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Which outcome results when a semiconductor at cryogenic temperatures contains impurities increasing mid-band energy states?

A)Decreased electron-hole pair recombination time
B)Increased crystal lattice vibrational stability
C)Enhanced intrinsic carrier concentration level
D)Suppressed thermally activated charge carriers

💡 Explanation

Increased impurities create energy levels within the Semiconductor band gap, boosting electron-hole recombination. Therefore, recombination time decreases, because electrons become accessible, rather than stable crystal vibration where the structure is unaffected.

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