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Chapter 12: Problem 72

For each of the following pairs of semiconductors, which one will have the larger band gap: (a) InP or InAs, \((\mathbf{b})\) Ge or AlP, (c) Agl or CdTe?

Short Answer

Expert verified
In conclusion, for each pair of semiconductors, the following has a larger band gap: (a) InP with a band gap of \(1.34 eV\), (b) AlP with a band gap of \(2.45 eV\), and (c) Agl with a band gap of \(3.2 eV\).

Step by step solution

01

a) InP or InAs

To compare the band gaps of InP and InAs, we need to first find the values of their band gaps. You can either look up values from a reference book or search online. We get the following values: Band gap of InP: \(1.34 eV\) Band gap of InAs: \(0.36 eV\) Now comparing the values, we find that InP has a larger band gap (1.34 eV) than InAs (0.36 eV).
02

b) Ge or AlP

Similarly, for the pair Ge and AlP, we need to find the values of their band gaps. We get the following values: Band gap of Ge: \(0.66 eV\) Band gap of AlP: \(2.45 eV\) Comparing the values, we find that AlP has a larger band gap (2.45 eV) than Ge (0.66 eV).
03

c) Agl or CdTe

Finally, for the pair Agl and CdTe, we need to find the values of their band gaps: Band gap of Agl: \(3.2 eV\) Band gap of CdTe: \(1.5 eV\) Comparing the values, we find that Agl has a larger band gap (3.2 eV) than CdTe (1.5 eV). In conclusion, InP has a larger band gap than InAs, AlP has a larger band gap than Ge, and Agl has a larger band gap than CdTe.

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