Light Stability Enhancement of Perovskite Solar Cells Using 1H,1H,2H,2H-Perfluorooctyltriethoxysilane Passivation
Authors
Kanda H., Usiobo O.J., Momblona C., Abuhelaiqa M., Sutanto A.A., Igci C., Gao X.X., Audinot J.N., Wirtz T., Nazeeruddin M.K.
Reference
Solar RRL, vol. 5, n° 3, art. no. 2000650, 2021
Description
Passivation approaches of perovskite surface are key to improve the light stability of perovskite solar cells. However, a passivation strategy is still required to enhance the durability of the perovskite layer. Here, a promising passivation concept is demonstrated by applying a fluorinated agent on the perovskite layer for light stability improvement. Such fluorinated passivation agents can prevent the formation of Pb0 at the perovskite surface resulting in suppressing a defect-induced recombination and improving the durability of the perovskite solar cells. As an additional benefit, the fluorinated passivation agent increases the VOC which improves the photovoltaic performance of the perovskite solar cells. Consequently, with a fluorinated passivation agent, the perovskite maintains a power conversion efficiency of 95% after 300 h of light illumination. It is found that the fluorinated passivation material of 1H,1H,2H,2H-perfluorooctyltriethoxysilane (PFOTES) can improve the stability of the perovskite solar cells.
