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This is a Experimental Study study.

Regulated Aggregation of Phenyl-C61-Butyric Acid Methyl Ester (PCBM) Electron-Transporting Layer via Solvent Engineering for Performance Improvement in Perovskite Solar Cells

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This study demonstrates improved power conversion efficiency in perovskite solar cells, suggesting enhanced charge extraction.

Achieving a power conversion efficiency of 23.22% highlights significant advancements in solar cell performance.
The introduction of 2-chlorothiophene regulates PCBM aggregation, enhancing molecular dispersion and reducing charge recombination.
Optimized PCBM morphology not only improves electrostatic interactions but also boosts the operational stability of solar cells.
Solvent engineering techniques can effectively modify electron transport layers to achieve better overall device efficiency.

Chen et al. (2025) studied this question.

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