Organic Light‐Emitting Diodes Based on Imidazole Semiconductors

Organic light‐emitting diodes (OLEDs) are the most successful product of organic electronics in the market and continually receive attention from scientific and industrial communities. Imidazoles have been extensively investigated for OLED applications, and demonstrated their versatility in molecular design for different functions. This review presents a summary of recent studies on imidazole (including imidazole derived moieties) derivatives, with special focus on discussing various molecular design tactics, for applications as electron‐transporting materials, emitters, and host materials in OLEDs. At last, perspectives and challenges regarding to imidazole semiconductors for electroluminescence applications are also discussed. Imidazole semiconductors as components with various functions in organic light‐emitting diodes (OLEDs) are reviewed. The development of imidazole‐based materials as electron transporting materials, emitters, and host materials for phosphorescent OLEDs is discussed, with special attention on their molecular design tactics and relationships among structures, physical properties, and performances.