Question

The material used in the fabrication of infrared LED's is

• A. Silicon
• B. Germanium
• C. Gallium arsenide phosphide
• D. Carbon dioxide

Hint:

Gallium arsenide phosphide (GaAsP) is frequently used for producing infrared LEDs, especially in applications like remote controls and optical communication.

Answer 1

The Correct Option is C

Infrared LEDs (Light Emitting Diodes) are typically made from materials that can emit infrared light when excited electrically. The material commonly used for infrared LEDs is Gallium arsenide phosphide (GaAsP), which has the appropriate band gap for infrared emission.

Answer 2

Step 1: Understanding Infrared LEDs
Infrared LEDs emit light in the infrared region of the electromagnetic spectrum, which is invisible to the human eye.

Step 2: Material properties required
The material used must have a suitable band gap to emit infrared light efficiently.

Step 3: Common materials used
Gallium arsenide phosphide (GaAsP) is widely used because it has an appropriate band gap for infrared emission.

Step 4: Conclusion
Hence, Gallium arsenide phosphide is the material used in the fabrication of infrared LEDs.