Question

what is solar cell?whySi and GaAs are more preferred material for solar cells?​

Answer 1

Answer:

Solar radiation spectrum has maximum intensity for energy value of approximately 1.5 eV. So , semiconductor with band gap ~1.5 eV or less (e.g. Si) are preferred . GaAs has band gap of ~1.53 eV but has very large absorbing capacity hence they are preferred.