Improved stability and electrical properties in CsPbIBr 2 thin films through magnesium and acetate co-doping Ahmet Nazligul and Mingqing Wang University College London, United Kingdom The research interest on perovskite solar cells has increased substantially in the past 10 years as these solar cells have been breaking record after record. However, one persistent issue for perovskite solar cells that hinders their commercial availability has been their low stability. Fully-inorganic Cs-based perovskites have been developed as an alternative to hybrid perovskites since these perovskites are relatively more stable 1 . Still, one problem is that the stability is lower in low bandgap Cs-based perovskites compare to high bandgap Cs- based perovskites 2 . In this study we investigated the potential of CsPbIBr2 which is a relatively high bandgap perovskite 3 . We have co-doped CsPbIBr2 thin-films with magnesium and acetate through a simple solution based method. At the low doping levels of 0.5%, the thin-films shows improved crystal structure, less charge- recombination and prolonged film life while having minimal effect on the bandgap. In our opinion this method has a strong potential to increase the device efficiency and stability. References 1. Wanchun Xiang, Shengzhong (Frank) Liu and Wolfgang Tress; Energy Environ. Sci., 2021, 14, 2090-2113; DOI: 10.1039/ D1EE00157D 2. Riccardo Montecucco, Eleonora Quadrivi, Riccardo Po, Giulia Grancini; Adv. Energy Mater. 2021, 11, 2100672; DOI: 10.1002/aenm.202100672 3. Jyoti V. Patil, Sawanta S. Mali, and Chang Kook Hong; ACS Sustainable Chem. Eng. 2020, 8, 43, 16364–16371; DOI: 10.1021/acssuschemeng.0c06452
P17
© The Author(s), 2022
Made with FlippingBook Learn more on our blog