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- W2023355724 abstract "Alkyl substituted polyfluorenes are promising candidates for use in organic display applications due to efficient, pure blue (polarized) luminescence, high charge carrier mobility, and good processabilty. Poly(9,${9}^{ensuremath{'}}$-dioctylfluorene) (PFO) is an especially interesting polyfluorene derivative, because of its self-organization into distinct supramolecular structures at room temperature. In addition to the amorphous glassy phase, PFO exhibits a unique packing behavior, the so-called $ensuremath{beta}$-phase formation, which leads to a higher degree of organization. We show that the $ensuremath{beta}$-phase is an energetically favorable environment for charge carriers. We look into the migration of charges from glassy polyfluorene to areas where PFO exhibits $ensuremath{beta}$-phase organization and find that the charge carrier mobility is higher in $ensuremath{beta}$-phase polyfluorene than in glassy polyfluorene. Our results illustrate that the order on a supramolecular scale determines the conductive properties of conjugated polymers to a large extent. We conclude that the performance of devices based on polyfluorene can be significantly improved by the enhancement of the supramolecular order." @default.
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- W2023355724 date "2006-09-27" @default.
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- W2023355724 title "Enhanced charge-carrier mobility in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>β</mml:mi></mml:math>-phase polyfluorene" @default.
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- W2023355724 doi "https://doi.org/10.1103/physrevb.74.113203" @default.
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