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← ScienceWhich outcome occurs when dislocations impede grain boundary diffusion in a polycrystalline silicon crystal?
A)Increased material fracture toughness
B)Enhanced surface passivation quality
C)Reduced photovoltaic cell efficiency✓
D)Improved thermoelectric conversion factor
💡 Explanation
Reduced photovoltaic cell efficiency occurs because grain boundary diffusion facilitates dopant distribution essential for optimal charge separation, therefore reduced diffusion leads to suboptimal functioning, rather than affecting toughness or thermoelectric properties. Pinning happens due to dislocation entanglement.
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