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← ScienceWhich 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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