Patent ID: 6166488
Filing Date: 2000-12-26
Classification: H01L

Abstract:
An organic EL device comprising a substrate, a hole injecting electrode and a cathode formed on said substrate, and an organic substance-containing light emitting layer located at least between said electrodes, wherein:an inorganic insulating electron injecting and transporting layer is located between said light emitting layer and said cathode,an inorganic insulating hole injecting and transporting layer is located between said light emitting layer and said hole injecting electrode,said inorganic insulating electron injecting and transporting layer comprises as a main component one or two or more oxides selected from the group consisting of strontium oxide, magnesium oxide, calcium oxide, lithium oxide, rubidium oxide, potassium oxide, sodium oxide and cesium oxide,said inorganic insulating hole injecting and transporting layer comprises as a main component an oxide of silicon and/or an oxide of germanium, said main component having an average composition represented by(Si.sub.1-x Ge.sub.x)O.sub.ywhere 0.ltoreq.x.ltoreq.1, and 1.7.ltoreq.y.ltoreq.1.99,said light emitting layer comprises a layer made up of a host substance on a side thereof contiguous to said inorganic insulating electron injecting and transporting layer and/or said inorganic insulating hole injecting and transporting layer, andat least a part of said layer made up of said host substance comprises a layer containing a dopant in addition to said host substance.