Photodiode working

A photodiode is a semiconductor device with a p-n junction converts light into current. When the light is incident upon it, the photons are absorbed which results in the generation of current. The amount of current produced depends on the intensity of incident light.

It is important to note that a small amount of current is also produced even when no light is present. Since, larger the surface area, higher the amount of current produced so, the surface area of the photodiode is made larger. A photodiode is designed to operate in reverse bias. The structure of a p-n photodiode is quite simple. It consists of a very thin wafer of anti-reflective (AR), coating of selenium or silicon (0.002 to 0.006thick).

This wafer emits electrons when it is subjected to light rays. A silver wafer acting as anode is also placed in the device to collect the electrons. The symbol of p-n photodiode and its constructional view are shown below. So these are photodiode working. Here some application given below of photodiode.

After knowing about the photodiode working we need to know about the application of photodiode. So these are some photodiode.

A Photo diode is used in some electronics equipment’s developed in different fields.

1. It is used in some consumer electronic devices such as CD players, bar code scanners, brightness control etc.

2. It is used in safety equipment’s such as smoke detectors, flame monitors, etc.

3. It is used in communications such as in fiber optic links. Optical communications, optical remote control

4. It is also used in medical equipment’s such as in CAT (computed axial tomography) scanners for X-ray detection, blood practice analyzers, etc.

5. It may also be used to change the state of circuitry.

Hence it is the photodiode working and application. If you will find any incorrect above please comment below.

If you want to know more about the photodiode working you must watch this video.