Photoinduced Charge Carrier Generation in Blends of Poly(Thienothiophene) Derivatives and [6,6]-Phenyl-C61-butyric Acid Methyl Ester: Phase Segregation versus Intercalation - Savenije,TJ; Grzegorczyk,WJ; Heeney,M; Tierney,S; McCulloch,I; Siebbeles,LDA (JOURNAL OF PHYSICAL CHEMISTRY C, 2010)