1. Tardigrade
  2. Question
  3. Physics
  4. If the energy of a photon of sodium light (λ=580 nm ) equals the band gap of semiconductor, the minimum energy required to create hole electron pair.

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. If the energy of a photon of sodium light $(\lambda=580\, nm )$ equals the band gap of semiconductor, the minimum energy required to create hole electron pair.

Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

Using $E=E_{g}=\frac{h c}{\lambda}=\frac{6.6 \times 10^{-34} \times 3 \times 10^{8}}{580 \times 10^{-9}} J$
$=\frac{6.6 \times 10^{-34} \times 3 \times 10^{8}}{580 \times 10^{-9} \times 1.6 \times 10^{-19}} eV =2.1 \,eV$