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Color-tunable organic light emitting devices

  • US 6,312,836 B1
  • Filed: 12/09/1998
  • Issued: 11/06/2001
  • Est. Priority Date: 04/10/1998
  • Status: Expired due to Term
First Claim
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1. An organic light emitting device comprising a heterostructure for producing luminescence wherein said heterostructure includes an emissive layer comprising:

  • a host material;

    an emissive material present as a dopant in said host material; and

    a polarization material present as a dopant in said host material, wherein said polarization material contributes to the local dipole moment of said emissive layer and thereby affects the wavelength of light emitted by said emissive material and wherein said polarization material is not the same material as said emissive material;

    wherein said host material, said emissive material and polarization material are selected in combination so as to produce an emission peak in a prescribed spectral region when a voltage is applied across the heterostructure.

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