Patent ID: 6340537
Filing Date: 2002-01-22
Classification: H01L

Abstract:
An organic electroluminescent device comprising a hole injecting electrode, a negative electrode, and at least one organic layer between the electrodes; whereinat least one of said at least one organic layer has a light emitting function; a high resistivity inorganic hole injecting layer is provided between said hole injecting electrode and said organic layer, said high resistivity inorganic hole injecting layer having conductive paths for electron blockage and hole transportation; and an inorganic insulative electron injecting and transporting layer is provided between said organic layer and said negative electrode, said inorganic insulative electron injecting and transporting layer containing 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, wherein said high resistivity inorganic hole injecting layer has a resistivity of 1 to 1Ã—1011 &OHgr;Â·cm.