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Lateral Dye Distribution With Ink-Jet Dye Doping of Polymer Organic Light Emitting Diodes

Published online by Cambridge University Press:  10 February 2011

Conor F. Madigan ,
Thomas R. Hebner ,
J. C. Sturm ,
Richard A. Register  and
Sandra Troian
Conor F. Madigan
Affiliation:
Department of Electrical Engineering, Princeton University, Princeton, NJ 08544
Thomas R. Hebner
Affiliation:
Department of Electrical Engineering, Princeton University, Princeton, NJ 08544
J. C. Sturm
Affiliation:
Department of Electrical Engineering, Princeton University, Princeton, NJ 08544
Richard A. Register
Affiliation:
Department of Chemical Engineering, Princeton University, Princeton, NJ 08544
Sandra Troian
Affiliation:
Department of Chemical Engineering, Princeton University, Princeton, NJ 08544
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Abstract

In this work we investigate the lateral dye distribution resulting from the dye doping of a thin polymer film by ink-jet printing (IJP) for the integration of color organic light emitting diodes (OLED's). The dye is found to segregate into distinct outer rings following rapid droplet evaporation, while slower evaporation rates are found to significantly reduce (or eliminate) this effect. The dye segregation phenomena are found to depend critically on the mechanisms of droplet evaporation. Good dye uniformity was obtained using a low vapor pressure solvent, and integrated, 250 micron red, green, and blue polymer organic light emitting diodes (OLED's) were fabricated with this technique. These devices had good color uniformity over most of the device area and similar electrical properties to comparable spin-coated devices without IJP.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 625: Symposium Y – Solid Freeform & Additive Fabrication – 2000 , 2000 , 123
Copyright
Copyright © Materials Research Society 2000

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References

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