Figure 4From: Ultrafast Dynamics of Localized and Delocalized Polaron Transitions in P3HT/PCBM Blend Materials: The Effects of PCBM ConcentrationTransient absorption decay profiles obtained from the films of P3HT/PCBM blend materials with 1 and 50% PCBM concentration probed close to the P2band. The pump energy is 3.8 eV and the excitation fluence 0.5 mJ/cm2. Thesolid lines represent the fitting results of rate equation model using three exponential termsBack to article page