Main Unit of Instrument comprises of regulated power supply, two analog meters for voltage & current measurement, photodiode is enclosed in a box and light source with intensity control knob , terminals are provided on front panel to make connection externally with the help of connecting leads. Complete in all respects.
Experimental Objective
To study the V-I characteristics of a photodiode under different light intensities
Theory
A photodiode is a semiconductor device that converts light energy into electrical current. It is designed to operate in reverse bias and exhibits properties that make it suitable for light detection applications.
Working Principle
Photodiodes operate based on the photoelectric effect, where photons with energy greater than or equal to the band gap of the semiconductor material generate electron-hole pairs when they strike the device. These carriers are then separated by the built-in electric field in the depletion region, creating a photocurrent.
