Abstract
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 / Alq 3/ 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 / Alq 3/ Mg : Ag in CIE (Commission Internationale de l'Eclairage) chromaticity coordinates.
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