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Blue emitting internal junction organic electroluminescent device (I)

  • US 5,151,629 A
  • Filed: 08/01/1991
  • Issued: 09/29/1992
  • Est. Priority Date: 08/01/1991
  • Status: Expired due to Term
First Claim
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1. An internal junction organic electroluminescent device comprised of, in sequence, an anode, an organic hole injecting and transporting zone, an organic electron injecting and transporting zone, and a cathode,characterized in that said organic electron injecting and transporting zone is comprised ofan electron injecting layer in contact with the cathode and,interposed between the electron injecting layer and the organic hole injecting and transporting zone, a blue emitting luminescent layer comprised of a charge accepting compound of the formula:

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    space="preserve" listing-type="equation">(R.sup.s --Q).sub.2 --Al--O--Al--(Q--R.sup.s).sub.2 whereQ in each occurrence represents a substituted 8-quinolinolato ring nucleus andRs represents an 8-quinolinolato ring substituent chosen to block sterically the attachment of more than two substituted 8-quinolinolato ring nuclei to any one aluminum atom.

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