THREE STACK HYBRID WHITE OLED FOR ENHANCED EFFICIENCY AND LIFETIME

摘要

OLEDs containing a stacked hybrid architecture including a phosphorescent organic emissive unit and two fluorescent organic emissive units are disclosed. The stacked hybrid architecture includes a plurality of electrodes and a hybrid emissive stacked disposed between at least two of the electrodes. The stack contains at least three emissive units and at least two charge generation layers. At least one of the three emissive units is a phosphorescent organic emissive unit and at least two of the three emissive units are fluorescent organic emissive units. More specifically, the two fluorescent organic emissive units may be blue organic emissive units that emit light from the same or different color regions.

主权项

1. A device comprising: a first electrode;
a second electrode; and a hybrid emissive stack disposed between the first electrode and the second electrode, the stack comprising at least three emissive units and at least two charge generation layers, wherein: a first emissive unit of the at least three emissive units is disposed over the first electrode; a first charge generation layer of the at least two charge generation layers is disposed over the first emissive unit; a second emissive unit of the at least three emissive units is disposed over the first charge generation layer; a second charge generation layer of the at least two charge generation layers is disposed over the second emissive unit; and a third emissive unit of the at least three emissive units is disposed over the second charge generation layer, wherein the second emissive unit is a phosphorescent organic emissive unit, and wherein the first emissive unit and the third emissive unit are fluorescent organic emissive units.