Molecular Crystals and Liquid Crystals, Vol.651, No.1, 48-54, 2017
Synthesis and electroluminescent properties of new coumarin derivatives
4-methyl-7-(10-(pyren-1-yl)anthracen-9-yl)-2H-chromen-2-one (PAC), 7,7'-(anthracene-9,10-diyl)bis(4- methyl-2H-chromen-2-one) (CAC), 7-Ant-hracen-9-yl-4-methyl-chromen-2-one (AC), and 7-(naphthalen-1-yl)-2H-chromen-2-one (NC) were synthesized through Suzuki aryl-aryl coupling reaction. Optical and electroluminescence (EL) properties were evaluated by UV-visible absorption, photoluminescence (PL) spectra, and EL devices. Synthesized compounds were used as an emitting layer (EML) in non-doped device with the following structures: ITO/2-TNATA (60nm)/NPB (15nm)/synthesized compounds (35nm)/Alq(3) (20nm)/LiF (1nm)/Al (200nm). Non-doped devices showed luminance efficiency (L.E.) of 1.38, 1.03, 1.12, and 0.39cd/A at a current density of 10mA/cm(2).