Abstract
An increase in luminance of a polymer light-emitting diode (PLED) was obtained by fabricating a graded doping structure using a vacuum spray method. The small electron transport molecule, Tris(8-hydroxyquinolinato) aluminum(III)(Alq3), was graded dispersed along the film in the direction of growth in the hole transport polymer poly(3-hexylthiophene-2,5-diyl) (P3HT, regiorandom) layer of the PLED, despite being dissolved in the same organic solvent as the polymer. The PLED reported here, which is composed of a graded structure, emitted brighter light than PLEDs composed of pure polymer or of a blend of active layers prepared by spin coating and/or vacuum spray methods.
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Mo, X., Mizokuro, T., Heck, C. et al. Graded doped structure fabricated by vacuum spray method to improve the luminance of polymer light-emitting diodes. Nano-Micro Lett. 1, 19–22 (2009). https://doi.org/10.1007/BF03353600
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DOI: https://doi.org/10.1007/BF03353600