Light-Emitting Polymers

SEMINAR ON LIGHT EMITTING POLYMERS : polymers can emit light when a voltage is employed to it. The design consists of a thin film of semiconducting polymer sandwiched between cathode and anode(electrodes).When electrons and holes are injected from the electrodes, the recombination of these charge carriers arises, which causes emission of light .The band gap, ie. The energy variance between valence band and conduction band decides the wavelength(color's) of the emitted light.They are usually produced by ink jet printing process. In this strategy red,green and blue polymer remedies are jetted into well defined areas on the substrate. Simply because, PLED's are solvable in common organic solvents like toluene and xylene .The film thickness uniformity is attained by multi-passing (slow) is by heads with drive per nozzle technology .The pixels are handled by using active or passive matrix. The benefits include low cost, small size, no viewing angle limitations, low power need, biodegradability etc. They are set to change LCD's used in laptops and CRTs(used in desktop computers today). Their upcoming programs include flexible displays which can be folded, wearable displays with interactive features, camouflage etc.