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Ward, Alexander J.; Ruseckas, Arvydas; Kareem, Mohanad Mousa; Ebenhoch, Bernd; Serrano, Luis A.; Al-Eid, Manal; Fitzpatrick, Brian; Rotello, Vincent M.; Cooke, Graeme; Samuel, Ifor D. W.
Advanced materials, April 17, 2015, Letnik: 27, Številka: 15Journal Article
The effect of acceptor energy level on electron transfer rate in blends of the polymer solar‐cell material poly4,8‐bis(2‐ethylhexyl)oxybenzo1,2‐b:4,5‐b′dithiophene‐2,6‐diyl3‐fluoro‐2‐(2‐ethylhexyl)carbonylthieno3,4‐bthiophenediyl (PTB7) is studied using time‐resolved fluorescence. Fast electron transfer in less than 2 ps is observed for a driving force between 0.2 and 0.6 eV and the electron transfer is slower outside this range. This dependence is described by Marcus theory with a reorganization energy of ≈0.4 eV.
