Water dispersible polythiophenes made with polymeric acid colloids
AssigneeE. I. Du Pont de Nemours and Company
InventorsChe-Hsiung Hsu, Yong Cao, Sunghan Kim, Daniel David Lecloux, Chi Zhang
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Abstract
Compositions are provided comprising a continuous liquid aqueous medium having dispersed therein a polydioxythiophene and at least one colloid-forming fluorinated polymeric acid. Films from invention compositions are useful as buffer layers in organic electronic devices, including electroluminescent devices, such as, for example, organic light emitting diodes (OLED) displays.
Claims11
A stable colloid particle containing composition comprising a continuous liquid aqueous medium having dispersed therein a polydioxythiophene and at least one colloid-forming fluorinated polymeric acid, and further comprising an additional material selected from the group consisting of polymers, dyes, carbon nanotubes, metal nanowires, coating aids, organic and inorganic conductive inks and pastes, charge transport materials, crosslinking agents, and combinations thereof, wherein said polydioxythiophene has the structure:
- wherein:
- R1 and R1′ are each independently selected from hydrogen and alkyl having 1 to 4 carbon atoms,
- or R1 and R1′ taken together form an alkylene chain having 1 to 4 carbon atoms, which may optionally be substituted by alkyl or aromatic groups having 1 to 12 carbon atoms, or a 1,2-cyclohexylene radical, and
- n is greater than about 6;
- wherein the composition does not re-disperse in an aqueous medium after it has been dried.
An organic electronic device having at least one active layer made from a stable colloid particle containing composition comprising a continuous liquid aqueous medium having dispersed therein a polydioxythiophene and at least one colloid-forming fluorinated polymeric acid, and further comprising an additional material selected from the group consisting of polymers, dyes, carbon nanotubes, metal nanowires, coating aids, organic and inorganic conductive inks and pastes, charge transport materials, crosslinking agents, and combinations thereof, wherein said polydioxythiophene has the structure:
- wherein:
- R1 and R′1 are each independently selected from hydrogen and alkyl having 1 to 4 carbon atoms,
- or R1 and R′1 taken together form an alkylene chain having 1 to 4 carbon atoms, which may optionally be substituted by alkyl or aromatic groups having 1 to 12 carbon atoms, or a 1,2-cyclohexylene radical, and
- n is greater than about 6;
- wherein the composition does not re-disperse in an aqueous medium after it has been dried.
Dependencies are inferred from the claim text.