近日，复旦大学梁佳团队研究了具有均匀埋藏界面的锡基钙钛矿太阳能电池。该项研究成果发表在2025年10月15日出版的《自然》杂志上。

锡基钙钛矿太阳能电池（TPSCs）作为一种前景广阔的无毒环保型铅基器件替代方案，其倒置架构的认证功率转换效率目前已突破16%。尽管具有支持理论效率超过33%的理想带隙，锡基钙钛矿电池在性能和稳定性方面仍存在不足，部分原因在于空穴传输层性能欠佳及埋底界面缺陷导致空穴提取受阻。

研究组通过在埋底界面引入(E)-(2-(4',5'-双(4-(双(4-甲氧基苯基)氨基)苯基)-[2,2'-联噻吩]-5-基)-1-氰乙烯基)膦酸分子薄膜，优化了倒置结构锡基钙钛矿电池的空穴传输层。该分子膜可形成能级匹配的均匀界面层，显著提升空穴提取效率。此外，这种策略还构建出超浸润底层，引导生长出缺陷密度降低、非辐射复合损失减少的高质量均匀锡基钙钛矿薄膜。

最终制备的倒置结构小面积锡基钙钛矿电池实现了17.89%的创纪录转换效率（反向扫描模式认证效率达17.71%）。封装器件在环境储存1344小时后仍保持初始效率95%以上，在1倍太阳光照射下连续运行1550小时后效率保持率超过94%。值得注意的是，研究组实现了1cm²电池14.40%的破纪录效率，充分证明了该策略的可扩展性。

附：英文原文

Title: Tin-based perovskite solar cells with a homogeneous buried interface

Author: Li, Tianpeng, Luo, Xin, Wang, Peilin, Li, Zhi, Li, Yimeng, Huang, Jinhai, Jin, Zuoming, Yang, Yingguo, Li, Bin, Zhang, Wenqi, Lin, Siyuan, Rui, Yichuan, Wang, Hua, Zhang, Qinghong, Zhan, Yiqiang, Xu, Bo, Liang, Jia, Qi, Yabing

Issue&Volume: 2025-10-15

Abstract: Tin-based perovskite solar cells (TPSCs) have emerged as a promising non-toxic and environmentally friendly alternative to lead-based devices1-3, with certified power conversion efficiencies (PCEs) of inverted architectures now exceeding 16%4-8. Despite an ideal bandgap supporting a theoretical PCE over 33%, TPSCs still lag in performance and stability, partly due to suboptimal hole transport layers and poor buried interface that hinder hole extraction. Here, we report (E)-(2-(4',5'-bis(4-(bis(4-methoxyphenyl)amino)phenyl)-[2,2'-bithiophen]-5-yl)-1-cyanovinyl)phosphonic acid at the buried interface, using a molecular film to optimize hole transport layers in inverted TPSCs. This molecular film forms a homogeneous interfacial layer with well-matched energy level alignment, significantly enhancing hole extraction. Moreover, this approach creates a superwetting underlayer that guides the growth of uniform, high-quality Sn-based perovskite films with reduced defect density and minimized non-radiative recombination losses. The resulting inverted small-area TPSCs demonstrate a record PCE of 17.89% (certified 17.71% under reverse scanning mode). Furthermore, the encapsulated device maintains over 95% of the initial PCE after 1344 h of ambient shelf storage and over 94% after 1550 h of continuous operation under 1-sun illumination. Notably, we achieve a record PCE of 14.40% for 1 cm2 TPSCs, highlighting the scalability of our strategy.

DOI: 10.1038/s41586-025-09724-2

Source: https://www.nature.com/articles/s41586-025-09724-2