Eco-Friendly Boost for Perovskite Photovoltaics: Harnessing Cellulose-Modified SnO₂ as a High-Performance Electron Transporting Material

Natural Chelating Agent-Treated Electron Transfer Layer for Friendly Environmental and Efficient Perovskite Solar Cells

“…This is mainly due to the interaction between PASP and SnO 2 nanoparticles, and PASP has a large steric hindrance that can inhibit the aggregation of SnO 2 colloids, thereby prolonging the stability of the precursor solution and improving the uniformity of the prepared SnO 2 ETL. Studies have shown that the surface electrostatic potential of nanoparticles is commonly used to maintain their stability in solution, overcoming the attraction between them and preventing them from uniting due to mutual attraction . For SnO 2 colloid solution, with the increase in aging time, the electrostatic potential of SnO 2 nanoparticles will become smaller and the repulsion between them will decrease, thus increasing the possibility of agglomeration.…”