Organic photodetector with reduced dark current
AssigneeCambridge Display Technology Limited
InventorsGianluca Bovo, Nir Yaacobi-Gross
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Abstract
An organic photodetector comprising a first electrode, a second electrode, and a photosensitive organic layer between the electrodes, the photosensitive organic layer comprising a donor polymer and an acceptor compound, characterized in that the acceptor compound has a LUMO level shallower than that of the fullerene derivative PCBM.
Claims13
An organic photodetector comprising a first electrode, a second electrode, and a photosensitive organic layer between the electrodes, the photosensitive organic layer comprising a donor p-type organic semiconductor compound and an acceptor compound, characterized in that the acceptor compound has a LUMO level shallower than the LUMO level of the fullerene derivative PCBM:
- and wherein the donor p-type organic semiconductor compound is a conjugated organic polymer having a bandgap between 2.5 eV and 1.5 eV.
A method for reducing the dark current in a photosensitive active layer of an organic photodetector, comprising a donor p-type conjugated organic polymer having a bandgap between 2.5 eV and 1.5 eV, the method comprising use of an acceptor compound having a shallower LUMO level than the LUMO level of PCBM.
Dependencies are inferred from the claim text.