Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 12: Problem 73

If you want to dope GaAs to make an n-type semiconductor with an element to replace Ga, which element(s) would you pick?

Short Answer

Expert verified
To dope GaAs and make an n-type semiconductor by replacing Ga, suitable elements would be silicon (Si) and germanium (Ge) as they have 4 valence electrons and compatible lattice properties with GaAs.

Step by step solution

01

Determine the number of valence electrons in Ga

To determine a suitable dopant, we first need to know how many valence electrons Ga has. Gallium is in group 13 of the periodic table, so it has 3 valence electrons.
02

Identify elements with more valence electrons than Ga

We need to find elements that have one more valence electron than Ga to make an n-type semiconductor. Since Ga has 3 valence electrons, we are looking for elements with 4 valence electrons. Elements in group 14 of the periodic table have 4 valence electrons, such as C, Si, Ge, and Sn.
03

Choose suitable dopants

Not all elements in group 14 can be suitable dopants for GaAs. We should consider the lattice compatibility and chemical bonding properties. Carbon has a much smaller atomic radius and different chemical properties than Ga, so it is not a suitable dopant. Silicon and germanium are commonly used to dope GaAs, as their chemical properties and atomic radii are similar to Ga, which ensures good lattice compatibility. Tin is heavier than Ga and might introduce higher defect densities, so it is not as commonly used as Si and Ge.
04

Conclusion

To dope GaAs and make an n-type semiconductor by replacing Ga, suitable elements would be silicon (Si) and germanium (Ge), as they have 4 valence electrons and compatible lattice properties with 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

Which of the three-dimensional primitive lattices has a unit cell where none of the internal angles is \(90^{\circ}\) ? (a) Orthorhombic, (b) hexagonal, (c) rhombohedral, (d) triclinic, (e) both rhombohedral and triclinic.

Write the chemical equation that represents the formation of $$ \begin{array}{l}{\text { (a) polychloroprene from chloroprene (polychloroprene is }} \\ {\text { used in highway-pavement seals, expansion joints, con- }} \\\ {\text { veyor belts, and wire and cable jackets) }}\end{array} $$ $$ \begin{array}{c}{\mathrm{CH}_{2}=\mathrm{CH}-\underset{\mathrm{C}}{\mathrm{C}=\mathrm{CH}_{2}}} \\\ {\text { Chloroprene }}\end{array} $$ $$ \begin{array}{l}{\text { (b) polyacrylonitrile from acrylonitrile (polyacrylonitrile }} \\ {\text { is used in home furnishings, craft yarns, clothing, and }} \\ {\text { many other items). }}\end{array} $$ $$ \begin{array}{c}{\mathrm{CH}_{2}=\mathrm{CH}} \\ {\mathrm{I}} \\ {\text { Acrylonitrile }}\end{array} $$

One method to synthesize ionic solids is by the heating of two reactants at high temperatures. Consider the reaction of FeO with \(\mathrm{TiO}_{2}\) to form FeTiO \(_{3} .\) Determine the amount of each of the two reactants to prepare 2.500 \(\mathrm{g}\) FeTiO \(_{3},\) assuming the reaction goes to completion. (a) Write a balanced chemical reaction. (b) Calculate the formula weight of FeTiO_{3} . (c) Determine the moles of FeTiO_{3} . (d) Determine moles and mass (g) of FeO required. (e) Determine moles and mass (g) of TiO_ \(_{2}\) required.

You are given a white substance that melts at \(100^{\circ} \mathrm{C}\) . The substance is soluble in water. Neither the solid nor the solution is a conductor of electricity. Which type of solid (molecular, metallic, covalent- network, or ionic) might this substance be?

Indicate whether this statement is true or false: If you want a semiconductor that emits blue light, you could either use a material that has a band gap corresponding to the energy of a blue photon or you could use a material that has a smaller band gap but make an appropriately sized nanoparticle of the same material.
See all solutions

Recommended explanations on Chemistry Textbooks

Chemistry Branches

Read Explanation

Chemical Reactions

Read Explanation

Ionic and Molecular Compounds

Read Explanation

Physical Chemistry

Read Explanation

Making Measurements

Read Explanation

Chemical Analysis

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