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Star-configured carbazole as an efficient near-ultraviolet emitter and hole-transporting material for organic light-emitting devices
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A novel organic material, 9-methyl-1,3,6,8-tetraphenyl-carbazole (MTPC-Me), for use in organic electroluminescent devices has been developed. This star-configured carbazole gives a strong near-ultraviolet (n-UV) emission with a high emission quantum efficiency of 47% and a narrow full width half maximum of . Two types of high-performance organic light-emitting devices were obtained using MTPC-Me as a n-UV emitter and hole-transporting material with maximum external quantum efficiency,brightness, and turn-on voltage of 1.2%, , and for the former and 1.1%, , and for the latter, respectively.
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