SEMINAR ON LIGHT EMITTING POLYMER : The seminar focuses on polymers that can emit light when a voltage is applied. The structure consists of a thin film of semiconducting polymer sandwiched between two electrodes (cathode and anode). When electrons and holes are injected by the electrodes, the recombination of charge carriers takes place, leading to light emission. Bandgap, ie. The energy difference between the valence band and conduction band determines the wavelength (color) of light emitted.
They are usually made of process-jet printing ink. In this method, polymer solutions red green and blue projected in defined areas on the substrate. That's because PLEDs are soluble in organic solvents such as toluene and xylene. The uniformity of the thickness of the film is directed by multi-pass (slower) are heads of disk and nozzle technology. Pixel is controlled by active or passive matrix. The advantages include low cost, small size, no viewing angle limitations, low power consumption, biodegradability, etc. They are ready to replace LCD screens used in laptops and CRTs used in computers office today. Future applications include flexible displays that can be folded, portable screens with interactive features, camouflage, etc.

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