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← ScienceWhich doping outcome occurs when excessive annealing affects semiconductors?
A)Carrier freeze-out at grain boundaries
B)Increased band tailing reducing mobility✓
C)Creation of deep level traps
D)Polycrystalline domain enlargement ensues rapidly
💡 Explanation
Annealing can redistribute dopants, causing band modifications because dopant diffusion into grain boundaries result in increased band tailing. Therefore, reduced carrier mobility is observed, rather than carrier freeze-out confined grain depletion regions.
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