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OLEDs containing thermally stable glassy organic hole transporting materials

  • US 6,150,043 A
  • Filed: 04/10/1998
  • Issued: 11/21/2000
  • 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 electroluminescence, wherein the heterostructure comprises a hole transporting layer having a glass structure, and wherein the hole transporting layer comprises a compound having the formula:

  • ##STR15## wherein A consists of one or two phenyl groups and R1 and R2 are, independently of one another, selected from the group consisting of hydrogen, an alkyl group, a phenyl group, a substituted alkyl group and a substituted phenyl group, and wherein R1 and R2 may be bridged.

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