Li Yahong, Song Jing, Zhang Yang, Kong Tengfei, Liu Xufu, Bi Dongqin
School of Materials Science and Engineering, State Key Laboratory of Optoelectronic Materials and Technology, Guangdong Provincial Key Laboratory of Low Carbon Chemistry and Process Energy Conservation, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, Sun Yat-sen University, Guangzhou 510275, P. R. China.
J Phys Chem Lett. 2022 Nov 17;13(45):10597-10602. doi: 10.1021/acs.jpclett.2c02995. Epub 2022 Nov 9.
Interface instability has evolved into the primary aspect that limits the durability improvement of perovskite solar cells (PSCs). Interface modification with suitable molecules is widely considered an effective path for improving the interface state. Herein, an ionic liquid modified layer, 1-ethyl-3-methylimidazolium aminoacetate (EMIMAE), is brought to modify NiO/perovskite interface. The EMIMAE layer can interact with the adjacent layer to regulate the perovskite growth, passivate defects in the film, and promote charge transport in PSCs. Eventually, the optimized device's efficiency rises to 18.6%, which is a substantial improvement over the control device. Particularly, after 1000 h of continuous maximum power point tracking, the device can still retain 95% of its initial efficiency. This work proposes a simple idea to ameliorate the device interface and boost the commercialization of NiO based devices.
