Organic electroluminescent cell
Organic electroluminescent devices having improved power conversion efficiencies
Electroluminescent device with organic luminescent medium
Vacuum column web loop position sensing system Patent #: 4762292
ApplicationNo. 760190 filed on 09/16/1991
US Classes:428/690, Fluroescent, phosphorescent, or luminescent layer313/498, Solid-state type313/503, With particular phosphor or electrode material313/504, Organic phosphor313/506, Plural layers313/507, With photosensitive layer428/691, Halogen-containing428/917ELECTROLUMINESCENT
ExaminersPrimary: Robinson, Ellis P.
Assistant: Nold, Charles
Attorney, Agent or Firm
Foreign Patent References
International ClassH05B 033/14
AbstractDisclosed is an electroluminescent element comprising an anode, a cathode and, disposed therebetween, an organic luminescent layer comprising a mixture of a fluorescent luminescent agent, at least one hole moving and donating agent capable of moving holes and donating the same to the luminescent agent and at least one electron moving and donating agent capable of moving electrons and donating the same to the luminescent agent. In the element, the components of the luminescent layer have specific oxidation potential and reduction potential relationships. The element emits light in response to electrical signals. The element exhibits high luminescence efficiency and brightness even at low voltages, and it can efficiently be produced at low cost.