LED works on which of the following principles ?

Question

Question

This question was previously asked in

DFCCIL Executive Electrical 30 Sept 2021 Official Paper

It works on the principle of electro luminance.
LED is designed to experience breakdown at a specified reverse bias voltage.
LED is basically like an ordinary PN-junction diode but normally operated in reverse biased condition.
When a photon of ample energy strikes the diode, it makes a couple of electron-holes

Answer 1

The correct answer is Electro luminance.

Key Points

Light Emitting Diode (LED) works on the Principle of Electro luminance.
Light Emitting Diode:
- It is a semiconductor device.
- They emit light when an electric current passes through them.
- LED lights are ideal for numerous applications including night lighting, art lighting, and outdoor lighting.
Electroluminescence:
- It is the non-thermal conversion of electrical energy into light energy.
- It is an optical process that leads to the generation of photons as a result of the radiative recombination of holes and electrons during the passage of an electric current through a material.
LEDs work on the principle of Electroluminescence.
On passing a current through the diode, minority charge carriers and majority charge carriers recombine at the junction. On recombination, energy is released in the form of photons.