An electroluminescent polymer was synthesized by Wittig condensation and characterized by the measurements of H-1-NMR, IR, gel permeation chromatography (GPC), UV-Vis, PL, and cyclic voltammetry (CV). The polymer can be dissolved in common organic solvents such as tetrahydrofuran (THF), chloroform, and dichloromethane. The electroluminescent investigation showed that the non-doped devices with a double-layer configuration (ITO/PEDOT:PSS/Polymer/Mg:Ag) have a stable green emission property. The maximum luminance of the annealed device reaches 2317 cd/m(2). The emission maximum and the CIE 1931 coordinate values are respectively stabilized at 552 nm and near (x, y) =(0.43, 0.55) with different voltages. Copyright (C) 2008 John Wiley & Sons, Ltd.

Two phenothiazine-based polymers were synthesized by the Heck reaction of 3,7-divinyl-N-octylphenothiazine with 3,7-diiodo-N-octyl-phenothiazine and 5,8-dibromo-2,3-diethylquinoxaline. The polymers were characterized by the measurements of (1)H-NMR, IR, TG, GPC, CV, UV–Vis, and FL. The results indicated that the introduction of quinoxaline group makes the absorption, PL, and EL emission maxima red-shifted. The EL emission maximum and the CIE 1931 coordinate value are stabilized at a constant value with the increase in operating voltages. Therefore, the polymers have a stable electroluminescent emission property. Copyright (c) 2008 John Wiley & Sons, Ltd.