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dc.contributor.authorWu, Chung-Wenen_US
dc.contributor.authorTsai, Chien-Minen_US
dc.contributor.authorLin, Hong-Cheuen_US
dc.date.accessioned2014-12-08T15:16:21Z-
dc.date.available2014-12-08T15:16:21Z-
dc.date.issued2006-06-27en_US
dc.identifier.issn0024-9297en_US
dc.identifier.urihttp://dx.doi.org/10.1021/ma060743qen_US
dc.identifier.urihttp://hdl.handle.net/11536/12128-
dc.description.abstractA series of poly( fluorene)s (PFs) containing different generations of poly( benzyl ether) dendritic wedges with oxadiazole (OXD) peripheral functional groups, including copolymers bearing carbazole (CAZ) pendent groups, were synthesized. The dendritic side-chain polymers possessed excellent solubility in common solvents and good thermal stability with decomposition temperatures of 5% weight loss at more than 370 degrees C. Photophysical studies reveal that the photoluminescent ( PL) properties of the dendronized polymers were greatly affected by the size of the dendritic side chains. The G1- and G2-substituted PF derivatives greatly suppress the aggregation PF backbones and thus to induce pure blue PL emission ( with shorter wavelengths than PF). Excitation of the peripheral functional groups leads to substantial energy transfer from the dendrons to the poly( fluorene) backbones. In addition, the excitation of PF bearing G2 dendrons (G2-OXD) at 303 nm creates stronger fluorescence than that at 390 nm, indicating that the intensity of the sensitized emission ( by OXD absorption at 303 nm) is even stronger than that of a direct poly( fluorene) emission ( by PF backbone absorption at 390 nm). Double-layer light-emitting diode ( LED) devices with the configuration of ITO/PEDOT/polymer/LiF/Al were fabricated and reported. The device with PF bearing G0 dendrons and CAZ pendants (G0-OXDCAZ) as an emitter shows a turn-on voltage of 4.5 V and a bright luminescence of 2446 cd/m(2) at 12 V with a power efficiency of 0.24 cd/A at 100 mA/cm(2).en_US
dc.language.isoen_USen_US
dc.titleSynthesis and characterization of poly(fluorene)-based copolymers containing various 1,3,4-oxadiazole dendritic pendantsen_US
dc.typeArticleen_US
dc.identifier.doi10.1021/ma060743qen_US
dc.identifier.journalMACROMOLECULESen_US
dc.citation.volume39en_US
dc.citation.issue13en_US
dc.citation.spage4298en_US
dc.citation.epage4305en_US
dc.contributor.department材料科學與工程學系zh_TW
dc.contributor.departmentDepartment of Materials Science and Engineeringen_US
dc.identifier.wosnumberWOS:000238385900009-
dc.citation.woscount68-
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