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Organic host-guest structures with a disordered polymer as the host material have various applications in the field of organic light emitting diodes such as polymeric phosphorescent LEDs or polymeric fluorescent white LEDs. Effective mobility is a crucial parameter in the simulation of such host-guest OLEDs with conventional drift-diffusion method. In the present paper, the master equation approach is applied to calculate the effective host mobility in a host-guest structure and investigate the effect of energy disorder, guest density, charge carrier density and electric field on this parameter. By employing a parameterization scheme, an accurate model for the effective host mobility is also derived that can be employed for more precise and realistic simulation of OLEDs incorporating a host-guest layer with polymeric host.
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Rostami et al. (2014) studied this question.
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