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← ScienceIn 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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