Solution processing of polymer semiconductor: Insulator blends—Tailored optical properties through liquid–liquid phase separation control |
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| Authors: | Christoph Hellmann Neil D. Treat Alberto D. Scaccabarozzi Joseph Razzell Hollis Franziska D. Fleischli James H. Bannock John de Mello Jasper J. Michels Ji‐Seon Kim Natalie Stingelin |
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| Affiliation: | 1. Department of Materials and Centre for Plastic Electronics, Imperial College London, London, United Kingdom;2. Department of Physics and Centre for Plastic Electronics, Imperial College London, London, United Kingdom;3. Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London, United Kingdom;4. Max Planck Institute for Polymer Research, Mainz, Germany |
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| Abstract: | It has been demonstrated that the 0‐0 absorption transition of poly(3‐hexylthiophene) (P3HT) in blends with poly(ethylene oxide) (PEO) could be rationally tuned through the control of the liquid–liquid phase separation process during solution deposition. Pronounced J‐like aggregation behavior, characteristic for systems of a low exciton band width, was found for blends where the most pronounced liquid–liquid phase separation occurred in solution, leading to domains of P3HT and PEO of high phase purity. Since liquid–liquid phase separation could be readily manipulated either by the solution temperature, solute concentration, or deposition temperature, to name a few parameters, our findings promise the design from the out‐set of semiconductor:insulator architectures of pre‐defined properties by manipulation of the interaction parameter between the solutes as well as the respective solute:solvent system using classical polymer science principles. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2015 , 53, 304–310 |
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| Keywords: | blends conjugated polymers liquid‐liquid phase separation photophysics Spano Model |
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