Light-emitting electrochemical cells based on poly(2-methoxy-5-triethoxy-1,4-phenylene vinylene)
A luminescent polymer with a PEO-like side chain, poly(2-methoxy-5-triethoxy-1,4-phenylene vinylene)(MTEO-PPV), was synthesized and characterized by UVVis spectra, photoluminescence (PL) spectra and cyclic voltammetry. The relatively high molecular weight (Mn=77,000) permitted the fabrication of good quality films. Its PL relative quantum yield can reach 38% in chloroform solution. Single layer light-emitting electrochemical cell (LEC) devices were fabricated using MTEO-PPV and lithium triflate as the emissive layer, ITO and Al as the electrodes. The devices were turned on at about 2.8V, while that without lithium triflate was turned on at about 9V, and the brightness increased significantly in contrast to the latter.
light-emitting electrochemical cell luminescence mteo-ppv