Method of preparing photoresponsive devices, and devices made thereby
AssigneeCambridge Display Technology Limited
InventorsJonathan J. Halls, Richard H. Friend
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Abstract
A method of preparing an efficient photoresponsive device includes the steps of providing a first electrode on a substrate, providing a layer of an organic material including a blend of at least two semiconductive polymers having different electrode affinities and/or different ionization potentials over the first electrode, providing a second electrode over the layer of organic material, at least one of the electrodes being a transparent or semi-transparent, to form a photoresponsive device, and thermally annealing the photoresponsive device.
Claims20
A method of preparing an efficient photoresponsive device comprising
- (a) forming a photoresponsive device by
- (i) providing a first electrode on a substrate,
- (ii) providing a layer of organic material over said first electrode comprising a blend of at least two semiconductive polymers, said semiconductive polymers having different electron affinities and/or different ionization potentials,
- (iii) providing a second electrode over said layer of organic material,
- wherein at least one of said electrodes is transparent or semi-transparent, and
- (b) thermally annealing said photoresponsive device.
Method according to claim 8 wherein said step of thermally annealing said photoresponsive device comprises heating said device at a temperature between 100° C. and 180° C.
Method of increasing the power conversion efficiency and/or quantum yield of a photoresponsive device comprising a layer of organic material comprising a blend of at least two semiconductive polymers, said semiconductive polymers having different electron affinities and/or ionization potentials, said method comprising the step of thermally annealing said photoresponsive device.
Dependencies are inferred from the claim text.