A light-emitting electrochemical cell (LEC or LEEC) is a solid-state device that generates light from an electric current (electroluminescence).
LECs are usually composed of two metal electrodes connected by (e.g. sandwiching) an organic semiconductor containing mobile ions.
iTMC devices are often more efficient than their LEP based counterparts due to the emission mechanism being phosphorescent rather than fluorescent.
Dispersing an ionic transition metal complex into an elastomeric matrix enables the fabrication of intrinsically stretchable light-emitting devices that possess large emission areas (~175 mm2) and tolerate linear strains up to 27% and repetitive cycles of 15% strain.
[9] In 2012 fabrication of organic light-emitting electrochemical cells (LECs) using a roll-to-roll compatible process under ambient conditions was reported.