Chen Hao, Liu Cheng, Xu Jian, Maxwell Aidan, Zhou Wei, Yang Yi, Zhou Qilin, Bati Abdulaziz S R, Wan Haoyue, Wang Zaiwei, Zeng Lewei, Wang Junke, Serles Peter, Liu Yuan, Teale Sam, Liu Yanjiang, Saidaminov Makhsud I, Li Muzhi, Rolston Nicholas, Hoogland Sjoerd, Filleter Tobin, Kanatzidis Mercouri G, Chen Bin, Ning Zhijun, Sargent Edward H
Department of Chemistry, Northwestern University, Evanston, IL 60208, USA.
Department of Electrical and Computer Engineering, University of Toronto, Toronto, ON M5S 1A4, Canada.
Science. 2024 Apr 12;384(6692):189-193. doi: 10.1126/science.adm9474. Epub 2024 Apr 11.
Inverted (pin) perovskite solar cells (PSCs) afford improved operating stability in comparison to their nip counterparts but have lagged in power conversion efficiency (PCE). The energetic losses responsible for this PCE deficit in pin PSCs occur primarily at the interfaces between the perovskite and the charge-transport layers. Additive and surface treatments that use passivating ligands usually bind to a single active binding site: This dense packing of electrically resistive passivants perpendicular to the surface may limit the fill factor in pin PSCs. We identified ligands that bind two neighboring lead(II) ion (Pb) defect sites in a planar ligand orientation on the perovskite. We fabricated pin PSCs and report a certified quasi-steady state PCE of 26.15 and 24.74% for 0.05- and 1.04-square centimeter illuminated areas, respectively. The devices retain 95% of their initial PCE after 1200 hours of continuous 1 sun maximum power point operation at 65°C.
倒置（针状）钙钛矿太阳能电池（PSC）与其n-i-p对应物相比，具有更高的运行稳定性，但在功率转换效率（PCE）方面却落后。导致针状PSC中这种PCE不足的能量损失主要发生在钙钛矿与电荷传输层之间的界面处。使用钝化配体的添加剂和表面处理通常会结合到单个活性结合位点：这种垂直于表面的电阻性钝化剂的密集堆积可能会限制针状PSC的填充因子。我们确定了在钙钛矿上以平面配体取向结合两个相邻铅（II）离子（Pb）缺陷位点的配体。我们制备了针状PSC，并报告了在0.05平方厘米和1.04平方厘米光照面积下，经认证的准稳态PCE分别为26.15%和24.74%。在65°C下连续1个太阳最大功率点运行1200小时后，这些器件保留了其初始PCE的95%。
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