The figure to the right shows sunlight intensity as a function of wavelength. Answer the following questions about materials that could act as the absorber (p-type semiconductor) in a heterojunction solar cell. a.What advantage would there be in using a 1000-nm wavelength bandgap absorber vs. one that had a 400-nm wavelength bandgap? (HINT: the bandgap is the minimum energy required to promote electrons.) b. One reason the electron-volt (eV) is often used as the bandgap unit in solar cell research is that the bandgap in eV is also equal to the maximum voltage that can be generated by the solar cell. With this in mind, what advantage would there be in using a 400-nm wavelength bandgap absorber vs. one that had a 1000-nm wavelength bandgap? c.In light of your answers to (a) and (b), can there be one “best” bandgap to use in a solar cell?
The figure to the right shows sunlight intensity as a function of wavelength. Answer the following questions about materials that could act as the absorber (p-type semiconductor) in a heterojunction solar cell. a.What advantage would there be in using a 1000-nm wavelength bandgap absorber vs. one that had a 400-nm wavelength bandgap? (HINT: the bandgap is the minimum energy required to promote electrons.) b. One reason the electron-volt (eV) is often used as the bandgap unit in solar cell research is that the bandgap in eV is also equal to the maximum voltage that can be generated by the solar cell. With this in mind, what advantage would there be in using a 400-nm wavelength bandgap absorber vs. one that had a 1000-nm wavelength bandgap? c.In light of your answers to (a) and (b), can there be one “best” bandgap to use in a solar cell?
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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The figure to the right shows sunlight intensity as a function of wavelength. Answer the following questions about materials that could act as the absorber (p-type semiconductor) in a heterojunction solar cell.
a.What advantage would there be in using a 1000-nm wavelength bandgap absorber vs. one that had a 400-nm wavelength bandgap? (HINT: the bandgap is the minimum energy required to promote electrons.)
b. One reason the electron-volt (eV) is often used as the bandgap unit in solar cell research is that the bandgap in eV is also equal to the maximum voltage that can be generated by the solar cell. With this in mind, what advantage would there be in using a 400-nm wavelength bandgap absorber vs. one that had a 1000-nm wavelength bandgap?
c.In light of your answers to (a) and (b), can there be one “best” bandgap to use in a solar cell?
Transcribed Image Text:2.5
UV
visible
Infrared
m'nm
2.0
1.5
Solar Spectrum
outside atmosphere
1.0
0.5
0.0
1000
2000
wavelength (nm)
Spectral Irradiance
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