MHT CET 2026 Physics question
Not in JEE Advanced syllabus
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
Answer: (C)
Solution
A solar cell works by absorbing photons that have enough energy to lift electrons across the band gap and create electron-hole pairs. Most of the solar spectrum has photon energies of about 1 to 3 eV, and the best conversion is obtained with a band gap between 1.0 eV and 1.8 eV (silicon is about 1.1 eV, GaAs about 1.4
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