Polar semiconductor hole transporting material
AssigneesCambridge Display Technology Limited, CDT Oxford Limited
InventorsCarl R. Towns, Caroline 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.
Claims41
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.
A method for forming an organic electronic device, including the steps of:
- depositing a semiconductive hole transport material from solution in a polar solvent to form a hole transport layer;
- and subsequently
- forming a second layer by depositing on the hole transport layer a second material from solution in a non-polar solvent in which the hole transport layer is substantially insoluble;
- and characterised in that the hole transport material contains polar substituent groups selected so that the hole transport material is soluble in the polar solvent, the second material being substantially insoluble in the polar solvent.
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A method for forming an organic electronic device, including the steps of:
- depositing a first polymer from solution in a first solvent to form a first layer of the device;
- and subsequently
- forming a second layer of the device by depositing a second polymer from solution in a second solvent in which the first layer is substantially insoluble;
- where either the first solvent or the second solvent is a polar solvent;
- and where the first polymer or the second polymer contains polar substituent groups selected so that the first polymer or the second polymer is soluble in the polar solvent, the other of the first polymer and the second polymer being substantially insoluble in the polar solvent;
- and characterised in that the first polymer comprises a repeat unit Ar1 and the second polymer comprises a repeat unit Ar2, where Ar1 and Ar2 comprise the same aryl or heteroaryl group.
A method for forming an organic electronic device, including the steps of:
- forming a conducting layer comprising a conducting material, said conducting material containing polar groups;
- and
- forming a hole transport layer comprising a semiconductive hole transport material on the conducting layer, said hole transport material containing polar substituent groups.
Dependencies are inferred from the claim text.