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We report time-resolved photoinduced absorption and time-resolved photoconductivity in conducting polymer-C 60 composites. Photoinduced electron transfer occurs at times <1 ps. Two subgap features are observed in the photoinduced absorption of pure poly (3-octylthiophene) (P3OT); these form earlier than 1 ps and decay with s < 5 ps. P3OT mixed with C 60 shows similar spectral features at early times (<1 ps); however, a new spectrum evolves after % 1 ps as a result of electron transfer from P3OTdoi:10.1016/j.cplett.2013.08.069 fatcat:cvgjfs5wpvbvbj5qajnx4hvefi