(a)
Interpretation:
Whether the given combination of elements would produce a semiconductor or not has to be explained
Concept Introduction:
Semiconductors are substances that conduct electricity either by addition of an impurity or by the effects of temperature on it. Semiconductors electrically conductivity lie between conductor and insulator. Semiconductors have small energy gap between valence band and conduction band.
The only elemental form of semiconductors is germanium, silicon and carbon (graphite form) whereas other semiconductors will have combination of elements whose valence electron count will total up to eight.
(b)
Interpretation:
Whether the given combination of elements would produce a semiconductor or not has to be explained
Concept Introduction:
Semiconductors are substances that conduct electricity either by addition of an impurity or by the effects of temperature on it. Semiconductors electrically conductivity lie between conductor and insulator. Semiconductors have small energy gap between valence band and conduction band.
The only elemental form of semiconductors is germanium, silicon and carbon (graphite form) whereas other semiconductors will have combination of elements whose valence electron count will total up to eight.
(c)
Interpretation:
Whether the given combination of elements would produce a semiconductor or not has to be explained
Concept Introduction:
Semiconductors are substances that conduct electricity either by addition of an impurity or by the effects of temperature on it. Semiconductors electrically conductivity lie between conductor and insulator. Semiconductors have small energy gap between valence band and conduction band.
The only elemental form of semiconductors is germanium, silicon and carbon (graphite form) whereas other semiconductors will have combination of elements whose valence electron count will total up to eight.
(d)
Interpretation:
Whether the given combination of elements would produce a semiconductor or not has to be explained
Concept Introduction:
Semiconductors are substances that conduct electricity either by addition of an impurity or by the effects of temperature on it. Semiconductors electrically conductivity lie between conductor and insulator. Semiconductors have small energy gap between valence band and conduction band.
The only elemental form of semiconductors is germanium, silicon and carbon (graphite form) whereas other semiconductors will have combination of elements whose valence electron count will total up to eight.
(e)
Interpretation:
Whether the given combination of elements would produce a semiconductor or not has to be explained
Concept Introduction:
Semiconductors are substances that conduct electricity either by addition of an impurity or by the effects of temperature on it. Semiconductors electrically conductivity lie between conductor and insulator. Semiconductors have small energy gap between valence band and conduction band.
The only elemental form of semiconductors is germanium, silicon and carbon (graphite form) whereas other semiconductors will have combination of elements whose valence electron count will total up to eight.
Want to see the full answer?
Check out a sample textbook solution
Chapter 24 Solutions
Chemistry: Atoms First
- 8.96 A business manager wants to provide a wider range of p- and n-type semiconductors as a strategy to enhance sales. You are the lead materials engineer assigned to communicate with this manager. How would you explain why there are more ways to build a p-type semiconductor from silicon than there are ways to build an n-type semiconductor from silicon?arrow_forwardThe maximum wavelength of light that a certain silicon photocell can detect is 1.11 μm. (a) What is the energy gap (in electron volts) between the valence and conduction bands for this photocell? (b) Explain why pure silicon is opaque.arrow_forwardDefine a semiconductor? Describe the two main types of semiconductorswhen it is doped with(a) group 13 element, (b) group 15 element.arrow_forward
- (a) Why electrical conductivity of the semiconductor increases with increase in temperature? Illustrate and explain the above effect with hypothetical band energy diagrams, showing one at 25 °C and another at 50 °C? (b) The number average molecular weight of polyvinyl chloride (PVC) is 110000 g/mol and the Polydispersity index (PDI) is 1.3. What is the weight average molecular weight and degree of polymerization of PVC? Note: Molar mass of vinyl chloride is 62.498 g/molarrow_forwardChoose the options that would form a p-type semiconductor. Choose all that would make a p-type semiconductor, there may be more than one. Antimony doped with Germanium Germanium doped with Phosphorus Tin doped with Arsenic Silicon doped with Aluminum Arsenic doped with Telluriumarrow_forwardFor each of the following pairs of semiconductors, pick which one would have the larger bandgap. Explain your answer. i. ZnS and ZnSe ii. Si and AlP iii. GaN and InParrow_forward
- What is the main element used in the manufacture of solar cells. Explain how additional elements are used to change the conductivity of the material and produce N-type and P-type semiconductorsarrow_forwardA compound of Sn, Cd and P are mixed together to synthesize a semiconductor. The phosphorous atoms reside in the corners and faces of a cube and the Cd and Sn atoms each reside in 1/4 of the tetrahedral holes. Provide the formula for the compound.arrow_forwardConsider a semiconductor with a bandgap of 1.42 eV with a uniform electric field of 1 × 106 V/m pointing along the positive x-axis. Draw the CB and VB as a function of position along the x-axis. Assume that the length of this isolated piece of semiconductor in the x- direction is 10 μm. An electron is placed at the center of this semiconductor with no KE (KE = 0) at time t = 0. If the electron does not either gain or lose total energy, plot the x-location of this electron with time. What is the maximum KE that this electron can have at any time? In the plot of the CB and VB, indicate the location of the electron when the KE is maximum. Neglect gravitational potential energy.arrow_forward
- If a p-type semiconductor is made up of germanium, which of the following elements could be the dopant: Ga, Si, or P? Show your solution in terms of illustration. The number of valence electrons for Ge, Ga, Si and P are 4, 3, 4 and 5, respectively.arrow_forwardSilicon (Si) and germanium (Ge) can be used as semiconducting materials. The band gap between the conduction band and valence band is measured in electron volts, eV. 1 eV = 1.6022 × 10⁻¹⁹J. The band gap of each semiconductor was measured, and the two values were found to be 0.69 eV and 1.12 eV. Which of the two values belongs to Ge? A) 0.69 eV B) 1.12 eV C) Cannot be determined without further information.arrow_forwardExplain how metallic conductors, semiconductors, and insulators are identified and explain their properties in terms of band theory. Why is graphite an electronic conductor and diamond an insulator?arrow_forward
Physical ChemistryChemistryISBN:9781133958437Author:Ball, David W. (david Warren), BAER, TomasPublisher:Wadsworth Cengage Learning,
Chemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage Learning
Chemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
Chemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
Principles of Modern ChemistryChemistryISBN:9781305079113Author:David W. Oxtoby, H. Pat Gillis, Laurie J. ButlerPublisher:Cengage Learning