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- W857186689 abstract "Abstract Photochemical properties of regioregular poly(3-hexylthiophene) (P3HT), fullerene derivative [6,6]-phenyl C61-butyric acid methyl ester (PC 60 BM) and their 1:1 mixture in argon-saturated toluene solution were studied by optical spectroscopy and nanosecond laser flash photolysis ( λ ex = 532 nm). Separate excitation of components leads to formation of corresponding triplet state of fullerene ( 3 PC 60 BM*, λ max = 710 nm, ϵ max = 22400 M −1 cm −1 , φ T = 0.29) and polymer ( 3 P3HT*, λ max = 850 nm, ϵ 750 nm ≤ 10 5 M −1 cm −1 , φ T ≥ 0.19). Excitation of P3HT/PC 60 BM mixture leads to effective energy transfer from 3 P3HT* to the ground state of fullerene with a formation of 3 PC 60 BM*. No evidence of ion-radical P3HT + and PC 60 BM − formation was obtained though electron transfer between 3 P3HT* and 1 PC 60 BM is energetically favorable in studied system. Presumably ultrafast back electron transfer takes place in geminate P3HT + /PC 60 BM − pair with regeneration of the ground states of P3HT and PC 60 BM." @default.
- W857186689 created "2016-06-24" @default.
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- W857186689 date "2015-10-01" @default.
- W857186689 modified "2023-09-28" @default.
- W857186689 title "Photochemistry of P3HT and PC 60 BM in toluene solution: Evidence of T–T energy transfer" @default.
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- W857186689 doi "https://doi.org/10.1016/j.jphotochem.2015.07.002" @default.
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