Assertion (A) : `Si` and `GaAs` are preferred materials for solar cells Reason (R ) : Energy
Channel: Doubtnut
Date: 2020-08-16

Assertion (A) : `Si` and `GaAs` are preferred materials for solar cells  Reason (R ) : Energy gap of `Si` is `1.1 eV` and that of `GaAs` is `1.53 eV` which gives maximum irradiance where as other materials like `CdS` or `CdSe (E_(g) = 2.4 eV)` and `PbS (E_(g) = 0.4 eV)` given minimum irradiance.