Hamburg 2001 – scientific programme

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SYOF: Organische Festkörper

SYOF 4: Optical Properties

SYOF 4.5: Invited Talk

Tuesday, March 27, 2001, 16:10–16:50, S6

Polymer Morphology Control of Optoelectronic Properties — •Donal Bradley — Blackett Laboratory, Imperial College, London, UK

The use of polymer morphology to control optoelectronic properties is an area with many opportunities for innovation and technological advance. Ordering can lead to anisotropic light emission and transport and improved carrier mobility. In blends, the phase structure is important for optimisation of injection/extraction and combination/separation of carriers and hence LED and photovoltaic device performance. Polarised and higher peak brightness LEDs, higher mobility FETs, more efficient photovoltaic cells and reduced threshold lasers and amplifiers can be anticipated via control of morphology. Here, I will discuss our programme of work concerning the polyfluorene polymers and their blends, presenting results for mobility enhancement, polarised light emission, the optimisation of polymer/polymer blends for LEDs and photovoltaics and the reduction of thresholds for gain narrowing.