Question

Which process of the Electron-hole pair is responsible for emitting of light?

• A. Gradient
• B. Drift
• C. Recombination
• D. Diffusion

Hint:

In optoelectronics, light is emitted due to the recombination of electron-hole pairs, a fundamental principle in devices like LEDs.

Answer 1

The Correct Option is C

In semiconductors, light emission occurs when an electron recombines with a hole, releasing energy in the form of light. This process is known as **recombination**. When an electron from the conduction band falls into a hole in the valence band, energy is released as a photon, which is the principle behind light emission in light-emitting diodes (LEDs).
Thus, the correct answer is option (3).