Zong Beibei, Sun Qing, Deng Jianguo, Meng Xiangxin, Zhang Zizhao, Kang Bonan, Ravi P Silva S, Lu Geyu
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
J Colloid Interface Sci. 2022 May 15;614:415-424. doi: 10.1016/j.jcis.2022.01.133. Epub 2022 Jan 25.
The performance of perovskite solar cells (PSCs) can be improved by optimizing the perovskite film quality and electron transfer layers (ETLs). In this study, high-efficient PSCs with multi-cation hybrid electron transport layer (SnO@Na:Cs ETL) were fabricated using continuous spin-coating. Compared to the pristine SnO, the power conversion efficiency (PCE) of device based on SnO@Na:Cs ETL have reached 22.06% (with an open circuit voltage of 1.13 V), up approximately 21%. The photovoltaic performance of the device is enhanced due to the increase in the transmission rate, electrical conductivity, electron mobility and surface state owing to the multi-cation hybrid. In addition, because SnO@Na:Cs ETL can significantly improve interface contact with the perovskite film and improve its crystallinity, the transport defect state and carrier transport efficiency are significantly improved at the ETL/Perovskite interface. Therefore, the open circuit voltage (V) and fill factor (FF) of PSCs was significantly increased. The application of SnO@Na:Cs ETL provides a simple and efficient method to obtain highly-efficient PSCs.
通过优化钙钛矿薄膜质量和电子传输层（ETL），可以提高钙钛矿太阳能电池（PSC）的性能。在本研究中，采用连续旋涂法制备了具有多阳离子混合电子传输层（SnO@Na:Cs ETL）的高效PSC。与原始的SnO相比，基于SnO@Na:Cs ETL的器件的功率转换效率（PCE）达到了22.06%（开路电压为1.13 V），提高了约21%。由于多阳离子混合导致传输速率、电导率、电子迁移率和表面状态的增加，器件的光伏性能得到增强。此外，由于SnO@Na:Cs ETL可以显著改善与钙钛矿薄膜的界面接触并提高其结晶度，在ETL/钙钛矿界面处的传输缺陷态和载流子传输效率得到显著改善。因此，PSC的开路电压（V）和填充因子（FF）显著提高。SnO@Na:Cs ETL的应用提供了一种简单有效的方法来获得高效PSC。
