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Volumn 89, Issue 23, 2014, Pages

Phenomenological model for charge dynamics and optical response of disordered systems: Application to organic semiconductors

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EID: 84902140163     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.89.235201     Document Type: Article
Times cited : (52)

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    • The value of the initial constant is also fixed by the model to (Equation presented). We point out here that this value does not correspond to the actual short-time limit of the correlation function, (Equation presented). This discrepancy arises from the fact that the simple model Eq. (4) is devised to provide a good description of the carrier dynamics at frequencies relevant for diffusion and localization (intermediate and long times), but it has no information on the high-frequency behavior related to the exact form of the electronic bands (short times). Strictly speaking, Eq. (4) holds at times (Equation presented) with (Equation presented) a time of the order of the intermolecular transfer time (Equation presented).
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