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InterviewSolution
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Define Mobility Of A Carrier. Show That The Mobility Constant Of Electron Is Larger Than That Of A Hole? |
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Answer» Mobility is defined as the average particle drift velocity PER unit electric field. The mobility of electrons is more than that of HOLES because the PROBABILITY of an electron having the energy required to move to an empty state n the CONDUCTION BAND is much greater than the probability of an electron having the energy required to move to the empty state in valence band. The mobility of electron is about double that of a hole. Mobility is defined as the average particle drift velocity per unit electric field. The mobility of electrons is more than that of holes because the probability of an electron having the energy required to move to an empty state n the conduction band is much greater than the probability of an electron having the energy required to move to the empty state in valence band. The mobility of electron is about double that of a hole. |
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