Three stack hybrid white OLED for enhanced efficiency and lifetime

US9577221B2 · kind B2 · utility

Assignee

• UNIVERSAL DISPLAY CORPORATION · US

Inventors

• Michael S. Weaver · Princeton, US
• Julia J. Brown · Yardley, US

Key dates

• Filing date: Aug 12, 2013
• Grant date: Feb 21, 2017
• Expiry date: Aug 12, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2101/27

Abstract

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.