Describe the construction of a photodiode with appropriate diagram. Wh

Question

Describe the construction of a photodiode with appropriate diagram. What is the minimum frequency (in Hertz) of the photons detectable by a photodiode made of a semiconductor with 2.5 eV bandgap?

19 Jan 2026

Answer :

Word Count : 286

A photodiode is a semiconductor optoelectronic device that converts incident light into an electrical signal. It is typically fabricated using a p–n junction or a p–i–n structure made from materials such as silicon, germanium, or gallium arsenide. In construction, a thin p-type layer is formed on an _____ _______ ____ ______ _________ __________ _______ ___ _______ _________.
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