In a p type semiconductor the acceptor level is situated 50 meV above the valence band. The maximum wavelength of light required to produce a hole will be:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → $2.48 × 10^{-5} m$
Energy required to excite an electron from the valence bond, $E=50meV$
and,
the relationship between the energy E of light is,
$E=\frac{hc}{λ}=\frac{4.135×10^{-15}×3×10^8}{50×10^{-3}}$
$=2.48 × 10^{-5} m$