US Patent 7687990 OLED device with short reduction

In an OLED device having a substrate, a first electrode layer disposed over the substrate, an inorganic short reduction layer disposed over the first electrode layer, an organic electroluminescent medium disposed over the short reduction layer, and a second electrode layer over the electroluminescent medium, a feature is the inclusion of a mixture of ZnS, SiO2, and ITO in the short reduction layer wherein the ratio of In atoms to Zn atoms is in the range of from 0.90 to 2.37.