Question

A p-n junction is fabricated from a semiconductor with band gap of 2.8eV. Can it detect a wavelength of 6000nm?

Answer 1

Explanation:

A p-n photodiode is fabricated from a semiconductor with band gap of 2.8 eV. Can it detect a wavelength of 6000 nm? The energy of a signal of wavelength 6000 nm is 0.207 eV, which is less than 2.8 eV − the energy band gap of a photodiode. Hence, the photodiode cannot detect the signa

Hope it helps u