Abstract
In this paper, we propose a technique to enable efficient and rigorous
modeling of light emission in planar organic light-emitting diodes (OLEDs)
composed of an arbitrary number of layers with different permittivity (including
metals of a complex permittivity). The effects of the change of exciton radiative
decay rate are explicitly included in the simulation. The numerical implementation
of the technique is comprehensively discussed through an illustrative example.
By using the proposed method, a bottom emitting OLED with a thick glass substrate
is rigorously analyzed. The calculated results show a good agreement with
the experimental results. The proposed method is efficient and well suited
for optimizing OLEDs with complicated device structures. As a demonstration,
we optimize the two-unit tandem top-emitting OLEDs with three types of charge
generating layer. The results and design guidelines are given and discussed
in detail.
© 2007 IEEE
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