Multistrategy Preparation of Efficient and Stable Environment-Friendly Lead-Based Perovskite Solar Cells

Perovskite solar cells (PSCs) have achieved huge success in power conversion efficiency (PCE) and stability. However, further improving the PCE of PSCs and stability is still a big challenge. Here, we attempt to improve the PCE and stability of PSCs using a functional additive named 3-mercaptopropyltriethoxysilane (SiSH) in the perovskite antisol-vent. It is revealed that SiSH can release the stress in the film, reduce the defects, and inhibit lithium-ion migration and lead leakage. As a result, the target device achieves an efficiency enhancement from 20.80 to 22.42% as compared to the control device. Meanwhile, device stability is ameliorated after SiSH modification. Furthermore, new adsorbents are used to treat the leaked lead to make it comply with safe drinking water standards. This work provides an idea for developing multifunctional antisolvent additives and adsorbents for high PCE, long stability, and environment-friendly Pb-based PSCs.

Automated summary

This study attempts to improve the power conversion efficiency (PCE) and stability of perovskite solar cells (PSCs) using a functional additive called 3-mercaptopropyltriethoxysilane (SiSH) in the perovskite antisolvent. The results show that SiSH can release stress in the film, reduce defects, and inhibit lithium-ion migration and lead leakage. Additionally, new adsorbents are used to treat leaked lead to meet safe drinking water standards. This work provides insights into developing multifunctional antisolvent additives and adsorbents for high PCE, long stability, and environmentally friendly Pb-based PSCs.