I am concerned about the energies of EM radiations. Like the visible has an energy in the range of 1eV, UV has an energy of 10 eV. So when we shine the EM on a semiconductor, how does it affect the charge carrier concentration of it.
If the semiconductor absorbs the UV radiation, it is generally going to promote carriers into the conduction band, thus changing the materials's permittivity. It can be simply modeled by a Drude-like term, where the free carriers concentration is due to light absorption.
Hello Mr SK Pilai: "
An increase in the temperature leads to an increase in the number of charge carriers in semiconductors as well as to increase in the number of phonons and current resistance in metals. Therefore, the electron-phonon interaction has a significant effect on the electron transport phenomena in these materials." Article Surface electromagnetic waves at the interface between dissi...
Article Surface electromagnetic waves at the interface between dissi...
I hope the above input helps. Regards--
It depends on the thermal part of incident energy, which in turn rising the charge carriers from valence to conduction band
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