New carbazole derivatives including coumarin moiety, 7-(3-Carbazol-yl-phenyl-chromen-2-one (C-PCa), 7-(9-Phenyl-9H-carbazol-3-y1)chromen-2-one (PCa-C), 7-[9-(3-Carbazol-9-yl-pheny1)-9H-carbazol-3 -y1]-chromeri-2-one (PDCa-C) were synthesized by Suzuki reaction. A non-doped OLED was fabricated using the synthesized material as emitting materials. Among the three synthesized compounds, PDCa-C showed the highest efficiency with current efficiency of 1.34 cd/A and C.I.E of (0.18, 023) in the current density 10 mA/cm(2).