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Optical Modeling of Organic Light-Emitting Diode Multilayer Device Structures

Published online by Cambridge University Press:  21 March 2011

K. B. Kahen
K. B. Kahen*
Affiliation:
Research & Development, Eastman Kodak Company, Rochester, New York 14650-2216
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Abstract

We present an exact classical solution to the problem of dipole emission in a planar multilayer organic light-emitting diode (OLED) device. The inputs to the model are the photoluminescence and quantum yield of the emitter material, and the device layer thicknesses and indices of refraction. The results of the model are applied to predicting the radiant intensity of OLEDs as a function of varying device layer thickness. It is shown that the calculated radiances are in excellent agreement with the data; this suggests that at constant current the variation in electroluminescence caused by modifications of the layer thicknesses can be completely accounted for by optical effects. Finally, we present results (for positions both internal and external to the diodes) for the Poynting power distribution from a randomly aligned dipole in the emission layer.

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References

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