Zhang Xin, Eurelings Stijn, Bracesco Andrea, Song Wenya, Lenaers Stijn, Van Gompel Wouter, Krishna Anurag, Aernouts Tom, Lutsen Laurence, Vanderzande Dirk, Creatore Mariadriana, Zhan Yiqiang, Kuang Yinghuan, Poortmans Jef
Center for Micro Nano Systems, School of Information Science and Technology (SIST), Fudan University, Handan 220, Shanghai 200433, China.
Academy for Engineering & Technology (FAET), Fudan University, Handan 220, Shanghai 200433, China.
ACS Appl Mater Interfaces. 2023 Oct 11;15(40):46803-46811. doi: 10.1021/acsami.3c08119. Epub 2023 Sep 27.
The metal halide perovskite absorbers are prone to surface defects, which severely limit the power conversion efficiencies (PCEs) and the operational stability of the perovskite solar cells (PSCs). Herein, trace amounts of bithiophene propylammonium iodide (bi-TPAI) are applied to modulate the surface properties of the gas-quenched perovskite. It is found that the bi-TPAI surface treatment has negligible impact on the perovskite morphology, but it can induce a defect passivation effect and facilitate the charge carrier extraction, contributing to the gain in the open-circuit voltage () and fill factor. As a result, the PCE of the gas-quenched sputtered NiO-based inverted PSCs is enhanced from the initial 20.0% to 22.0%. Most importantly, the bi-TPAI treatment can largely alleviate or even eliminate the burn-in process during the maximum power point tracking measurement, improving the operational stability of the devices.
金属卤化物钙钛矿吸收层容易出现表面缺陷，这严重限制了钙钛矿太阳能电池（PSC）的功率转换效率（PCE）和运行稳定性。在此，应用痕量的二噻吩丙基碘化铵（bi-TPAI）来调节气相猝灭钙钛矿的表面性质。研究发现，bi-TPAI表面处理对钙钛矿的形貌影响可忽略不计，但它能诱导缺陷钝化效应并促进电荷载流子提取，有助于开路电压（）和填充因子的提高。结果，气相猝灭溅射NiO基倒置PSC的PCE从最初的20.0%提高到了22.0%。最重要的是，bi-TPAI处理可在很大程度上减轻甚至消除最大功率点跟踪测量期间的老化过程，提高器件的运行稳定性。
