Question

In solar cell, why $GaAs$ preferred over $Si$?

• A. Because $GaAs$ is cheap.
• B. Because $GaAs$ bandgap is lower than $Si$ bandgap.
• C. Because $GaAs$ has better absorptive nature than $Si$.
• D. Because $GaA$ is abundant is nature.

Answer 1

The correct option is C Because $GaAs$ has better absorptive nature than $Si$.

$GaAs$ (gallium arsenide) is most commonly used in making of a solar cell, because it absorbs relatively more energy from the incident solar radiations having relatively higher absorption co-efficient.