COMEDK · Physics · 30. Semiconductors
Choose the incorrect statements.
- A Silicon is used in the fabrication of LED.
- B LED works on the principle of electróluminescence.
- C LED is a power efficient device.
- D LED is fabricated with direct band gap semiconductor.
Answer & Solution
Correct Answer
(A) Silicon is used in the fabrication of LED.
Step-by-step Solution
Detailed explanation
LEDs are fabricated using direct band gap semiconductors such as Gallium Arsenide (GaAs) or Gallium Phosphide (GaP) because they allow for efficient radiative recombination of electrons and holes. Silicon is an indirect band gap semiconductor, which makes it highly inefficient…
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