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← ScienceWhich consequence results when nitrogen vacancies increase within a gallium nitride semiconductor?
A)Decreased band gap and conductivity✓
B)Increased piezoelectricity and vibration
C)Enhanced thermal runaway robustness
D)Improved etching efficacy and fidelity
💡 Explanation
Defects influence GaN electronic properties; increased nitrogen vacancies create donor levels via **nitrogen vacancy formation**, reducing the band gap and enhancing n-type conductivity because electrons require less energy to move to the conduction band, therefore enhancing conductivity, rather than inducing other piezoelectric or thermal effects.
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