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- W2131281352 abstract "We determine the efficiencies for the formation of excitons and charge carriers following ultrafast photoexcitation of a semiconducting polymer (MEH-PPV). The simultaneous, quantitative determination of exciton and charge photoyields is achieved through subpicosecond studies of both the real and the imaginary components of the complex conductivity over a wide frequency range. Predominantly excitons, with near-unity quantum efficiency, are generated on excitation, while only a very small fraction ($<{10}^{ensuremath{-}2}$) of free charges are initially excited, consistent with rapid ($ensuremath{sim}100text{ }text{ }mathrm{fs}$) hot exciton dissociation. These initial charges are very short lived, decaying on subpicosecond time scales." @default.
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- W2131281352 date "2004-05-13" @default.
- W2131281352 modified "2023-10-01" @default.
- W2131281352 title "Efficiency of Exciton and Charge Carrier Photogeneration in a Semiconducting Polymer" @default.
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- W2131281352 doi "https://doi.org/10.1103/physrevlett.92.196601" @default.
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