Which mechanism causes increased opacity within polycrystalline silicon when grain boundaries increase?

A)Increased electron scattering at grain boundaries✓

B)Reduced phonon mean free path

C)Increased radiative recombination rate

D)Augmented secondary electron emission

💡 Explanation

Electron scattering at grain boundaries increases opacity because boundary imperfections create more scattering sites impacting electron movement; therefore, light absorption increases, rather than being related to phonon effects or recombination at defects.

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Which mechanism causes increased opacity within polycrystalline silicon when grain boundaries increase?

💡 Explanation

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