Wen Yehui, Zhang Tianchi, Wang Xingtao, Liu Tiantian, Wang Yu, Zhang Rui, Kan Miao, Wan Li, Ning Weihua, Wang Yong, Yang Deren
State Key Laboratory of Silicon and Advanced Semiconductor Materials and School of Materials Science and Engineering, Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou, Zhejiang, P. R. China.
Institute of Functional Nano & Soft Materials, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, P. R. China.
Nat Commun. 2024 Aug 17;15(1):7085. doi: 10.1038/s41467-024-51551-y.
Passivation materials play a crucial role in a wide range of high-efficiency, high-stability photovoltaic applications based on crystalline silicon and state-of-the-art perovskite materials. Currently, for perovskite photovoltaic, the mainstream passivation strategies routinely rely on crystalline materials. Herein, we have invented a new amorphous (lysine)PbI layer-enhanced halide perovskite. By utilizing a solid phase reaction between PbI and lysine molecule, an amorphous (lysine)PbI layer is formed at surface/grain boundaries in the perovskite films. The amorphous (lysine)PbI with fewer dangling bonds can effectively neutralize surface/interface defects, achieving an impressive efficiency of 26.27% (certified 25.94%). Moreover, this amorphous layer not only reduces crystal lattice stress but also functions as a barrier against the decomposition of organic components, leading to suppressed de-structuring of perovskite and highly stable perovskite solar cells.
钝化材料在基于晶体硅和最先进的钙钛矿材料的广泛高效、高稳定性光伏应用中起着至关重要的作用。目前，对于钙钛矿光伏，主流的钝化策略通常依赖于晶体材料。在此，我们发明了一种新型的非晶（赖氨酸）PbI层增强卤化物钙钛矿。通过利用PbI与赖氨酸分子之间的固相反应，在钙钛矿薄膜的表面/晶界处形成非晶（赖氨酸）PbI层。具有较少悬空键的非晶（赖氨酸）PbI可以有效中和表面/界面缺陷，实现了令人印象深刻的26.27%的效率（认证效率为25.94%）。此外，这种非晶层不仅降低了晶格应力，还起到了防止有机成分分解的屏障作用，导致钙钛矿的解构受到抑制，以及钙钛矿太阳能电池具有高度稳定性。
