Direct observation of intersystem crossing in charge-pair states in polyfluorene polymer blends
Graphical abstract
Triplet exciton formation occurs over 100 ns after photoexcitation in F8BT–PFB polymer blend films showing that intersystem crossing occurs in precursor charge-pairs.
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Acknowledgements
We are grateful to I.A. Howard and Professor R.H. Friend for useful discussions, and to the Engineering and Physical Sciences Research Council, UK for funding, including the Supergen programme ‘Excitonic Solar Cells’. H.O. is grateful for support from the Scientist Exchange Program between the Japan Society for the Promotion of Science (JSPS) and the Royal Society.
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