Organosilica Nanodots Assisted Stability and Performance Improvements of CsPbI ₂ Br Solar Cell

Since the commercialization of perovskite solar cells (PSCs) for deep water, device stability has become critical. Although solar cells based on all‐inorganic perovskite are a kind of device with wide application prospects due to the adjustable bandgap of the optical absorption layer material. At present, compared with organic–inorganic hybrid PSCs, there are still more unsolved problems. In this work, we introduce an organosilica nanodot (OSiND) with good electron transport ability as a complement to SnO ₂ . By mixing SnO ₂ nanocrystals with smaller OSiNDs, a sandstone mixed structure is formed, which promotes carrier extraction and improves the crystal quality of the perovskite layer. Devices with better performance and significantly improved stability are obtained. Through the study on hybrid perovskite and the observation of device aging results under different conditions, it is proven that OSiNDs are of great significance to obtain better quality perovskite.