Patents Assigned to Cambridge Capital Management Limited
  • Patent number: 5247190
    Abstract: An electroluminescent device comprises a semiconductor layer (4) in the form of a thin dense polymer film comprising at least one conjugated polymer, a first contact layer (5) in contact with a first surface of the semiconductor layer, and a second contact layer (3) in contact with a second surface of the semiconductor layer. The polymer firm (4) of the semiconductor layer has a sufficiently low concentration of extrinsic charge carriers that on applying an electric field between the first and second contact layers across the semiconductor layer so as to render the second contact layer positive relative to the first contact layer charge carriers are injected into the semiconductor layer and radiation is emitted from the semiconductor layer.
    Type: Grant
    Filed: December 28, 1990
    Date of Patent: September 21, 1993
    Assignees: Cambridge Research and Innovation Limited, Cambridge Capital Management Limited, Lynxvale Limited
    Inventors: Richard H. Friend, Jeremy H. Burroughes, Donal D. Bradley