23.2% efficient low band gap perovskite solar cells with cyanogen management

This scientific paper explores the challenges of efficiency and stability in perovskite solar cells (PSCs), particularly those utilising PEDOT:PSS as a hole transport layer. It identifies that undesirable chemical interactions at the interface, involving the diffusion of organohalide cations from the perovskite, deactivate PSS and lead to performance loss. While thiocyanate additives can improve performance by mitigating iodine formation, they also form corrosive cyanogens in the presence of moisture, compromising device stability. The research demonstrates that incorporating an iodine reductant like benzyl hydrazine chloride (BHC) can significantly enhance both the power conversion efficiency and operational lifetime of lead-tin PSCs under ambient conditions.

How Paios contributed to this work

Fluxim’s PAIOS all-in-one characterization tool was utilised for the characterisation of perovskite solar cells. This setup specifically enabled the conduction of Transient Photocurrent (TPC) and Intensity Modulated Photocurrent Spectroscopy (IMPS) measurements on devices with a pixel area of 4.5 mm²