Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
DOI: https://doi.org/10.29363/nanoge.matsus.2024.294
Publication date: 18th December 2023
The toxicity and bioavailability of lead (Pb) in halide perovskites motivates the search of Pb-free perovskite-inspired materials (PIMs), which would replicate the great optoelectronic properties of the traditional Pb-based counterparts. PIMs employing pnictogen cations from Group VA of the periodic table (e.g., antimony (III) (Sb3+) and bismuth (III) (Bi3+)) have recently emerged as low-toxicity alternatives for Pb-based halide perovskites, with applications in photovoltaics and beyond [1]. In particular, Bi-based PIMs are interesting because can lead to shallow traps and high defect tolerance in some compositions, while being eco-friendly. This field of research is, however, still in its early infancy with a growing number of efforts to improve the device efficiencies and lifetimes, with the majority of the studies focusing on the shelf-life rather than the operational stability.
In this talk, I will summarize key recent examples of bismuth-based PIMs studied by us for a range of applications, from photovoltaics for outdoor and indoor, non-linear optics, photocatalysis. In particular, I will summarize our recent findings on CU2AgBiI6 PIM and the compositional engineering efforts to improve its morphology and charge carrier transport [2,3]. I will also highlight novel Bi-based compositions for solar cells and indoor photovoltaics.
P.V. thanks Academy of Finland (Decision No 347772) and Jane and Aatos Erkko foundation (SOL-TECH project) for the financial support. This work is part of the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), Decision No. 320165.
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