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Which bonding change reduces the conductivity of doped silicon?

A)Hydrogen passivation of boron acceptors
B)Phosphorus interstitial diffusion acceleration
C)Increased silicon lattice phonon scattering
D)Boron clustering induced carrier depletion

💡 Explanation

Hydrogen passivation occurs because monatomic hydrogen bonds to boron, neutralizing its acceptor attributes; therefore, conductivity decreases, rather than increasing it, because the number of free holes is reduced relative to the initial doping level.

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