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In a heavily doped semiconductor photodiode, which outcome arises when the reverse bias exceeds the semiconductor band gap?

A)Increased Zener breakdown probability
B)Reduced thermal noise generation
C)Increased minority carrier lifetime
D)Reduced depletion region width

💡 Explanation

Increased Zener breakdown probability results because exceeding it will permit significant tunneling current via the Zener Effect, therefore causing the diode to conduct in reverse. It favors electronic band-to-band tunneling, rather than other mechanisms or conductivity behaviors under normal bias.

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