The Effect of Ionization Potential and Film Morphology on Exciplex Formation and Charge Generation in Blends of Polyfluorene Polymers and Silole Derivatives
| Autor: | William J. Mitchell, Clare Dyer-Smith, Jenny Nelson, Donal D. C. Bradley, Sean E. Shaheen, Jessica J. Benson-Smith, Saif A. Haque, Hideyuki Murata |
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| Rok vydání: | 2009 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymer Photochemistry Excimer Acceptor Surfaces Coatings and Films Electronic Optical and Magnetic Materials Polyfluorene chemistry.chemical_compound General Energy chemistry Atomic orbital Copolymer Quantum efficiency Physical and Theoretical Chemistry Ionization energy |
| Zdroj: | The Journal of Physical Chemistry C. 113:14533-14539 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | Long-lived emission from an exciplex state is observed in a series of blend films of polyfluorene−triarylamine copolymers with silole derivatives. The energy of the exciplex emission is found to correlate with the energy offset between the frontier orbitals of donor and acceptor, whereas the yield of the exciplex is more strongly influenced by blend film morphology. Charge separation occurs in these films, and the external quantum efficiency of photovoltaic devices is found to depend upon both the energetics and the morphology of the blend film. |
| Databáze: | OpenAIRE |
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