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← ScienceWhich mechanism fundamentally limits photodiode quantum efficiency when detecting photons?
A)Recombination lowers free carrier generation✓
B)Trapping reduces electron momentum transfer
C)Reflection increases photon path length
D)Tunneling enables electron bypass regions
💡 Explanation
Recombination limits efficiency because electron-hole pairs recombine, reducing measurable current, rather than contributing; Shockley-Read-Hall recombination dominates because defects in semiconductors promote electron capture, therefore lowering quantium efficiency compared to alternative carriers' processes.
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