Light-Emitting Eiectrochemical Cells with Millimeter-Sized Interelectrode Gap:Low-Voltage Operation at Room Temperature

摘要

pi-Conjugated polymers (CPs) frequently offer the opportunity of electrochemical doping to attain a high (and controllable) electronic conductivity.The polymer light-emitting electrochemical cell (LEC) is a device that exploits this property in an interesting and attractive manner,since it contains a CP that is simultaneously p-type doped at the anode and n-type doped at the cathode during the initial electrochemical operation.After a turn-on time,during which the p-type and n-type doped regions grow toward each other,a highly efficient light-emitting p-n junction is formed in the active material of the LEC.