The diffusion potential across a p-n junction—

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The diffusion potential across a p-n junction—

1. Decreases with increasing doping concentration
2. Increases with decreasing band gap
3. Does not depend on doping concentration
4. Increases with increasing doping concentration

Correct Option: D

We know that the diffusion or junction potential is given as

V_T =		kF	l_n		N_AN_D
		q			n_i ²

or V_T ∝ doping concentration
Hence alternative (D) is the correct answer.