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Three-Color Doping of Polymer Oleds by Masked Dye Diffusion

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Abstract

A method to locally pattern the distribution of dye by diffusion into the polymer film of organic light-emitting diodes is introduced. Using a large-area diffusion source, the diffusion of dye into the polymer film can be controlled with a shadow mask. The materials used are the polymer poly(9-vinylcarbazole) (PVK) combined with electron transport molecules (PBD), and the dyes bimane, coumarin 6 and Nile red. The temperature dependence of the diffusion is investigated along with the effect of annealing of the polymer film. A model of the dye distribution is introduced and estimations of the dye profile based on this model and PL measurement are discussed. A 3-color integrated device was demonstrated.

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Authors and Affiliations

  1. Department of Electrical Engineering, Center for Photonic and Optoelectronic Materials (POEM), Princeton University, Princeton, NJ, 08544, USA

    F. Pschenitzka & J. C. Sturm

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  1. F. Pschenitzka
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  2. J. C. Sturm
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Pschenitzka, F., Sturm, J.C. Three-Color Doping of Polymer Oleds by Masked Dye Diffusion. MRS Online Proceedings Library 558, 513–518 (1999). https://doi.org/10.1557/PROC-558-513

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  • DOI: https://doi.org/10.1557/PROC-558-513

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