College Physics (10th Edition)
10th Edition
ISBN: 9780321902788
Author: Hugh D. Young, Philip W. Adams, Raymond Joseph Chastain
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Question
Chapter 29, Problem 31GP
(a)
To determine
Find the band gap energy of silicon photocell.
(b)
To determine
What is the reason for pure silicon is opaque.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
We have a piece of Si (shown below) with dimensions 50 um x 200 um x 0.25 um. The
Silicon is doped uniformly with ND = 1014 cm3.
What is the resistance of the slab when measured along the length (200 um)?
%3|
If a light with photonic energy greater than the bandgap of Si were to be shone from
the top surface such that it produces uniform hole-electron pairs Ap =An = 5E12 cm-3
throughout the slab, what would be the ratio of the illuminated conductivity vs the
dark conductivity?
What is the ratio of conductivity due to holes vs the conductivity due to electrons
under illumination? How about in the dark?
200 Nm
Q#07: The maximum wavelength of light that a certain silicon photocell can detect is 1.11 micrometer (a) what is he energy gap (in eV) between the valence and conduction bands for this photocell (b) Explain why pure silicon is opaque.
The gap between valence and conduction bands in diamond is 5.47 eV. (a) What is the maximum wavelength of a photon that can excite an electron from the top of the valence band into the conduction band? In what region of the electromagnetic spectrum does this photon lie? (b) Explain why pure diamond is transparent and colorless. (c) Most gem diamonds have a yellow color. Explain how impurities in the diamond can cause this color.
Chapter 29 Solutions
College Physics (10th Edition)
Ch. 29 - Prob. 1CQCh. 29 - Prob. 2CQCh. 29 - Prob. 3CQCh. 29 - Prob. 4CQCh. 29 - Prob. 5CQCh. 29 - Prob. 6CQCh. 29 - Prob. 7CQCh. 29 - Prob. 8CQCh. 29 - Prob. 9CQCh. 29 - Prob. 10CQ
Ch. 29 - Prob. 1MCPCh. 29 - Prob. 2MCPCh. 29 - Prob. 3MCPCh. 29 - Prob. 4MCPCh. 29 - Prob. 5MCPCh. 29 - Prob. 6MCPCh. 29 - Prob. 7MCPCh. 29 - Prob. 8MCPCh. 29 - Prob. 9MCPCh. 29 - Prob. 10MCPCh. 29 - Prob. 1PCh. 29 - Prob. 2PCh. 29 - Prob. 3PCh. 29 - Prob. 4PCh. 29 - Prob. 5PCh. 29 - What is the ratio of the number of different 3d...Ch. 29 - Prob. 7PCh. 29 - Prob. 8PCh. 29 - Prob. 9PCh. 29 - Prob. 10PCh. 29 - For bromine (Z = 35), make a list of the number of...Ch. 29 - (a) Write out the electron configuration (1s2 2s2,...Ch. 29 - Prob. 13PCh. 29 - Prob. 14PCh. 29 - Prob. 15PCh. 29 - Prob. 16PCh. 29 - Prob. 17PCh. 29 - Prob. 18PCh. 29 - Prob. 19PCh. 29 - Prob. 20PCh. 29 - Prob. 21PCh. 29 - Prob. 22PCh. 29 - Prob. 23PCh. 29 - Prob. 24PCh. 29 - Prob. 25PCh. 29 - Prob. 26PCh. 29 - Prob. 27GPCh. 29 - Prob. 28GPCh. 29 - An electron has spin angular momentum and orbital...Ch. 29 - Prob. 30GPCh. 29 - Prob. 31GPCh. 29 - Prob. 32GPCh. 29 - Prob. 33GPCh. 29 - Prob. 34GPCh. 29 - Prob. 35GPCh. 29 - Prob. 36GPCh. 29 - Prob. 37GPCh. 29 - Prob. 38GPCh. 29 - Prob. 39PPCh. 29 - Prob. 40PPCh. 29 - Prob. 41PPCh. 29 - Prob. 42PP
Knowledge Booster
Similar questions
- (a) A photodiode used in a solar cell is designed to absorb light with a wavelength less than or equal to 1 µm. What is the minimum energy band gap (in eV) for the material making up the photodiode? (b) What If? Cadmium telluride (CdTe) has an energy gap at 300 K of 1.56 eV. What maximum wavelength of sunlight (in nm) could be absorbed by a solar cell consisting of CdTe?arrow_forwardThe gap between valence and conduction bands in diamond is 5.47 eV.What is the maximum wavelength of a photon that can excite an electron from the top of the valence band into the conduction band? In what region of the electromagnetic spectrum does this photon lie?arrow_forwardQuestion 2: The Fermi energy level for a particular material at T = 300 K is 5.50 eV. The electrons in this material follow the Fermi-Dirac distribution function. ] Find the probability of an energy level at 5.50 eV being occupied by an b) [ Repeat part (a) if the temperature is increased to T = 600 K. (Assume that EF is a constant.). r a) [ c) electron. ] Calculate the energy level where probability of finding an electron at room temperature is 70%. d) L 1 Calculate the temperature at which there is a 7 percent probability that a state 0.4 eV below the Fermi level will be empty of an electron.arrow_forward
