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← ScienceWhich risk increases when doping disrupts silicon crystal periodicity?
A)Increased likelihood of electron tunneling✓
B)Increased width of the conduction band
C)Decreased band gap energy magnitude
D)Decreased probability of phonon scattering
💡 Explanation
Dopants cause lattice defects that alter effective potential barriers; this causes increased *electron tunneling* through the altered wavefunctions of overlapping orbitals because the barriers are thinner and more frequent, therefore tunneling increases, rather than band gap or phonon effects.
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