Proceedings of MATSUS Fall 2024 Conference (MATSUSFall24)
DOI: https://doi.org/10.29363/nanoge.matsusfall.2024.237
Publication date: 28th August 2024
Quaternary Mixed-Metal Chalcohalides (MMCs), composed of Group IV and V elements such as Pb, Sn, Bi, and Sb, along with halide and chalcogenide ions, are an emerging class of perovskite-inspired ns2 semiconductors (1). These materials possess promising optical and electronic properties, which are due to two key features: the presence of two ns2 cations and spontaneous polarization. These result in a lower probability of carrier capture (2,3). While these materials are highly desirable for various applications in energy conversion and storage devices, their potential use may be limited by the challenges associated with synthesizing chalcohalide thin films. For instance, they often require non-solution methods or multi-step processes (1,4).
In my presentation, I will discuss our most recent research on MMCs. The initial portion of my talk will focus on the single-step, solution-based fabrication and the characterization of Pb-Sb-S-I and Sn-Sb-S-I MMC compositions. I will also highlight the impressive stability of these MMC compositions, both in terms of material and device performance under ambient air, humidity, and operation. Towards the end, I will present some of our preliminary findings related to the light-harvesting capabilities of these MMCs.
G.K.G. thanks Tampere Institute for Advanced Study (IAS), Tampere University, for postdoctoral research funding. The work is part of the Research Council of Finland Flagship Programme, Photonics Research and Innovation (PREIN), decision number 346511.
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