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Experiment and Modeling of Conversion of Substrate-Waveguided Modes to Surface-Emitted Light by Substrate Patterning

Published online by Cambridge University Press:  14 March 2011

Min-Hao M. Lu,
Conor F. Madigan and
J. C. Sturm
Min-Hao M. Lu
Affiliation:
Center for Photonic and Optoelectronic Materials, Department of Electrical Engineering, Princeton University, Princeton, NJ 08544, U.S.A.
Conor F. Madigan
Affiliation:
Center for Photonic and Optoelectronic Materials, Department of Electrical Engineering, Princeton University, Princeton, NJ 08544, U.S.A.
J. C. Sturm
Affiliation:
Center for Photonic and Optoelectronic Materials, Department of Electrical Engineering, Princeton University, Princeton, NJ 08544, U.S.A.
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Abstract

To predict the optical power that could be harvested from light emission that is waveguided in the substrate of organic light emitting devices (OLEDs), a quantitative quantum mechanical model of the light emitted into the waveguided modes has been developed. The model was used to compute the exact distribution of energy in external, substrate and ITO/organic modes as a function of the distance of the emission zone from the cathode. The results are compared to the classical ray optics model and to experiments in two-layer OLED devices. Classical ray optics is found to substantially over-predict the light in waveguided modes.

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References

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