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← ScienceWhich consequence results when halide perovskite solar cells degrade?
A)Reduced open-circuit voltage occurs✓
B)Increased short-circuit current occurs
C)Increased fill factor is achieved
D)Stabilized power conversion efficiency
💡 Explanation
Degradation causes ion migration leading to defects, and the open-circuit voltage falls because these defects increase recombination rates, reducing charge carrier lifetime--a process of ionic conduction. Therefore, voltage drops, rather than current increasing, because fewer excited electrons reach the contacts.
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