Polar semiconductor hole transporting material
AssigneesCambridge Display Technology Limited, CDT Oxford Limited
InventorsCarl R. Towns, Mary J. McKiernan, Annette Steudel
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Abstract
A semiconductive hole transport material containing polar substituent groups, the polar substituent groups substantially not affecting the electronic properties of the hole transport material and the hole transport material being soluble in a polar solvent.
Claims12
An organic electronic device comprising an emissive layer and a hole-transporting layer, said hole-transporting layer comprising a semiconductive hole transport polymer containing fluorene, spirofluorene, indenofluorene, phenylene, phenylenevinylene, thiophene, benzothiadiazole, carbazole, or triarylamine repeat units in a backbone of the polymer, at least some of which repeat units have polar substituent groups, wherein said polar substituent groups do not substantially affect the electronic properties of the hole transport polymer, and the hole transport polymer is soluble in a polar solvent.
Dependencies are inferred from the claim text.