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Which mechanism limits electron mobility in semiconducting crystal lattices at high temperatures?

A)Increased phonon scattering
B)Reduced electron-hole recombination
C)Enhanced quantum tunneling
D)Decreased band gap energy

💡 Explanation

Increased temperatures cause more lattice vibrations (phonons); therefore, increased phonon scattering impedes electron flow, reducing mobility, because electrons collide more frequently with these vibrations, rather than purely thermal excitation.

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