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AssigneeU.S. Philips Corporation
InventorsJonathan J. M. Halls, Richard H. Friend
Estimating the term…
First and second electrodes (3 and 4) are provided on respective ones (2' and 2") of the first and second major surfaces of a photoresponsive zone (2). The photoresponsive zone (2) is in the form of a polymer blend having regions (2a) of a first semiconductive polymer and regions (2b) of a second semiconductive polymer phase-separated from the first semiconductive polymer. The second semiconductive polymer has an electron affinity greater than that of the first semiconductive polymer so that, in use of the device (1), a photocurrent between the first and second electrodes (3 and 4) resulting from light incident on the photoresponsive layer comprises electrons travelling predominantly through the second semiconductive polymer and holes travelling predominantly through the first semiconductive polymer.
A photoresponsive device comprising a photoresponsive zone having first and second major surfaces and first and second electrodes provided on respective ones of the first and second major surfaces of the photoresponsive zone, the photoresponsive zone comprising a polymer blend having regions of a first semiconductive polymer and regions of a second semiconductive polymer phase-separated from the first semiconductive polymer, the second semiconductive polymer having an electron affinity greater than that of the first semiconductive polymer so that, in use of the device, a photocurrent between the first and second electrodes resulting from light incident on the photoresponsive zone comprises electrons travelling predominantly through the second semiconductive polymer and holes travelling predominantly through the first semiconductive polymer.
A photoresponsive semiconductor comprising a polymer blend having regions of a first semiconductive polymer and regions of a second semiconductive polymer phase-separated from the first semiconductive polymer and having an electron affinity greater than that of the first semiconductive polymer, so facilitating charge separation between the first and second semiconductive polymers.
A photoresponsive semiconductor comprising a phase-separated polymer blend having regions of a first semiconductive polymer comprising poly(p-phenylene vinylene), (PPV), having at least one substituent selected from the group consisting of alkyl, alkoxy, halogen and nitro components and regions of a second semiconductive polymer comprising a cyano-substituted copolymer of PPV having an electron affinity greater than that of the first semiconductive polymer, so facilitating charge separation between the first and second semiconductive polymers.
Dependencies are inferred from the claim text.