2nd Conference on Green Engineering, Sustainable Materials, and Technologies for Circular Economy (GREEN CIRC '25)

Enhancing FAPbI₃ Perovskite Stability Against UV, Moisture, and Temperature Degradation with Polyionic Liquids

Not scheduled

20m

Amphitheatre (Faculty of Technology and Metallurgy, Ss Cyril and Methodius University in Skopje)

Poster presentation

Speaker

Vladimir Rajić (Vinca Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia)

Description

This study investigates the degradation of FAPbI₃ perovskite under environmental stressors, including UV exposure, moisture, and temperature, and explores the potential of two polyionic liquids (PILs) know by Poly(lithium bis(trifluoromethanesulfonyl)imide) (PolyLiTFSI) and 1-Butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (PolyImidazoliumTFSI) to enhance its stability. FAPbI₃, a promising material for solar cell applications, is highly susceptible to degradation when exposed to external stressors. These stressors induce phase transitions, leading to a decrease in performance and long-term instability. The incorporation of PILs, known for their stability, was explored as a strategy to mitigate these degradation effects. The degradation of FAPbI₃ films was tracked through UV-VIS spectroscopy, XPS, XRD, and SEM analysis. The films were subjected to controlled UV, moisture, and temperature exposure. The two polyionic additives demonstrated improvements in stability, delaying degradation under all stressors. Both PILs exhibited enhanced resistance to UV and moisture-induced phase transitions and better stability at elevated temperatures. By reducing the rate of degradation and preserving the structural integrity of FAPbI₃, these additives offer a promising approach to enhance the durability of perovskite-based solar cells.