Stability in Perovskite-Inspired Materials for Light Conversion and Harvesting Devices

The exceptional optoelectronic properties of lead-halide perovskites have enabled its application beyond solar cells, and has driven forth substantial efforts to discover broader classes of materials that could emulate its properties, especially in lead-free and stable compounds [1,2]. Such materials are broadly termed ‘perovskite-inspired’, and include compounds that are electronically analogous to lead-halide perovskites, and do not necessarily have the perovskite crystal structure. In this talk, I will discuss our work on chalcohalide and chalcogenide compounds for solar fuel and indoor photovoltaic applications, particularly focussing on their stability. I will discuss our recent work on device architecture engineering to enable halide perovskites and BiOI, which are both readily damaged in liquid electrolytes, to operate stably for water splitting and CO₂ reduction [3,4]. For indoor photovoltaics, I will discuss our work on BiSBr, which we show to hold potential as a light harvester, particularly demonstrating improved stability over halide perovskites under damp-heat conditions [5]. I will finish off by discussing our recent work on developing Sb₂S₃ minimodules, and the demonstration of these indoor photovoltaics to power Internet of Things electronics under ambient environments without encapsulation for extended periods of time [6].

References

[1] Blakesley, …, Stranks,* Hoye,* J. Phys. Energy, 6, 041501 (2024)
[2] Mosquera-Loi, …, Walsh,* Hoye,* arXiv: 2408.16663 (2024)
[3] Andrei, et al., Nature, 608, 518 (2022)
[4] Andrei, Jagt,…, Hoye,* Reisner,* Nat. Mater., 21, 864 (2022)
[5] Guo, .., Hoye,* J. Mater. Chem. A, 11, 22775 (2023)
[6] Chen, …, Chen,* Hoye,* Zhou,* Light Sci. Appl., 13, 281 (2024)