Homework Answers
For a metal-metal junction the contact potential is simply the difference between the work function of the two metals.
Hence for a junction formed by Gold and Cesium contact potential is given by
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b) what is the contact potential, in eV, found in a metal-metal junction formed by gold...
The photoelectric work function energy for gold metal is 4.82 eV (per electron). What wavelength of...
The photoelectric work function energy for gold metal is 4.82 eV
(per electron). What wavelength of radiation must be directed at
the surface of gold metal in order to eject electrons electrons
having a maximum kinetic energy of 3.20×10 –20 Joules/electron.
[Note: The electron volt (eV) is a common energy unit for work
function energies. 1 eV = 1.602×10 –19 Joules.]
-20 The photoelectric work function energy for gold metal is 4.82 eV (per electron). What wavelength of radiation must...
An ideal metal-semiconductor (M-S) junction is formed on the n-type Si semiconductor that is uniformly doped...
An ideal metal-semiconductor (M-S) junction is formed on the n-type Si semiconductor that is uniformly doped with a donor impurity (phosphorus) concentration of 1016 cm. The metal work function is 4.5 eV, and the Si electron affinity is 4 eV. Assuming that this M-S junction is at 300K, give your best answers to the following questions. (50 points) (a) At thermal equilibrium, draw the energy band diagram including meaningful parameters (energy barriers, energy levels, depletion width, etc.). (b) Calculate the...
What is the contact potential of a layer of gold in contact with a layer of titanium? What is the direction of the electric field, towards the gold or towards the titanium? To answer this question, yo...
What is the contact potential of a layer of gold in contact with a layer of titanium? What is the direction of the electric field, towards the gold or towards the titanium? To answer this question, you will need to look up some physical properties of these metals in data tables.
A gold colored metal is found to conduct an electric current. Can you say with certainty...
A gold colored metal is found to conduct an electric current. Can you say with certainty that it is gold? Why or why not? No. A gold colored metal could be gold, but it may also be an alloy of gold. No. A gold colored metal could be gold, but it may also be a silver. No. A gold is not a good conductor. Yes. A gold colored metal is gold. b A gold colored metal is found to conduct...
4. Design a Schottky Contact with P-type Gallium Arsenide a. b. c. Identify a metal that forms a ...
4. Design a Schottky Contact with P-type Gallium Arsenide a. b. c. Identify a metal that forms a Schottky Contact at OV bias Sketch the Band-bending diagram a 0V bias Sketch the Band-bending diagram for Forward Bias and Reverse Bias, label the polarity of bias ypes ot Metal-Semiconddcto Contacts Metal Metal P-type implies holes are the majority Valence band determines MS junction behavior . N-type implies electrons are the majority Conduction band determines MS junction behavior . . N-type SchottkyP-type...
2. Design a Schottky Contact with N-type Silicon a. b. c. Identify a metal that farms a Schottky ...
2. Design a Schottky Contact with N-type Silicon a. b. c. Identify a metal that farms a Schottky Contact at 0V bias Sketch the Band-bending diagram a 0V bias Sketch the Band-bending diagram for Forward Bias and Reverse Bias, label the polarity of bias. ypes ot Metal-Semiconductor Contacts Metal Metal N-type implies electrons are the majority Conduction band determines MS junction behavior type implies holes are the majority Valence band determines MS junction behavior . . N-type Schottky P-type Schottky...
4) --Given Values-- Energy for Vacancy Formation (eV/atom): = 0.38 Metal: = Barium Temperature ( C...
4) --Given Values-- Energy for Vacancy Formation (eV/atom): = 0.38 Metal: = Barium Temperature ( C ) = 663 Alloy Metal A = Cesium Alloy Metal B = Niobium Metal-X = Vanadium Metal-Y = Iron Magnification = 401 ASTM Grain Size = 7 Grain per Square Inches = 612 4) For an alloy that constists of 75 at% of Alloy Metal and 25% of Alloy Metal B, what is the concentration of Alloy Metal B in wt%?
