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Mixed vapor deposited films for electroluminescent devices

  • US 6,358,631 B1
  • Filed: 08/06/1996
  • Issued: 03/19/2002
  • Est. Priority Date: 12/13/1994
  • Status: Expired due to Term
First Claim
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1. A multicolor light emitting device (LED) structure, comprising:

  • a plurality of at least a first and a second light emitting organic device (LED) stacked one upon the other, to form a layered structure, with each LED separated one from the other by a transparent conductive layer to enable each device to receive a separate bias potential to emit light through the stack, at least one of said LED'"'"'s comprising an emission layer, said emission layer comprising at least one of a) a trivalent metal complex having the formula;

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    wherein M is a trivalent metal ion;

    Q are the atoms necessary to make at least one fused ring, at least one of said fused rings containing at least one nitrogen atom;

    L is a ligand selected from the group consisting of picolylmethylketone;

    substituted and unsubstituted salicylaldehyde;

    a group of the formula R1(O)CO—

    wherein R1 is selected from the group consisting of hydrogen, an alkyl group, an aryl group, and a heterocyclic group, each of which may be substituted with at least one substituent selected from the group consisting aryl, halogen, cyano and alkoxy;

    halogen;

    a group of the formula R1O—

    wherein R1 is as defined above, bistriphenyl siloxides and quinolates and derivatives thereof;

    p is 1 or 2 and t is 1 or 2 wherein p does not equal t; and

    b) a trivalent metal bridged complex having the formula;

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    wherein M and Q are defined as above.

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