Publication date: 15th December 2025
Perovskite solar cells (PSCs) have attracted intensive attention due to the high power conversion efficiency and solution-based fabrication process. To assemble efficient PSCs, we have designed and synthesized various additives including both small molecules and polymers to tune the properties of the perovskite layer and charge transport layers. For the latest results, we have fabricated PSCs with efficiencies exceeding 27.3% by constructing 2D perovskites at the buried interface, while simultaneously passivating defects in the bulk and on the surface of the 3D perovskite layer. For stability, we have investigated the ion migration/diffusion phenomenon within the perovskite films and across interfaces, and developed techniques to suppress the undesired ion movement. Furthermore, we extend the application of PSCs to flexible formats using low-temperature, vapor-assisted deposition on polymer substrates. This approach enables the successful fabrication of 30 × 30 cm2 flexible PSC modules, where interface engineering significantly improves both photovoltaic performance and operational stability.
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