- Silicon is doped with 3×1018 arsenic atoms/cm3 and 8 × 1018 boron atoms/cm3. (a) Is this n- or p-type silicon? (b) What are the hole and electron concentrations at room temperature?arrow_forwardFor silicon the conduction band minimum is located at 0.49 Å-1 in the [100] direction (X is the Brillouin zone at H00), while the valence band maximum is located at the Γ point (k = 0).a) What is the wavelength and energy of photons needed to supply the required momentum to excite an electron from the Γ point to the conduction band minimum? b) What is the wavelength of photons needed to supply the required energy to excite an electron from the Γ point to the conduction band minimum?c) What limits optical absorption in silicon at photon energies near the band gap?arrow_forward(a) For indium phosphide (InP) at room temperature, calculate the electron and hole mobilities for the following cases : For intrinsic InP, the electrical conductivity, the number of electrons per cubic meter and the number of holes per cubic meter are 2.5 x 10-6 (22m)¹, 3× 10¹3 m -3 and 3 x 1013 m3, respectively. Similarly, for n-type extrinsic InP, the electrical conductivity, the number of electrons per cubic meter and the number of cubic meter holes per 3-6x 10-6 (2m), 4.5 × 10¹3-3 2 x 10¹3 m³, respectively. are andarrow_forward
- The conductivity of an intrinsic silicon sample is found to be 1.02 m.S.m-1 at 297.2 K and 2.15 mS.m-1 at 307.9 K. What is the bandgap energy in silicon? (Boltzmann constant: 1.38064852 * 10-23 m². kg. s-². K−¹) Answer:arrow_forward(a) Suppose a piece of very pure germanium is to be used as a light detector by observing, through the absorption of photons, the increase in conductivity resulting from generation of electron–hole pairs. If each pair requires 0.67 eV of energy, what is the maximum wavelength that can be detected? In what portion of the spectrum does it lie? (b) What are the answers to part (a) if the material is silicon, with an energy requirement of 1.12 eV per pair, corresponding to the gap between valence and conduction bands in that element?arrow_forwardThe gap between valence and conduction bands in silicon is 1.12 eV. A nickel nucleus in an excited state emits a gamma-ray photon with wavelength 9.31 * 10-4 nm. How many electrons can be excited from the top of the valence band to the bottom of the conduction band by the absorption of this gamma ray?arrow_forward
- ASAParrow_forward(a) Describe the free electron gas model of metals. How does it help to explain the lattice heat capacity and electrical conductivity of metals?arrow_forward(a) What is the minimum donor doping required to convert silicon into a conductor based on the definitions in Table ? (b) What is the minimum acceptor doping required to convert silicon into a conductor?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
University Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSON
Introduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Lecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
University Physics (14th Edition)
Physics
ISBN:9780133969290
Author:Hugh D. Young, Roger A. Freedman
Publisher:PEARSON
Introduction To Quantum Mechanics
Physics
ISBN:9781107189638
Author:Griffiths, David J., Schroeter, Darrell F.
Publisher:Cambridge University Press
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:9780321820464
Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...
Physics
ISBN:9780134609034
Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:PEARSON