Which of the following elements is NOT suitable for the fabrication of a light emitting diode struct...........

General Studies (CGL) General Science

Which of the following elements is NOT suitable for the fabrication of a light emitting diode structure?

This questions was previously asked in

SSC CGL 12th April 2022 Shift-2

Gallium phosphide

Indium gallium nitride

Germanium

Gallium arsenide

- Gallium phosphide (Option 1): Commonly used in LEDs, especially in green and yellow colors.

- Indium gallium nitride (Option 2): Essential for high-brightness blue and white LEDs.

- Germanium (Option 3): ? Not suitable for LED fabrication because it is an indirect bandgap semiconductor, making it inefficient at emitting light.

- Gallium arsenide (Option 4): Used for infrared and red LEDs.

Correct Answer: Option 3 - Germanium

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