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← ScienceWhich mechanism widens the depletion region in reverse-biased PIN diodes?
A)Band bending increases the barrier✓
B)Increased temperature creates more free carriers.
C)Minority carriers accumulate near junctions.
D)Forward bias reduces tunneling resistance.
💡 Explanation
Band bending increases the barrier because applied reverse voltage causes the FermLevel to shift; therefore electrons require more energy to overcome the potential, rather than temperature or minority carrier effects creating conductivity.
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