Title :
Modeling of Effective Host Mobility for the Simulation of Polymeric Host-Guest Light Emitting Diodes
Author :
Rostami, Ahmad ; Soofi, H.
Author_Institution :
Photonics & Nanocrystal Res. Lab. (PNRL Lab.), Univ. of Tabriz, Tabriz, Iran
Abstract :
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.
Keywords :
carrier density; carrier mobility; electro-optical effects; fluorescence; master equation; optical polymers; organic light emitting diodes; phosphorescence; charge carrier density; conventional drift-diffusion method; disordered polymer; effective host mobility modeling; electric field; energy disorder effect; guest density; host material; host-guest OLED; host-guest layer; master equation approach; organic host-guest structures; organic light emitting diode; parameterization scheme; polymeric fluorescent white LED; polymeric host-guest light emitting diode simulation; polymeric phosphorescent LED; Charge carrier density; Equations; Mathematical model; Organic light emitting diodes; Polymers; Effective mobility; energy disorder; host-guest structure; organic light emitting diodes;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2013.2295322
