Conjugated polymer light-emitting electrochemical cell (LEC) is a new type of light -emitting devices
which is composed of a thin polymer film sandwiched between two electrodes. The film is a blend of luminescent polymer and solid electrolyte. Compared with polymer light-emitting diodes
LEC is of the advantages of good stability and low operating voltage-In this paper
the device configuration
operation mechanism of LEC and the recent progress in its study were described.