New blue emitting materials based on triple-core chromophores for organic light-emitting diodes

Abstract

ABSTRACTA novel dual core system was recently developed for producing highly efficient organic emitters. Triple-core chromophores were prepared by extending a dual core chromophore. 1,6-Di-anthracen-9-yl-pyrene (1,6 DAP core), 6,12-di-anthracen-9-yl-chrysene (DAC core), and 2,7-di-anthracen-9-yl-pyrene (2,7 DAP core) were designed and synthesized. Its physical and electroluminescent properties were also investigated. Triple-core chromophores were used for the blue fluorescent emitters. A structure of the device was fabricated as ITO/2-TNATA (60 nm)/ NPB (15 nm)/synthesized materials (35 nm)/Alq3 (20 nm)/LiF (1 nm)/Al (200 nm). The device performance of 1,6 DAP core, DAC core, and 2,7 DAP core at 10 mA/cm2 corresponded to luminance efficiencies of 4.97 cd/A, 3.95 cd/A, and 3.50 cd/A, respectively.