An n-type semiconductor with direct band structure (Eg = 2.5 eV) is applied with a DC voltage shown below. (i) Schematically draw the band diagram for this semiconductor under this DC voltage. (ii) Calculate the longest wavelength in light absorption from this n-type semiconductor with applied DC voltage.

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Types of Charge Carriers

A carrier is a type of object which carries a particular thing from one point to another point. For instance, people use different vehicles from one place to another, and the vehicle carries those people and acts as a carrier.