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← ScienceWhich outcome occurs when high voltage forms defects in perovskite solar cells?
A)Increased ion migration and device degradation✓
B)Enhanced light absorption and power generation
C)Improved electron mobility, reduced resistance
D)Decreased material density; thermal expansion
💡 Explanation
High voltage induces the Frenkel defect mechanism where ions move, hence increasing ion migration and cell degradation, because vacancies promote diffusion. Therefore, lifetime decreases; rather than improving performance as in options B/C.
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