화학공학소재연구정보센터
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.349, 507-510, 2000
Color tunable electroluminescence from polymer blends containing carbazole unit
The electro-optical properties of poly(phenylenevinylene-alt-N-hexyl-carbazolevinylene) [Poly(PPV-N-hexylCvz)], poly[1',4'-phenylene-1 ", 4 "-(2 "-(2''''-ethylhexyloxy))phenylene-2,5-(1''',4'''-phenylene)-1,3,4-oxadiazolyl](PPEPPO) and their blends were characterized. The photoluminescence and electroluminescence spectra of the blend films composed of Poly(PPV-N-hexylCvz) and PPEPPO were mainly contributed from the luminance of Poly(PPV-N-hexylCvz) even at low Poly(PPV-N-hexylCvz) ratios. Remarkably enhanced EL efficiency was observed as the ratio of PPEPPO increased. As the ratio of PPEPPO was increased from 50 to 83 %, the EL emission was changed from green to blue color.