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← ScienceWhich outcome occurs when a photodiode's depletion region narrows?
A)Decreased electron-hole recombination rate✓
B)Increased minority carrier diffusion
C)Reduced thermal noise generation
D)Enhanced built-in potential strength
💡 Explanation
Decreased depletion region width reduces the space for electron-hole recombination because Shockley-Read-Hall recombination is directly proportional to said width, therefore reducing light sensitivity rather than other effects related to carrier movement because those factors do not alter the electron lifetime so dramatically.
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