Utilization of coordinating green solvents for high quality methylammonium bismuth iodide thin films for photovoltaic applications
Makaleler > Tam Makale · 2021
Yazarlar: Adem MUTLU, Tamer Yeşil, Ceylan ZAFER
Organic Electronics, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2021, cilt 95, ss 106191-106191
DOI: 10.1016/j.orgel.2021.106191
Özet
Photovoltaic performances of the bismuth-based solar cells are profoundly affected by the thin film quality of the photoactive layer. Herein, we report on various green solvent system to obtain the highly crystalline, pinhole free and homogeneously methylammonium bismuth iodide (MBI) active layer. The MBI structure prepared with tetrahydrofuran:2-ethoxy-ethanol (THF-2ETO) solvent system was found to have the best film quality. Adding 0.05 M 2ETO as the co-solvent is sufficient to produce high quality BiI3 and MBI thin films. According to the X-ray photoelectron spectroscopy (XPS) analyzes, we have demonstrated that there is an interaction between BiI3 and 2ETO according to the concentration of 2ETO added to the main THF. Our study clarifies the importance of THF-2ETO solvent system that can accelerate the evolution of the Bi-based solar cells by creating high-quality BiI3 or MBI thin films.