Overcoming the Stability Issue for Hydrophobic Hole Transporting Layers Utilized in Tin‐Lead Perovskite and Tandem Solar Cells

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A record power conversion efficiency of 22.67% is achieved using a non-annealing method with PTAA.
Incorporation of SnF2 enhances the dispersion and bonding, improving the quality of PTAA films.
This research demonstrates significant efficiency improvements for PTAA-based all-perovskite tandem solar cells.
Utilizing the novel method leads to excellent stability, maintaining 96% efficiency after 500 hours under simulated conditions.

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Non-annealing method improves film coverage in tandem solar cells, resulting in efficiency gains.

Kuan et al. (2025) studied this question.

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