The material used for solar cell should have band gap
(A) equal to zero.
(B) equal to $0.08$ eV.
(C) between $1.0$ eV to $1.8$ eV.
(D) equal to $2$ eV.

Question

The material used for solar cell should have band gap (A) equal to zero. (B) equal to 0.08 eV. (C) between 1.0 eV to 1.8 eV. (D) equal to 2 eV.

TestHub · Accepted Answer

The solar spectrum has maximum intensity at an energy of about $1.5$ eV.

To maximize the absorption of solar radiation and the efficiency of the solar cell, the band gap of the semiconductor should be close to $1.5$ eV.

Commonly used materials for solar cells include Silicon ( $E_{g} \approx 1.1$ eV) and GaAs ( $E_{g} \approx 1.43$ eV).

Therefore, the ideal band gap for a solar cell material is between $1.0$ eV and $1.8$ eV.

Answer: C

Physics - Semiconductors Question with Solution | TestHub

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