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5 October 1995 Electroluminescence and photoluminescence of conjugated polymers and oligomers
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Conjugated polymers and oligomers are very interesting materials, with a number of possible electronic, optoelectronic, and photonic applications. New synthesis techniques allow the preparation of extremely pure soluble poly(paraphenylenes), showing a steepness at the bandedge comparable to conventional semiconductors. One consequence of this high purity is an improved photoluminescence quantum yield, higher than 24% for thin films. Copolymers of stepladder poly(paraphenylenes) are presented, which can be understood as the polymeric version of quantum well structures. Oligomers of poly(paraphenylene), like p-hexaphenyl can be produced as highly pure, well ordered thin films, which show a high photo-luminescence quantum yield in excess of 30%. All these materials, including an improved poly(phenylenevinylene), are applied as the active layer in light-emitting devices, giving bright light emission in the visible range and we report on their performance and efficiencies. Finally, we present a new preparation technique to produce highly ordered self assembled aromatic oligoazomethines, which are applied as transport layers in multiheterolayer electroluminescence devices.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Guenther Leising, Gabriele Kopping-Grem, Farideh Meghdadi, Arnold Niko, Stefan Tasch, Walter Fischer, Lin Pu, Martin W. Wagner, Robert H. Grubbs, Laurence Athouel, Gerard Froyer, Ullrich Scherf, and Joachim Huber "Electroluminescence and photoluminescence of conjugated polymers and oligomers", Proc. SPIE 2527, Nonlinear Optical Properties of Organic Materials VIII, (5 October 1995);

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