3. In a sample of InGaAs, the effective electron mass is 3.7 x 10-32 kg and that ofholes is 1.8 x 10-31 kg. Estimate the density of carriers in the conduction andvalence bands and the total carrier density. Take Eg to be 0.75 eV.[2.05 x 1023 m-3, 2.20 x 1024 m-3 and 3.41 x 1017 m-3]4. The InGaAs sample of question 3 is used in a p + n diode in which the p-type isdoped to 1027 and the n-type to 1025 m-3. Determine the barrier potential.[0.975 V]

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Chapter1: Atomic Structure

Section: Chapter Questions

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Concept explainers

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.

Question

3. In a sample of InGaAs, the effective electron mass is 3.7 x 10-32 kg and that of
holes is 1.8 x 10-31 kg. Estimate the density of carriers in the conduction and
valence bands and the total carrier density. Take Eg to be 0.75 eV.
[2.05 x 1023 m-3, 2.20 x 1024 m-3 and 3.41 x 1017 m-3]
4. The InGaAs sample of question 3 is used in a p + n diode in which the p-type is
doped to 1027 and the n-type to 1025 m-3. Determine the barrier potential.
[0.975 V]

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