Photoinduced Electron Transfer in Sexithiophene/Fullerene Derivative Blends: Evidence of Long-Lived Spin Correlated Radical Pairs

Photoinduced electron transfer between sexithiophene and fullerene derivatives in the solid phase has been studied by transient EPR spectroscopy: spin correlated radical pairs were observed having a lifetime of 10 ms and mean distance of 20 Å.