Liu Dixin, Zhang Wenyuan, Ren Ziqiu, Li Xin
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology 150001 Harbin China
Henan Institute of Advanced Technology, Zhengzhou University Zhengzhou 450052 P. R. China
RSC Adv. 2022 May 16;12(23):14631-14638. doi: 10.1039/d2ra01297a. eCollection 2022 May 12.
To date, most preparation processes of polycrystalline perovskite films still have to be performed in a glovebox filled with inert gas, limiting the application due to their high cost and complexity. In this work, we exploit a facile processing technique for the preparation of perovskite solar cells (PSCs) under ambient conditions by the Yb doping effect for SnO electron transfer layer. This remarkable and facile interface doping strategy promotes all-air processed planar PSCs, giving enhanced power conversion efficiency (PCE) from 15.69% to 17.31% with a decreasing hysteresis effect. Moreover, the heating and illumination stability of modified devices by virtue of defect suppression located at electron transfer layer (ETL)/perovskite interface has been effectively improved, retaining over 85% of its initial PCE after 7 h heating at 100 °C in ambient condition and 85% of its initial PCE under 7 h continuous light illumination without any encapsulation. Therefore, it is believed that this Yb-doping strategy for SnO ETL can provide a novel way of promoting the efficiency and stability of devices prepared in the air.
迄今为止，多晶钙钛矿薄膜的大多数制备过程仍需在充满惰性气体的手套箱中进行，由于成本高且复杂，限制了其应用。在这项工作中，我们利用一种简便的加工技术，通过对SnO电子传输层的Yb掺杂效应，在环境条件下制备钙钛矿太阳能电池（PSC）。这种显著且简便的界面掺杂策略促进了全空气处理的平面PSC，使功率转换效率（PCE）从15.69%提高到17.31%，同时滞后效应减小。此外，通过抑制位于电子传输层（ETL）/钙钛矿界面的缺陷，有效提高了改性器件的加热和光照稳定性，在环境条件下100℃加热7小时后，其初始PCE保留超过85%，在7小时连续光照且无任何封装的情况下，其初始PCE保留85%。因此，人们认为这种用于SnO ETL的Yb掺杂策略可以为提高在空气中制备的器件的效率和稳定性提供一种新方法。
