Polymorphic Control of CsGaE <sub>2</sub> (E = S, Se) Using Diorganyl Dichalcogenide Precursors
Diorganyl dichalcogenides (R-E-E-R, where R = organyl and E = S, Se, Te) are employed for the polymorphic control of diamond-like crystal structures, due to their tunable C-E bond reactivity. In this work, we extend their application to non-close-packed alkali-metal-based chalcogenides by demonstrating the selective synthesis of CsGaE<sub>2</sub> (E = S, Se) polymorphs. Weaker C-E bonds or higher temperatures promote the formation of the thermodynamically stable <i>mC</i>64 phases, while stronger C-E bonds or lower temperatures allow for the isolation of the metastable <i>mC</i>16 phases. Heat-treatment studies reveal the pronounced metastability of CsGaSe<sub>2</sub>-<i>mC</i>16 particles and the irreversible phase transition of CsGaS<sub>2</sub> analogous to its bulk counterpart.
Authors
- Richard L. Brutchey (ORCID: https://orcid.org/0000-0002-7781-5596)
- Shaama Mallikarjun Sharada (ORCID: https://orcid.org/0000-0001-7332-5373)
- Zhaohong Sun (ORCID: https://orcid.org/0000-0002-6176-0308)
- Eitan I. Feldman
- U. Saleem (ORCID: https://orcid.org/0000-0001-7955-8215)
- Christopher P. Pakhanyan (ORCID: https://orcid.org/0009-0009-4188-9567)
Institutions
- University of Southern California (US)
- California Southern University (US)
- Department of Physics, Mathematics and Informatics (BY)
- Applied Natural Sciences (US)
- Rice University (US)
Publication Details
- Journal
- Inorganic Chemistry
- Published
- 2025-10-24
- DOI
- https://doi.org/10.1021/acs.inorgchem.5c04153
- Citations
- 2
- Primary Topic
- Chalcogenide Semiconductor Thin Films
- Type
- article
- Field-Weighted Citation Impact
- 1.46