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← ScienceWhich risk increases when gallium arsenide has lattice defects?
A)Auger recombination suppresses light emission✓
B)Increased piezoelectric behavior under stress
C)Ferromagnetic domains spontaneously start aligning
D)Thermal conductivity becomes size quantized
💡 Explanation
Lattice defects introduce energy states within the band gap, providing pathways for non-radiative recombination. This occurs due to Auger recombination, because excited electrons lose energy to other electrons, rather than emitting photons; therefore luminescence diminishes with more defects, rather than other band structure effects.
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