Koech Richard K, Olanrewaju Yusuf A, Ichwani Reisya, Kigozi Moses, Oyewole Deborah O, Oyelade Omolara V, Sanni Dahiru M, Adeniji Sharafadeen A, Colin-Ulloa Erika, Titova Lyubov V, Martin Julia L, Grimm Ronald L, Bello Abdulhakeem, Oyewole Oluwaseun K, Ntsoenzok Esidor, Soboyejo Winston O
Department of Materials Science and Engineering, African University of Science and Technology, Km. 10 Airport Road, Abuja, Nigeria.
Department of Mechanical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01609, USA.
Sci Rep. 2022 Jul 27;12(1):12860. doi: 10.1038/s41598-022-15923-y.
In this paper, we use Polyethylene Oxide (PEO) particles to control the morphology of Formamidinium (FA)-rich perovskite films and achieve large grains with improved optoelectronic properties. Consequently, a planar perovskite solar cell (PSC) is fabricated with additions of 5 wt% of PEO, and the highest PCE of 18.03% was obtained. This solar cell is also shown to retain up to 80% of its initial PCE after about 140 h of storage under the ambient conditions (average relative humidity of 62.5 ± 3.25%) in an unencapsulated state. Furthermore, the steady-state PCE of the PEO-modified PSC device remained stable for long (over 2500 s) under continuous illumination. This addition of PEO particles is shown to enable the tuning of the optoelectronic properties of perovskite films, improvements in the overall photophysical properties of PSCs, and an increase in resistance to the degradation of PSCs.
在本文中，我们使用聚环氧乙烷（PEO）颗粒来控制富甲脒（FA）钙钛矿薄膜的形貌，并获得具有改善的光电性能的大晶粒。因此，制备了添加5 wt% PEO的平面钙钛矿太阳能电池（PSC），并获得了18.03%的最高功率转换效率（PCE）。该太阳能电池在未封装状态下于环境条件（平均相对湿度为62.5±3.25%）下储存约140小时后，还显示出保留了其初始PCE的80%。此外，PEO改性PSC器件的稳态PCE在连续光照下长时间（超过2500秒）保持稳定。添加PEO颗粒被证明能够调节钙钛矿薄膜的光电性能，改善PSC的整体光物理性能，并提高PSC对降解的抗性。
