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← ScienceWhich outcome arises when excessive impurities disrupt perovskite lattice?
A)Decreased power conversion efficiency✓
B)Enhanced electron-hole recombination
C)Increased charge carrier lifetime
D)Improved overall film crystallinity
💡 Explanation
Decreased power conversion efficiency occurs because high impurity levels cause increased scattering; therefore carrier mobility decreases, rather than increasing lifetime, because the scattering disrupts electron transport.
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