Synthesis of an electroluminescent polymer and its non-doped light-emitting diodes with stable green emission

摘要

An electroluminescent polymer was synthesized by Wittig condensation and characterized by the measurements of 1{sup left}H-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{sup}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.