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This study systematically screened organic passivation layers to reduce defects in triple-cation triple-halide perovskite solar cells, which combine cesium, formamidinium, and methylammonium cations with iodide, bromide, and chloride halides. The researchers identified optimal passivation molecules that effectively minimize surface defects and trap states at the perovskite interface. These improvements enabled the solar cells to achieve power conversion efficiencies exceeding 23% while eliminating the problematic hysteresis effect that typically causes discrepancies between forward and reverse voltage scans.
Why it matters
The elimination of hysteresis is critical for accurate performance assessment and commercial reliability of perovskite solar cells. This screening approach provides a systematic method for optimizing perovskite device performance and brings these third-generation photovoltaics closer to commercial viability as a cost-effective alternative to silicon-based solar panels.
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