Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Su, HJ | en_US |
dc.contributor.author | Wu, FI | en_US |
dc.contributor.author | Shu, CF | en_US |
dc.contributor.author | Tung, YL | en_US |
dc.contributor.author | Yun, C | en_US |
dc.contributor.author | Lee, GH | en_US |
dc.date.accessioned | 2014-12-08T15:19:42Z | - |
dc.date.available | 2014-12-08T15:19:42Z | - |
dc.date.issued | 2005-02-15 | en_US |
dc.identifier.issn | 0887-624X | en_US |
dc.identifier.uri | http://dx.doi.org/10.1002/pola.20569 | en_US |
dc.identifier.uri | http://hdl.handle.net/11536/14001 | - |
dc.description.abstract | We present a short, efficient synthetic route for the preparation of a novel polyfluorene copolymer (PF-Q) containing two electron-deficient, 2,4-diphenylquinoline groups functionalized at the C-9 positions of alternate fluorene units that form a three-dimensional cardostructure. The presence of the rigid bulky pendent groups leads to a polyfluorene possessing a high glass-transition temperature (207 degreesC) and very good thermal stability (5% weight loss observed at 460 degreesC). A photoluminescence study revealed that the Forster energy transfer from the excited quinoline groups to the polyfluorene backbone is Very efficient; it also demonstrated that, the commonly observed aggregate/excimer formation in polyfluorenes is suppressed very effectively, in this polymer, even after it has been annealed at 150 degreesC for 20 h. A light emitting diode (LED) device prepared with PF-Q as the emitting layer exhibits a stable blue emission with a maximum brightness of 1121 cd/m(2) at 12 V and a maximum external quantum efficiency of 0.80% at 250 cd/m(2). We also used PF-Q, which contains diphenylquinoline units that behave as electron-transporting side chains, as a host. material and doped it with 2.4 wt % of a red-emitting phosphorescent dye, Os(fppz). to realize a red electrolumineseence with CIE color coordinates of (0.66, 0.34). The doped device exhibits a maximum external quantum efficiency of 6.63% (corresponding a luminance efficiency of 8.71 cd/A) at a current density of 47.8 mV/cm(2) together with a maximum brightness of 10457 cd/m(2). (C) 2005 Wiley Periodicals, Inc. | en_US |
dc.language.iso | en_US | en_US |
dc.subject | charge transport | en_US |
dc.subject | fluorescence | en_US |
dc.subject | LED | en_US |
dc.subject | polyfluorene | en_US |
dc.subject | quinoline | en_US |
dc.title | Polyfluorene containing diphenylquinoline pendants and their applications in organic light emitting diodes | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1002/pola.20569 | en_US |
dc.identifier.journal | JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | en_US |
dc.citation.volume | 43 | en_US |
dc.citation.issue | 4 | en_US |
dc.citation.spage | 859 | en_US |
dc.citation.epage | 869 | en_US |
dc.contributor.department | 應用化學系 | zh_TW |
dc.contributor.department | Department of Applied Chemistry | en_US |
dc.identifier.wosnumber | WOS:000226675100016 | - |
dc.citation.woscount | 39 | - |
Appears in Collections: | Articles |
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