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AssigneeE. I. Du Pont de Nemours and Company
InventorChi Zhang
Estimating the term…
High resistance PEDT/PSS buffer layers are provided for use in electroluminescent devices such as, e.g., OLEDs. In accordance with another embodiment, there are provided OLEDs comprising high resistance PEDT/PSS buffer layers. In accordance with a further embodiment, methods have been developed for decreasing the conductivity of a PEDT/PSS layer cast from aqueous solution onto a substrate, by adding a cyclic ether co-solvent to the aqueous solution of PEDT/PSS prior to casting. In one embodiment, there are provided methods for decreasing the inherent conductivity of a PEDT/PSS layer cast onto a substrate so that this material can be used as an intermediate buffer layer in red, green, blue organic light emitting diodes (RGB OLEDs).
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A method for decreasing the conductivity of a poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) layer cast from aqueous solution onto a substrate, said method comprising adding an effective amount of at least one cyclic ether co-solvent to said aqueous solution.
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A method for producing a high resistance buffer layer for use in a light emitting diode, said method comprising adding an effective amount of at least one cyclic ether co-solvent to an aqueous solution of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate), and casting said solution onto a substrate.
A method for increasing thickness of a poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) layer cast from aqueous solution onto a substrate, said method comprising adding an effective amount of at least one cyclic ether co-solvent to said aqueous solution.
Dependencies are inferred from the claim text.