11.2: Efficient Deep Blue Triplet Emitters for OLEDs

Abstract

Cyclometallated iridium carbene complexes are introduced as efficient blue triplet emitters. Quantum mechanical calculations have been used to design and to optimize this class of materials predominantely with respect to color coordinates and luminescence quantum yield. To complete the set of materials required for deep blue OLED devices we engineered suitable host and blocker materials for the use in combination with large triplet energy carbene emitters. These tailor-made materials were applied to develop deep blue electroluminescent devices with excellent efficiency.