A photovoltatic cell created from a semiconductor with band gap 1.4 eV is coated on its...
A photovoltatic cell created from a semiconductor with band gap 1.4 eV is coated on its top (light receiving) surface with another semiconductor with band gap 2.5 eV. Compute the maximum potential fraction of incident radiation converted to useful power if this cell is illuminated by light with wavelengths uniformly distributed between 400 and 700 nm. Assume the top semiconductor layer does not contribute to electrical power production.
Homework Answers
Add Answer to:
A photovoltatic cell created from a semiconductor with band gap
1.4 eV is coated on its...
QUESTION 9 If a semiconductor with a larger bandgap than Si is used in a single...
QUESTION 9 If a semiconductor with a larger bandgap than Si is used in a single junction photovoltaic cell, which of the following (may be more than one) will be true? The efficiency of the cell will increase. The cell will be less effective at converting IR radiation from the sun to electricity. The semiconductor will not require doping. The cell will be more effective at converting higher energy solar photons (corresponding to its band gap) to electricity. QUESTION 10...
3. Many parameters of crystals are dependent on the band gap. a) From the optical absorption...
3. Many parameters of crystals are dependent on the band gap. a) From the optical absorption spectrum of a certain semiconductor, one finds that the longest wavelength of radiation absorbed is 1.40 m. What is the band gap for this semiconductor? Explain how the band gap gives rise to this behavior. b) What band gap would be needed to make blue (450 nm) LEDs? Explain why. c) Most of the sun's radiation has wavelengths shorter than 1000 nm. For a...
A 0.5 m thick sample of um thick sample of In is illuminated with monochromatic light...
A 0.5 m thick sample of um thick sample of In is illuminated with monochromatic light of hv=1.5 eV. The absorption coefficient 104 cm 1. The power incident on the sample is 15 mW. (a) Find the total energy absorbed by the sample per second (J/sec). (b) Find the rate of excess thermal energy given up by the electrons to the lattice before recombination (J/sec). (c) Find the number of photons per second given off from recombination events, assuming perfect...
Theory section is below for the equations PRELAB Read the theory section below. Calculate the photon...
Theory section is below for the equations
PRELAB Read the theory section below. Calculate the photon wavelength in nm corresponding to a photon energy equal to the theoretical band gap energy of S1.121 eV and GaAs, 1.422 eV. These will be used to set the monochromator. THEORY One of the most important characteristics of a semiconductor is its band gap energy Eg Whereas an electron in an isolated atom has discrete energy levels, an electron in a semiconductor crystal has...
summatize the following info and break them into differeng key points. write them in yojr own...
summatize the following info and break them into differeng key points. write them in yojr own words
apartus
6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...
QUESTION 9 If a semiconductor with a larger bandgap than Si is used in a single junction photovoltaic cell, which of the following (may be more than one) will be true? The efficiency of the cell will increase. The cell will be less effective at converting IR radiation from the sun to electricity. The semiconductor will not require doping. The cell will be more effective at converting higher energy solar photons (corresponding to its band gap) to electricity. QUESTION 10...
3. Many parameters of crystals are dependent on the band gap. a) From the optical absorption spectrum of a certain semiconductor, one finds that the longest wavelength of radiation absorbed is 1.40 m. What is the band gap for this semiconductor? Explain how the band gap gives rise to this behavior. b) What band gap would be needed to make blue (450 nm) LEDs? Explain why. c) Most of the sun's radiation has wavelengths shorter than 1000 nm. For a...
A 0.5 m thick sample of um thick sample of In is illuminated with monochromatic light of hv=1.5 eV. The absorption coefficient 104 cm 1. The power incident on the sample is 15 mW. (a) Find the total energy absorbed by the sample per second (J/sec). (b) Find the rate of excess thermal energy given up by the electrons to the lattice before recombination (J/sec). (c) Find the number of photons per second given off from recombination events, assuming perfect...
Theory section is below for the equations
PRELAB Read the theory section below. Calculate the photon wavelength in nm corresponding to a photon energy equal to the theoretical band gap energy of S1.121 eV and GaAs, 1.422 eV. These will be used to set the monochromator. THEORY One of the most important characteristics of a semiconductor is its band gap energy Eg Whereas an electron in an isolated atom has discrete energy levels, an electron in a semiconductor crystal has...
summatize the following info and break them into differeng key points. write them in yojr own words
apartus
6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...
Most questions answered within 3 hours.
-
Calculate and plot the number and weight distributions of x-mers
found in a step-growth polymerization for...
asked 3 minutes ago -
The Baily Corporation has developed a specialized software
program that improves inventory control capability. The following...
asked 6 minutes ago -
Problem 5-4A (Part Level Submission) Wolford Department Store is
located in midtown Metropolis. During the past...
asked 6 minutes ago -
Preparation of Benzoic Acid using a Grignard Reagent URGENT
1. During your Grignard formation, a small...
asked 30 minutes ago -
A uniform magnetic field is perpendicular to the plane of a wire
loop. If the loop...
asked 28 minutes ago -
At the peak of your career, your were earning $120,000 and
holding a top level position....
asked 32 minutes ago -
. A permanent magnet is dropped south-end-down through a horizontal
circular coil with a radius of...
asked 34 minutes ago -
Bernie's Beverages purchased some fixed assets classified as
5-year property for MACRS. The assets cost $28,000....
asked 48 minutes ago -
How many ATPs are produced from the catabolism of a 10-C
molecule of fatty acid under...
asked 52 minutes ago -
Before practicing a routine on the rings, a 64.8 kg gymnast
hangs motionless, with one hand...
asked 54 minutes ago -
If the K b of a weak base is 6.3 × 10 − 6 , what...
asked 1 hour ago -
Which of the following is the minimum amount of moles of NaOH
that must be added...
asked 1 hour ago