Question

The compound semiconductor used for making LEDs of different colours is

• A. Scandium Arsenide - Phosphide
• B. Indium Arsenide - Phosphide
• C. Indium Arsenide - Selenide
• D. Gallium Arsenide - Selenide
• E. Gallium Arsenide - Phosphide

Answer 1

Answer: (E)

The compound semiconductor used for making LEDs (Light Emitting Diodes) of different colors typically involves materials that can emit light efficiently when electrically excited.

Among the given options, the common semiconductors used for producing LEDs of various colors are:

• Gallium Arsenide - Phosphide (GaAsP): Used for red, orange, and yellow LEDs.
• Indium Gallium Nitride (InGaN) and Gallium Phosphide (GaP): Typically used for blue, green, and white LEDs.
• Gallium Arsenide - Selenide: This is not typically used for LEDs.
• Scandium Arsenide - Phosphide: This is not a common compound semiconductor used for making LEDs.

The correct compound semiconductor used for making LEDs of different colors is **Gallium Arsenide - Phosphide** (GaAsP), which is widely used for producing red and orange LEDs.

Correct Answer:

Correct Answer: (E) Gallium Arsenide - Phosphide