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A complete theory that predicts the measured mobility (how fast charges drift in an electric field) is missing.","posed_since":"","precise":"For high-mobility organic semiconductors (rubrene, pentacene, C8-BTBT) at 100 to 300 K, with transfer integrals of order 0.1 eV comparable to thermal fluctuations of these integrals, predict the mobility $\\mu(T)$ (measured about 3e3 to 1.2e4 $\\mathrm{cm}^2/(\\mathrm{statvolt}\\ \\mathrm{s})$ at room temperature in rubrene single crystals, lower in pentacene and C8-BTBT) and its temperature dependence from a microscopic model with ab initio parameters, deciding between transient localization, small-polaron and band pictures. An answer is a theory reproducing $\\mu(T)$ and the Hall and terahertz data.","problem_ref":null,"references":"","settled_by":"Ab initio parametrized nonadiabatic or quantum transport calculations reproducing mobility, Hall effect and optical conductivity on single crystals.","status_note":"","title":"Charge transport mechanism in high-mobility organic 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