Multiple choice general knowledge science & technology

Which material is used for construction of LED

  1. Ge

  2. Si

  3. Both a and b

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

LEDs are typically constructed from gallium-based compound semiconductors like GaAs, GaP, or GaN, not from elemental semiconductors like Germanium (Ge) or Silicon (Si). These III-V compound materials have direct bandgaps that allow efficient light emission through electroluminescence, which Ge and Si cannot provide effectively.

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