Questions
A p-n photodiode is made of a material with a band gap of 2.0 eV. The minimum frequency of the radiation that can be absorbed by the material is nearly
a
10×1014 Hz
b
5×1014 Hz
c
1×1014 Hz
d
20×1014 Hz
detailed solution
Correct option is B
p -n photodiode is a semiconductor diode that produces a significant current when illuminated. It is reversed biased but is operated below the breakdown voltage. Energy of radiation = Band gap energy That is hv = 2.0 eVor v=2.0×1.6×10-196.6×10-34≈5×1014HzTalk to our academic expert!
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