| abstract |
The organic EL device of the present invention fulfills the object of realizing an organic EL device which exhibits an excellent hole injecting efficiency and an improved light emitting efficiency and which can be operated at a low drive voltage and manufactured at a reduced cost. In order to attain such object, the organic EL device comprises a hole injecting electrode, a negative electrode, and one or more organic layers between the electrodes wherein at least one of said organic layers has a light emitting function. A high resistivity inorganic hole injecting layer is provided between said hole injecting electrode and the organic layer. This layer has conduction paths for electron blockage and hole transportation. An inorganic insulative electron injecting and transporting layer is provided between the light emitting layer and the negative electrode. This layer contains at least one oxide selected from strontium oxide, magnesium oxide, calcium oxide, lithium oxide, rubidium oxide, potassium oxide, sodium oxide and cesium oxide as its main component. |