Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 12: Problem 71

For each of the following pairs of semiconductors, which one will have the larger band gap: (a) CdS or CdTe, (b) GaN or InP, (c) GaAs or InAs?

Short Answer

Expert verified
For each pair of semiconductors, the one with the larger band gap is: (a) CdS, with a band gap of 2.42 eV, (b) GaN, with a band gap of 3.4 eV, and (c) GaAs, with a band gap of 1.43 eV.

Step by step solution

01

Find the Band Gaps

Look up the band gap values for each of the given semiconductors in a reference book or reliable online source. (a) CdS: The band gap is 2.42 eV. CdTe: The band gap is 1.44 eV. (b) GaN: The band gap is 3.4 eV. InP: The band gap is 1.35 eV. (c) GaAs: The band gap is 1.43 eV. InAs: The band gap is 0.36 eV.
02

Compare the Band Gaps

Compare the band gaps of each pair to determine which semiconductor has a larger band gap. (a) CdS vs CdTe: CdS has a band gap of 2.42 eV, while CdTe has a band gap of 1.44 eV. Since 2.42 eV > 1.44 eV, CdS has a larger band gap. (b) GaN vs InP: GaN has a band gap of 3.4 eV, while InP has a band gap of 1.35 eV. Since 3.4 eV > 1.35 eV, GaN has a larger band gap. (c) GaAs vs InAs: GaAs has a band gap of 1.43 eV, while InAs has a band gap of 0.36 eV. Since 1.43 eV > 0.36 eV, GaAs has a larger band gap.
03

Write the Results

After comparing the band gaps, note down which semiconductor has a larger band gap for each pair. (a) In the pair of CdS and CdTe, the semiconductor with the larger band gap is CdS. (b) In the pair of GaN and InP, the semiconductor with the larger band gap is GaN. (c) In the pair of GaAs and InAs, the semiconductor with the larger band gap is GaAs.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Potassium metal (atomic weight \(39.10 \mathrm{~g} / \mathrm{mol}\) ) adopts a body-centered cubic structure with a density of $0.856 \mathrm{~g} / \mathrm{cm}^{3}\(. (a) Use this information and Avogadro's number \)(6.022 \times\( \)10^{23}$ ) to estimate the atomic radius of potassium. (b) If potassium didn't react so vigorously, it could float on water. Use the answer from part (a) to estimate the density of \(\mathrm{K}\) if its structure were that of a cubic close-packed metal. Would it still float on water?

One method to synthesize ionic solids is by the heating of two reactants at high temperatures. Consider the reaction of \(\mathrm{MgO}\) with \(\mathrm{TiO}_{2}\) to form \(\mathrm{MgTiO}_{3}\). Determine the amount of each of the two reactants to prepare \(3.250 \mathrm{~g} \mathrm{MgTiO}_{3}\), assuming the reaction goes to completion. (a) Write a balanced chemical reaction. (b) Calculate the formula weight of \(\mathrm{MgTiO}_{3}\). (c) Determine the moles of \(\mathrm{MgTiO}_{3}\). (d) Determine moles and mass (g) of MgO required. (e) Determine moles and mass (g) of \(\mathrm{TiO}_{2}\) required.

What evidence supports the notion that buckyballs are actual molecules and not extended materials? (a) Buckyballs are made of carbon. (b) Buckyballs have a well-defined atomic structure and molecular weight. (c) Buckyballs have a well-defined melting point. (d) Buckyballs are semiconductors. (e) More than one of the previous choices.

Sodium oxide \(\left(\mathrm{Na}_{2} \mathrm{O}\right)\) adopts a cubic structure with \(\mathrm{Na}\) atoms represented by green spheres and \(\mathrm{O}\) atoms by red spheres. (a) How many atoms of each type are there in the unit cell? (b) Determine the coordination number and describe the shape of the coordination environment for the sodium ion. (c) The unit cell edge length is \(555 \mathrm{pm}\). Determine the density of \(\mathrm{Na}_{2} \mathrm{O}\)

What molecular structural features cause high-density polyethylene to be denser than low-density polyethylene?
See all solutions

Recommended explanations on Chemistry Textbooks

Physical Chemistry

Read Explanation

Nuclear Chemistry

Read Explanation

Organic Chemistry

Read Explanation

Making Measurements

Read Explanation

Chemistry Branches

Read Explanation

Chemical Reactions

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free