Feb 5, 2010

Light Emitting Polymer

Light Emitting Polymer is a polymer which emits light when subjected to voltage. The structure comprises of a thin film of semiconducting polymer sandwiched between two electrodes (cathode and anode). When electrons and holes are injected from the electrodes, the recombination of these charge carriers takes place, which leads to emission of light. The band gap, ie. The energy difference between valence band and conduction band determines the wavelength (color) of the emitted light.


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