In addition to emitting light, an LED can be used as a photodiode light sensor / detector. ... As a photodiode, an LED is sensitive to wavelengths equal to or shorter than the predominant wavelength it emits. A green LED would be sensitive to blue light and to some green light, but not to yellow or red light.
What is difference LED and photodiode?
LED generates light with the help of charge carriers while photodiode generates current due to incident photons. In a nutshell, LED converts electric energy into light energy but Photodiode converts light energy into electrical energy.
What are the three types of photodiode?
What are the different types of Photodiodes?
- PN photodiode: The first photodiode to be developed was PN photodiode. ...
- PIN photodiode: These days PIN photodiode finds wide applications. ...
- Avalanche photodiode: Avalanche process is used for providing extra performances.
