Tetrasubstituted-pyrene derivatives for electroluminescent application

Abstract Tetrasubstituted-pyrenes containing peripheral diarylamines ( 1 – 4 ) or fluorenes ( 5 – 6 ) have been synthesized. These compounds are highly fluorescent and possess high morphological stability and thermal stability. Compounds containing peripheral arylamines ( 1 – 3 ) can be used as the hole-transport and green-emitting materials for two-layered electroluminescent devices. Compounds with peripheral fluorenes ( 5 – 6 ) are efficient blue emitters and exhibit ambipolar carrier-transport characteristics with high electron mobilities (10 −3 –10 −2  cm 2 /V s) and high hole mobilities (>10 −3  cm 2 /V s). Non-doped blue-emitting devices with promising electroluminescent performance (i.e., high efficiency and narrow/saturated emission) can be achieved using fluorene–substituted pyrenes as either the hole-transport/emitting layer or the electron-transport/emitting layer in the two-layered devices.