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J. Mater. Chem., 2007, 17, 3551 - 3554, DOI: 10.1039/b705918n

Efficient flexible polymer light emitting diodes with conducting polymer anodes

J. Huang, X. Wang, A. J. deMello, J. C. deMello and D. D. C. Bradley

We report polymer light emitting diodes fabricated on flexible poly(ethyleneterephthalate) substrates coated with a layer of poly(3,4-ethylene-dioxythiophene) : poly(styrenesulfonate) that was lithographically patterned to define the anode structure. A blend of poly(9,9-dioctylfluorene-co-benzothiadiazole) and poly(9,9-dioctylfluorene-co-N-(4-butylphenyl)diphenylamine) was then spin-coated on top as the emissive layer and the device was completed by vacuum deposition of a LiF/Al bilayer cathode. The resulting yellow light emitting diodes had typical peak power and current efficiencies of 13.7 lm W–1 and 8.8 cd A–1 respectively, which compare well with values for similar devices fabricated on ITO-coated rigid glass substrates. A maximum luminance in excess of 7300 cd m–2 was achieved.

Graphical abstract image for this article (ID: b705918n)