Essential University Physics: Volume 2 (3rd Edition)
3rd Edition
ISBN: 9780321976420
Author: Richard Wolfson
Publisher: PEARSON
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Question
Chapter 37, Problem 11FTD
To determine
To explain: Why does the size of band gap determines whether a material is insulator or a semiconductor.
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Students have asked these similar questions
Which statement about the intrinsic carrier concentration in a semiconductor material is FALSE?
The intrinsic carrier concentration is exponentially dependent on the inverse of the temperature of the semiconductor material.
In an intrinsic semiconductor material, the concentration of electrons in the conduction band is equal to the concentration holes in the valence band.
The intrinsic carrier concentration of a semiconductor material at a constant temperature depends on the Fermi energy.
The intrinsic Fermi energy is positioned near the center of the bandgap for an intrinsic semiconductor.
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A p-n heterojunction is formed though Semiconductor A intimately contacting with
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— 1.3 eV, Egв
= 2.8 eV
1.5 eV, Efa = 2.9 eV, Efb = 2.0 eV,EgA
%3D
%3D
ХА 3 2.0 еV, Хв 3D
(a)
Sketch the band diagram for the p-n heterojunction under the thermal equilibrium
condition.
The vacuum level
Хв
XA
ECB
ECA-
EFB
EFA
EVA
gB
EvB
Semiconductor A
Semiconductor B
Chapter 37 Solutions
Essential University Physics: Volume 2 (3rd Edition)
Ch. 37.1 - Prob. 37.1GICh. 37.2 - If a scientist uses microwave technology to study...Ch. 37.3 - Prob. 37.3GICh. 37 - If you push two atoms together to form a molecule,...Ch. 37 - Prob. 2FTDCh. 37 - Prob. 3FTDCh. 37 - Does it make sense to distinguish individual NaCl...Ch. 37 - Prob. 5FTDCh. 37 - Prob. 6FTDCh. 37 - Radio astronomers have discovered many complex...
Ch. 37 - Prob. 8FTDCh. 37 - Prob. 9FTDCh. 37 - Prob. 10FTDCh. 37 - Prob. 11FTDCh. 37 - Prob. 12FTDCh. 37 - Prob. 13FTDCh. 37 - Prob. 14FTDCh. 37 - Prob. 15FTDCh. 37 - Prob. 16ECh. 37 - Prob. 17ECh. 37 - Prob. 18ECh. 37 - Prob. 19ECh. 37 - Prob. 20ECh. 37 - Prob. 21ECh. 37 - Prob. 22ECh. 37 - Prob. 23ECh. 37 - Prob. 24ECh. 37 - Prob. 25ECh. 37 - Prob. 26ECh. 37 - Prob. 27ECh. 37 - Prob. 28ECh. 37 - Prob. 29PCh. 37 - Prob. 30PCh. 37 - Prob. 31PCh. 37 - Prob. 32PCh. 37 - Prob. 33PCh. 37 - Prob. 34PCh. 37 - Prob. 35PCh. 37 - Prob. 36PCh. 37 - Prob. 37PCh. 37 - Prob. 38PCh. 37 - Prob. 39PCh. 37 - Prob. 40PCh. 37 - Prob. 41PCh. 37 - Prob. 42PCh. 37 - Prob. 43PCh. 37 - Prob. 44PCh. 37 - Prob. 45PCh. 37 - Prob. 46PCh. 37 - Prob. 47PCh. 37 - Prob. 48PCh. 37 - Prob. 49PCh. 37 - Prob. 50PCh. 37 - Prob. 51PCh. 37 - Prob. 52PCh. 37 - Prob. 53PCh. 37 - Prob. 54PCh. 37 - The critical field in a niobium-titanium...Ch. 37 - The transition from the ground state to the first...Ch. 37 - Prob. 57PCh. 37 - Prob. 58PCh. 37 - Youre troubled that Example 37.1 neglects the mass...Ch. 37 - Prob. 60PCh. 37 - The Madelung constant (Section 37.3) is...Ch. 37 - Prob. 62PCh. 37 - (a) Count the number of electron states N(E) with...Ch. 37 - Prob. 64PCh. 37 - Prob. 65PCh. 37 - Prob. 66PCh. 37 - Prob. 67PCh. 37 - Prob. 68PPCh. 37 - Prob. 69PPCh. 37 - Prob. 70PPCh. 37 - Prob. 71PP
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Similar questions
- What is the main difference between an insulator and a semiconductor?arrow_forwardWhy does the horizontal Line in the graph in Figure 9.12 suddenly stop at the Fermi energy? Figure 9.12 (a) Density of state for a free electron gas; (b) probability that a state is occupied at T = 0 K; (c) density if occupied states at T = 0 k.arrow_forwardIf the election number density (N/V) of a metal increases by a factor 8, what happens to the Fermi energy (EF)?arrow_forward
- An n-type semiconductor has an intrinsic concentration of 1.45 x 10^16/m^3. Given that the mobilities of electrons and holes are 0.4m^2/V-s and 0/2m^2/V-s, respectively, determine the conductivity of the semiconductor (A) before, and (B) after the addition of 5 x 10^23 Sb Atoms/m^3arrow_forwardAre there more electrons at the bottom or in the middle of the conduction band of a semiconductor?arrow_forwardA pure semiconductor has a band gap of 1.25 eV. The effective masses of electron and hole are 0.1me and 0.5me respectively, where me is the free electron mass. The carrier scattering time is 0.2 ps (Pico seconds). Find the following at a temperature of 300 K(a) Concentration of electrons and holes(b) Fermi energy(c) Electron and hole mobilities(d) Electrical conductivityarrow_forward
- In the band theory of solids, if, at T = 0 K, the uppermost band to have electrons is completely filled, and the gap between that band and the next lowest band is 8 eV, is the material a metal, an insulator, or a semiconductor? and explain using band level diagram. What if the gap is 0.8 eV?arrow_forwardIn an N-type semiconductor at T = 300 K, the electron concentration varies linearly from 2 x 10^18 to 5 X 10^17 per cc over a distance of 1.5 mm and the diffusion current density is 360 A/cm^2. Find the mobility of electrons.arrow_forwardPlot the temperature dependence of the depletion width of the semiconductor-metal junction whose capacitance-voltage data at room temperature is given below. The dielectric constant of the SC material is 10. Use data extrapolation if you feel necessary. Clearly state your assumptions. 75 70 65 60 CAPACITANCE 55 (pF) 50 45 40 35 REVERSE BIAS FORWARD BIAS 30 -6 -4 -3 -2 -1 2 VOLTAGE (M)arrow_forward
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