×

Organic electroluminescent elements

  • US 5,601,903 A
  • Filed: 08/25/1994
  • Issued: 02/11/1997
  • Est. Priority Date: 08/27/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. An organic EL element comprising a pair of a hole injecting electrode and an electron injecting electrode sandwiching an organic luminous layer and an organic carrier transport layer placed one on top of the other to have a boundary between the organic luminous layer and the organic carrier transport layer, whereinone of the organic luminous layer and the organic carrier transport layer, whichever is placed closer to the hole injecting electrode, is doped with a first organic material, the first organic material being made of at least one substance, a minimum level of a conducting band of the first organic material being lower than a minimum level of a conducting band of the layer which is doped with the first organic material.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×