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Synthesis of Host Polymers and Guests for Electrophosphorescence
Watkins Scott E.,Chan, Khai Leok,Cho, Sung-Yong,Evans Nicholas R.,Grimsdale Andrew C.,Holmes Andrew B.,Mak Chris S.K.,Sandee Albertus J.,Williams Charlotte K. The Polymer Society of Korea 2007 Macromolecular Research Vol.15 No.2
Significant progress has been realized in the design and synthesis of light emitting polymers that emit over the entire visible spectrum. However, up to seventy-five percent of charge recombination events can lead to triplet states that decay non-radiatively. Following the pioneering work in the field of small molecule organic light emitting devices, it has been found that solution processible iridium polymer complexes can be used to harness the wasted triplet energy. In this paper, new results with respect to the electrophosphorescence of solution processible tethered iridium polymer derivatives are presented. Furthermore, our approaches to the design of new high triplet energy conjugated polymer hosts are also reported.
Random benzotrithiophene-based donor–acceptor copolymers for efficient organic photovoltaic devices
Nielsen, Christian B.,Ashraf, Raja Shahid,Schroeder, Bob C.,D’Angelo, Pasquale,Watkins, Scott E.,Song, Kigook,Anthopoulos, Thomas D.,McCulloch, Iain The Royal Society of Chemistry 2012 Chemical communications Vol.48 No.47
<P>A series of benzotrithiophene-containing random terpolymers for polymer solar cells is reported. Through variations of the two other components in the terpolymers, the absorption profile and the frontier energy levels are optimized and maximum power conversion efficiencies are nearly doubled (5.14%) relative to the parent alternating copolymer.</P> <P>Graphic Abstract</P><P>A series of benzotrithiophene-containing random terpolymers show greatly improved efficiencies in organic photovoltaic devices compared to the parent alternating copolymer. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2cc31934a'> </P>