from the higher-energy polyfluorene backbone to the lower-energy pendant DPAS units. We have fabricated light-emitting diodes with the structure indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene) (PEDOT)/ emitting layer/1,3,5-tris(N-phenylbenzimidazol-2-yl)benzene (TPBI)/Mg:Ag. The devices, based on blends of PF-DPAS in polyfluorene-triphenylamine-oxadiazole (PF-TPA-OXD), exhibit significant improvements in device performance relative to that of the pure PF-TPA-OXD device; we attributed this improvement to both a red-shift of the electroluminescence (EL) spectra and an enhancement in quantum efficiency. At a blend ratio of 1:20, the EL spectrum is voltage-independent and stable, and exhibits the characteristic emission of a DPAS moiety: a peak at 461 nm and Commission Internationale de l'Eclairage (CIE) coordinates of (0.1.5, 0.18). The maximum external quantum efficiency is 2.08 % (2.87 cd A(-1)) at a bias of 9 V (86.1 mA cm(-2)) with a brightness of 2467 cd m(-2); the maximum brightness (6916 cd m-2) occurred at an applied voltage of 13 V and a current density of 361 mA cm(-2).en_US
dc.language.isoen_USen_US
dc.titleColor tuning of a light-emitting polymer: Polyfluorene-containing pendant amino-substituted distyrylarylene unitsen_US
dc.typeArticleen_US
dc.identifier.doi10.1002/adfm.200400269en_US
dc.identifier.journalADVANCED FUNCTIONAL MATERIALSen_US
dc.citation.volume15en_US
dc.citation.issue7en_US
dc.citation.spage1209en_US
dc.citation.epage1216en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.identifier.wosnumberWOS:000230734100022-
dc.citation.woscount52-
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