writer：tang rp, et al
keywords：PPV
source：期刊
specific source：Journal of Applied Polymer Science
Issue time：2005年
Two novel phenyl-substituted poly(p-phenylene vinylene) derivatives, poly{2-[3
,4
-(2-ethylhexyloxy)(3,7-dimethyloctyloxy)benzene]-1,4-phenylenevinylene} (EDP-PPV)
and poly{2-[3
,4
-(2-ethylhexyloxy)(3,7-dimethyloctyloxy)benzene]-5-methoxy-1,4-phenylenevinylene} (EDMP-PPV), and their copolymer, poly{2-[3
,4
-(2-ethylhexyloxy)(3,7-dimethyloctyloxy) benzene]-1,4-phenylene-vinylene-co-2-[3
,4
-(2-ethylhexyloxy)(
3,7-dimethyloctyloxy)benzene]-5-methoxy-1,4-phenylenevinylene}(EDP-co-EDMP-PPV; 4:1, 1:1, and 1:4), were successfully synthesized according to the Gilch route. The structures and properties of the monomers and the resulting conjugated polymers
were characterized with 1H-NMR, 13C-NMR, elemental analysis, gel permeation chromatography, thermogravimetric analysis, ultraviolet–visible absorption spectroscopy, and photoluminescence and electroluminescence (EL) spectroscopy. The EL polymers possessed excellent solubility in common solvents and good thermal stability with a 5% weight loss temperature of more than 380°C. The weight-average molecular
weights and polydispersity indices of EDP-PPV, EDMPPPV, and EDP-co-EDMP-PPV were 1.40–2.58  105, and 1.19–1.52, respectively. Double-layer light-emitting diodes with the configuration of indium tin oxide/polymer/tris(8-hydroxyquinoline) aluminum/Al devices were fabricated, and EDP-co-EDMP-PPV (1:1) showed the highest EL performance and exhibited a maximum luminance of 1050 cd/m2 at 19.5 V.