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led,led physics,led chemistry

LED Physics and LED Science Explained Briefly by Article

As per LED Chemistry, Silicon Germanium bandgap semiconductor materials are not suitable for LED because the very higher percentage of electrical energy is to be converted into thermal energy hence emission of light is negligible.In silicon germanium semiconductor diodes electrons and holes recombined non-radiative radiation.Since

extrinsic semiconductor

Extrinsic Semiconductor Conductivity with Temperature

Conduction of current in the intrinsic semiconductor is poor at normal room temperature, the extrinsic semiconductor can do so.Then, the n-type semiconductor is not useful and inapplicable for electronics device apps technology.Then, very much required to add a small amount of impurity to the intrinsic