As soon as light is produced by the use of electricity without producing heat (light bulb), the phenomenon is called electroluminescent (EL). Lumoza’s activity focuses around EL that can be printed, or cast from solution, i.e. phosphor based EL or PLED (polymer based organic LED). Since PLED’s are still in R&D phase, the only commercial product is phosphor based EL. Also called LEC (Light Emitting Capacitor). The working principle is as follows: On a flexible or rigid substrate, multiple layers are printed. They consist out: A transparent conductor, the active phosphor layer seperated from the back electrode with a dielectric layer. If we now apply a voltage over the 2 electrodes, as magic, light will find it’s way out of the transparent electrode!