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Which outcome impairs gallium arsenide crystal performance operating near 150°C?

A)Increased intrinsic carrier concentration
B)Reduced piezoelectric polarization
C)Increased electron-phonon scattering
D)Reduced impurity ionization energy

💡 Explanation

Elevated temperature causes increased intrinsic carrier concentration due to thermal excitation, creating equal electron-hole pairs exceeding dopant density. Therefore, conductivity deviates from designed values and reduces device efficiency, rather than alternative polarization or scattering impacts which are secondary effects.

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