Introduction to solar cells week 3 part C

Introduction to solar cells

week 3 part C

link to join this course https://www.coursera.org/learn/solar-cells

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Efficiency

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1.Question 1

Spectral efficiency

Which of the following spectra would have the highest spectral efficiency?

Spectrum A

Spectrum B

Spectrum A and B will have the same spectral efficiency

Correct

That is correct

A narrow spectrum will have a higher spectral efficiency as compared to a wider spectrum.

1 / 1 point

2.Question 2

Select the correct statement(s) that apply to a monolithic multilayer solar cell (tandem).

The first (or top) semiconductor layer will have smallest band gap

The current is limited by layer with the lowest current

The open circuit voltage is the sum of the open circuit voltages from each layer

The voltage is limited by layer with the lowest voltage

0.5 / 1 point

3.Question 3

The graph below depicts the theoretical efficiency limit of a silicon solar cell.

Why are there "wrinkels" on the graph?

main tera hero, like

Correct

The theoretical efficiency is calculated based on the AM1.5 spectrum and therefore the wrinkles corresponds to the atmospheric absorption bands.

1 / 1 point

4.Question 4

A filter is placed in front of an AM1.5 light source, but the short circuit current remains unchanged. This could be due to the fact that ...

AM1.5 is insensitive to filtering

The below bandgap light was cut-off

The above bandgap light was cut-off

Correct

That is correct

Because the filtered light is below bandgap it did not contribute to the short circuit current.