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Lecture Emil J.W. List

Roster

WhenWhere
30 June 2006 FWN-Building 5114.0004, Nijenborgh 4, 9747 AG, Groningen
Speaker:Prof. Emil J.W. List
Affiliation:Christian Doppler Laboratory Advanced Functional Materials, Insitute Solid State Physics, Graz University; Insitute of Nanostructured Materials and photonics, Joanneum Research, Weiz; NanoTecCenter Weiz Forschungsgesellschaft mbH, Weiz, Austria
Title:Structure to property relationships in blue light emitting conjugated polymers
Date:Fri Jun 30, 2006
Start:15.00
Location:FWN-Building 5114.0004
Host:M.A. Loi
Telephone:+31 50 363 4119

Abstract

As part of the development of display applications based on conjugated polymers, significant attention has recently been directed to attaining stable blue electroluminescence from poly(para-phenylene)-type (PPP-type) polymers, The generation of blue light is of crucial importance for red-green-blue (RGB) full color light emitting devices. Moreover, it can be transformed into red and green light via internal or external color conversion. Among polyphenylene-based materials highly emissive polyfluorenes (PFs) have received particular attention during the last decade as a promising class of conjugated polymers, which can be used as blue light emitting materials in PLEDs. The excellent optical and electronic properties of 9,9-disubstituted polyfluorenes, poly(indenofluorene)s (PIF), and fluorene-based copolymers have brought this class of materials into the focus of scientific and industrial interest. Since PFs, PIFs, PPP-type ladder polymers (LPPP) and other bridged PPPs are an intensively studied class of polymers this contribution can only give a short overview which summarizes some of the most attractive outcomes and trends of the last years. Following a basic and short overview the contribution will focus on the optical and electrical properties of (para-phenylene)-type polymers with an increasing degree of aryl-aryl bridging and on the defect formation in PPP-type light emitting polymers -low energy electro- and photoluminescence bands and their origin in carbonyl-type defects. An outlook towards novel synthetic strategies for PPP-type polymers with minimum amount of chemical and electronic defects will be given.
Last modified:22 October 2012 2.30 p.m.