Light‐Emitting Electrochemical Cells with Crown Ether as Solid Electrolyte

Light‐emitting electrochemical cells (LECs) are reported with lithium salt/crown ether complex as the solid electrolyte. By careful choice of the combination of electroluminescent polymer, crown ether, and lithium salt, LECs are demonstrated with good quantum efficiency, fast response, and long stress life. The results demonstrate the importance of phase compatibility to LEC performance.