SUBSTANCES AND STRUCTURES FOR EFFICIENTLY HARVESTING SINGLET AND TRIPLET EXCITONS FOR WHITE OLED

摘要

PROBLEM TO BE SOLVED: To provide an improved device structure to achieve an improved balance of efficiency and lifetime in a white OLED.SOLUTION: The present invention relates to organic light emitting devices (OLEDs), and more specifically to OLEDs that emit light using a combination of fluorescent emitters and phosphorescent emitters for efficient utilization of all of the electrically generated excitons.