Wu Wei, Han Wenbin, Deng Yanyu, Ren Guanhua, Liu Chunyu, Guo Wenbin
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China.
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China.
J Colloid Interface Sci. 2022 Jul;617:745-751. doi: 10.1016/j.jcis.2022.03.059. Epub 2022 Mar 16.
Matched energy level alignment and minimal non-radiative recombination at the buried perovskite/charge transport material interface are essential for efficient electron transfer and highly-efficient perovskite solar cells (PSCs). Herein, we develop a facile and feasible method by inserting Cesium(I) Bis(trifluoromethanesulfonyl)imide (CsTFSI) interlayer to fabricate high performance PSCs with negligible hysteresis. With CsTFSI modification, tin oxide displays less trap density, improved electrical conductivity and better energy level alignment with perovskite, leading to a considerable increase in power conversion efficiency (PCE). Consequently, the champion target device presents a PCE of 22.05%, much higher than that of the control device (19.93%). Our work provides an effective and simple strategy for the modification of perovskite buried interface to obtain highly efficient PSCs.
在掩埋的钙钛矿/电荷传输材料界面处实现匹配的能级对齐和最小化的非辐射复合，对于高效电子转移和高效钙钛矿太阳能电池（PSC）至关重要。在此，我们通过插入双（三氟甲磺酰）亚胺铯（CsTFSI）中间层开发了一种简便可行的方法，以制造具有可忽略滞后现象的高性能PSC。通过CsTFSI修饰，氧化锡显示出更低的陷阱密度、更高的电导率以及与钙钛矿更好的能级对齐，从而使功率转换效率（PCE）显著提高。因此，最佳目标器件的PCE为22.05%，远高于对照器件（19.93%）。我们的工作为修饰钙钛矿掩埋界面以获得高效PSC提供了一种有效且简单的策略。
