NEET Physics Question - Semiconductor Physics - P-N Junction Diode and its applications

Assertion (A): In LED \(e^-\)-hole pair recombination gives us photon.

Reason (R): In LED \(e^-\)-hole pair recombination occurs in depletion region.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

Assertion (A) is true; LEDs emit photons when electrons and holes recombine. Reason (R) is false; while carriers cross the depletion region, significant recombination leading to light emission primarily occurs in the quasi-neutral regions (or active layer) under forward bias, not mainly within the depletion region itself.

Rankers Physics

LED Photon Emission

Solution:

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