What are Light-Emitting Polymers (LEP)?
Light-Emitting Polymer (LEP) materials were initially discovered by Jeremy Burroughes, Donal Bradley and Richard Friend at the Cavendish Laboratory in the University of Cambridge in the late 1980’s. Most often based on polyphenylene vinylene (PPV) and polyfluorene (PF) chemistries, these novel plastics are long-chain organic semi-conducting molecules that can transport charge and emit light under DC drive. In terms of processibility, LEP materials are liquid soluble and convertible into ink-like materials. This opens the door to their coating and deposition using a variety of low-cost, high-speed printing methods. The emission from LEP materials can span the visible and near IR spectrum including Red, Blue, Green, Yellow and White. The two leading suppliers of raw LEP polymers are Merck OLED and Sumation. Add-Vision is focused not on synthesizing LEP materials, but rather in converting these materials into specially-formulated inks for printed P-OLED. That is, Add-Vision develops propr
