From Multi-Layer to Single-Layer Phosphorescent OLEDs with Excellent Performance enabled by Novel Matrix Materials

摘要

In the past, commercial OLED display applications have been restricted by the overall performance of these devices and their deficiencies with respect to lifetime, power efficiency and complex multi layer structure. Novel materials are the key to high performance phosphorescent devices. Those materials show significant advantages over the currently used class of carbazole based materials. A significantly simpler device structure can be fabricated using the new material classes. Compared to the classical triplet device structure (employing electron transport layers and holeblocking layers) an even better EL performance is observed. Even a single layer OLED reveals excellent performance.