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â ScienceWhich outcome results when excessive doping narrows semiconductor band gaps?
A)Increased reverse bias leakage currentâ
B)Improved radiative recombination lifetime
C)Higher thermal conductivity coefficient
D)Reduced piezoelectric charge generation
đĄ Explanation
Increased doping causes band gap narrowing, which lowers the barrier for minority carriers to cross the junction due to increased tunneling via Zener breakdown; therefore, increased leakage becomes more prevalent, rather than improved recombination or altered thermal/piezoelectric properties occurring.
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