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Title: Novel deep blue fluorescent fluorene-based copolymer containing hole-transporting arylamine segments
Authors: Liu, B. 
Huang, W. 
Keywords: Hole-transporting
Light-emitting diodes
Ullmann reaction
Issue Date: 30-Sep-2002
Citation: Liu, B., Huang, W. (2002-09-30). Novel deep blue fluorescent fluorene-based copolymer containing hole-transporting arylamine segments. Thin Solid Films 417 (1-2) : 206-210. ScholarBank@NUS Repository.
Abstract: A novel conjugated copolymer-poly((9,9-dioctylfluorene)-alt-(N,N′-diphenylbenzidine)), bearing an arylamine moiety in the polymer backbone, has been synthesized by a modified Ullmann reaction. The new polymer can be easily dissolved in common organic solvents and form uniform thin films. The NMR and FT-IR spectra showed that it has a well-defined structure. Thermogravimetric analyses and differential scanning calorimetry analyses indicated that the polymer exhibits good thermal stability with the onset decomposition temperature in nitrogen at 300 °C and a glass-transition temperature (Tg) at 148 °C. The UV and photoluminescence spectra of the film samples indicate that the polymer has a band gap of 2.83 eV and deep blue light-emission. Cyclic voltammetry illustrated that the polymer can be reversibly p-doped and dedoped at rather low oxidative potential compared with poly(dialkylfluorene), implying that the new polymer has better hole-transporting property. All the results demonstrate that the obtained polymer is a promising deep blue light emission or hole-transporting material for PLED applications. © 2002 Elsevier Science B.V. All rights reserved.
Source Title: Thin Solid Films
ISSN: 00406090
DOI: 10.1016/S0040-6090(02)00664-8
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