Solid-state synthesis of high-purity mixed-chalcogenide perovskites
7 affiliations
- 1Department of Chemical Engineering
- 2University College London
- 3Manufacturing Futures Lab, University College London, 7 Sidings Street, London, United Kingdom, E20 2AE
- 4School of Chemistry
- 5University of Birmingham
- 6Department of Solution-Processing of Hybrid Materials and Devices
- 7Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
Abstract
Recently, chalcogenide perovskites that are fully inorganic and composed of earth-abundant elements are emerging as non-toxic alternatives to established lead-halide perovskite materials. However, chalcogenide perovskite compositions relevant for optoelectronic applications such as solar cells remain largely unexplored due to the complex, high-temperature synthesis routes involved and difficulties in obtaining high purities. Here, we present a new solid-state synthesis route for facile fabrication of mixed-chalcogenide perovskite powders BaZr(S 1−x Se x ) 3 , where 0 ≤ x ≤ 0.3. We obtain high-purity chalcogenide perovskite powders at moderate temperatures (600 ◦ C) and short reaction times (24 hours). We demonstrate that precursor selection and chalcogen stoichiometry can effectively be used to control the perovskite composition. By increasing Se content (x), the band gaps of the mixed-chalcogenide perovskites can be controllably tuned from 1.83 to 1.58 eV, spanning the desired range for single-and multi-junction solar cells. Broadly, our findings establish a generalisable synthesis method for preparing several mixed-chalcogenide perovskite compositions, including BaZr(S 1−x Se x ) 3 and BaHf(S 1−x Se x ) 3 .
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BibTeX
@misc{maoued2026solidstate,
title = {{Solid-state synthesis of high-purity mixed-chalcogenide perovskites}},
author = {Mo El Maoued and Benjamin M. Gallant and Matteo Paloni and Luis Simbari and Shams Elnawawi and Matteo Salvalaglio and Dominik J. Kubicki and Amita Ummadisingu},
howpublished = {ChemRxiv},
year = {2026},
month = sep,
doi = {10.26434/chemrxiv.15009318/v1},
url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009318/v1},
note = {CC BY-NC-ND},
}
RIS
TY - UNPB
TI - Solid-state synthesis of high-purity mixed-chalcogenide perovskites
AU - Mo El Maoued
AU - Benjamin M. Gallant
AU - Matteo Paloni
AU - Luis Simbari
AU - Shams Elnawawi
AU - Matteo Salvalaglio
AU - Dominik J. Kubicki
AU - Amita Ummadisingu
PY - 2026
DA - 2026/09/22
PB - ChemRxiv
DO - 10.26434/chemrxiv.15009318/v1
UR - https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009318/v1
AB - Recently, chalcogenide perovskites that are fully inorganic and composed of earth-abundant elements are emerging as non-toxic alternatives to established lead-halide perovskite materials. However, chalcogenide perovskite compositions relevant for optoelectronic applications such as solar cells remain largely unexplored due to the complex, high-temperature synthesis routes involved and difficulties in obtaining high purities. Here, we present a new solid-state synthesis route for facile fabrication of mixed-chalcogenide perovskite powders BaZr(S 1−x Se x ) 3 , where 0 ≤ x ≤ 0.3. We obtain high-purity chalcogenide perovskite powders at moderate temperatures (600 ◦ C) and short reaction times (24 hours). We demonstrate that precursor selection and chalcogen stoichiometry can effectively be used to control the perovskite composition. By increasing Se content (x), the band gaps of the mixed-chalcogenide perovskites can be controllably tuned from 1.83 to 1.58 eV, spanning the desired range for single-and multi-junction solar cells. Broadly, our findings establish a generalisable synthesis method for preparing several mixed-chalcogenide perovskite compositions, including BaZr(S 1−x Se x ) 3 and BaHf(S 1−x Se x ) 3 .
ER -