Improving the Performance and Reproducibility of Inverted Planar Perovskite Solar Cells Using Tetraethyl Orthosilicate as the Antisolvent

-based planar PSC for engineering an efficient perovskite layer, achieving a power conversion efficiency of 17.02% on glass substrates and 14.49% on flexible polymer substrates with negligible hysteresis, which even outperformed TL and CB. More importantly, TEOS PSCs exhibited much higher reproducibility than that of their counterparts. These desirable features should be ascribed to the higher-quality perovskite films with larger grain size, reduced density of defects, and thus smoother carrier transportation and slower carrier recombination. This work drives another step toward industrial-scale commercialization of PSCs and also paves the way for environmentally friendly photovoltaic applications.