Draw an equilibrium band diagram for Si p-n junction and find contact potential? if energy between...
Draw an equilibrium band diagram for Si p-n junction and find contact potential? if energy between Fermi level and conduction band of n-type 97 meV and energy between Fermi level and valence band of p-type 67 meV ?
Consider an abrupt p-n junction formed by two steps; an entire silicon sample was first doped...
Consider an abrupt p-n junction formed by two steps; an entire silicon sample was first doped with 1.0E+15 cm-3 acceptors (step I), and then a half of the sample was doped with 2.0E+15 cm-3 donors at room temperature (step II). a. Calculate the Fermi levels on each side of the junction with respect to Ei. Use the Special Conditions to find the concentrations. b. Calculate the contact potential. c. Calculate the ratio , Xpo/Xno
Light of wavelength 400 nm is incident on a metal surface. The stopping potential for the...
Light of wavelength 400 nm is incident on a metal
surface. The stopping
potential for the resulting electrons is 0.91 V.
a) What is the work function of the metal?
b) Identify the metal. (Use the Table)
c) What is the cut-off frequency for this target?
76 Chapter 3 Waves and Particles 1: Electromagnetic Radia TABLE 3.1 Metal Work Function in eV) Cesium Potassium Sodium Magnesium 19 2.2 2.3 3.7 are ejected if the intensi surable time might be ne...
The photoelectric work function energy for gold metal is 4.82 eV
(per electron). What wavelength of radiation must be directed at
the surface of gold metal in order to eject electrons electrons
having a maximum kinetic energy of 3.20×10 –20 Joules/electron.
[Note: The electron volt (eV) is a common energy unit for work
function energies. 1 eV = 1.602×10 –19 Joules.]
-20 The photoelectric work function energy for gold metal is 4.82 eV (per electron). What wavelength of radiation must...
An ideal metal-semiconductor (M-S) junction is formed on the n-type Si semiconductor that is uniformly doped with a donor impurity (phosphorus) concentration of 1016 cm. The metal work function is 4.5 eV, and the Si electron affinity is 4 eV. Assuming that this M-S junction is at 300K, give your best answers to the following questions. (50 points) (a) At thermal equilibrium, draw the energy band diagram including meaningful parameters (energy barriers, energy levels, depletion width, etc.). (b) Calculate the...
4. Design a Schottky Contact with P-type Gallium Arsenide a. b. c. Identify a metal that forms a Schottky Contact at OV bias Sketch the Band-bending diagram a 0V bias Sketch the Band-bending diagram for Forward Bias and Reverse Bias, label the polarity of bias ypes ot Metal-Semiconddcto Contacts Metal Metal P-type implies holes are the majority Valence band determines MS junction behavior . N-type implies electrons are the majority Conduction band determines MS junction behavior . . N-type SchottkyP-type...
2. Design a Schottky Contact with N-type Silicon a. b. c. Identify a metal that farms a Schottky Contact at 0V bias Sketch the Band-bending diagram a 0V bias Sketch the Band-bending diagram for Forward Bias and Reverse Bias, label the polarity of bias. ypes ot Metal-Semiconductor Contacts Metal Metal N-type implies electrons are the majority Conduction band determines MS junction behavior type implies holes are the majority Valence band determines MS junction behavior . . N-type Schottky P-type Schottky...
Light of wavelength 400 nm is incident on a metal
surface. The stopping
potential for the resulting electrons is 0.91 V.
a) What is the work function of the metal?
b) Identify the metal. (Use the Table)
c) What is the cut-off frequency for this target?
76 Chapter 3 Waves and Particles 1: Electromagnetic Radia TABLE 3.1 Metal Work Function in eV) Cesium Potassium Sodium Magnesium 19 2.2 2.3 3.7 are ejected if the intensi surable time might be ne...
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