NOVEL BLUE ORGANIC LIGHT-EMITTING MATERIAL

The blue light-emitting material was synthesized. With the non-doped, blue-emitting material in the multilayer device structure, it was possible to achieve the luminous efficiency of 3.38 cd/A at 110 mA/cm². The EL spectrum of the ITO/CuPc/NPB/BDPSP/Alq₃/Mg:Ag device showed a narrow emission band with full width at half maximum (FWHM) 70 nm and λ_max=448.25 nm. The emitting color of the device showed the highly pure blue emission (x,y)=(0.158, 0.10) for ITO/CuPc/NPB/BDPSP/Alq₃/Mg:Ag in CIE (Commission Internationale de l'Eclairage) chromaticity coordinates.