New Host Material for High-Performance Blue Phosphorescent Organic Electroluminescent Devices

摘要

In recent years, a considerable amount of attention has been paid toward the development of organic emissive materials for potential applications in full-color flat-panel displays and lighting sources. A number of red and green light-emitting materials have already been identified for use in phosphorescent organic light-emitting diodes (PhOLEDs). PhOLEDs based on these materials are characterized by high luminous efficiency, reasonable color purity, and long lifetimes. However, the development of blue phosphorescent OLEDs with high electroluminescence (EL) efficiency remains a challenge because a high bandgap energy and high triplet energy are required for blue emitters.