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- W2322757315 abstract "Exciton and charge dynamics of poly(3-hexylthiophene) (P3HT) blended with covalently linked monomeric (MP), dimeric (BP), or trimeric (TP) fullerene derivatives are investigated by using near-infrared time-resolved absorption spectroscopy under low excitation photon fluence. A low blending ratio (10%, w/w) of the fullerene derivative allows us to examine the effect of linked-fullerene number on charge photogeneration. With reference to P3HT:MP, the P3HT:BP blend shows a one-fold higher exciton dissociation rate and significantly alleviated nongeminate charge recombination in spite of a similar P3HT packing order. However, TP with even larger size tends to aggravate the geminate and nongeminate recombination in picosecond-to-nanosecond time scales. The primary exciton and charge dynamics are discussed in correlation with the nanoscopic film morphology. The results suggest that the dumbbelled fullerene derivative BP as an electron-withdrawing material is promising in boosting the free charge photoproduction in polymer solar cells." @default.
- W2322757315 created "2016-06-24" @default.
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- W2322757315 date "2014-09-04" @default.
- W2322757315 modified "2023-10-18" @default.
- W2322757315 title "Charge Photogeneration Dynamics of Poly(3-hexylthiophene) Blend with Covalently-Linked Fullerene Derivative in Low Fraction" @default.
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- W2322757315 doi "https://doi.org/10.1021/jp507353g" @default.
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