Solution-phase synthesis and photoluminescence of quaternary chalcohalide semiconductors
Roth, Alison N. (Iowa State University. Department of Chemistry)
Opare-Addo, Jemima (Iowa State University. Department of Chemistry)
Gi, Eunbyeol (Iowa State University. Department of Chemistry)
Mena Fernández, Silvia (Universitat Autònoma de Barcelona. Departament de Química)
Guirado López, Gonzalo (Universitat Autònoma de Barcelona. Departament de Química)
Schaller, Richard D. (Northwestern University. Department of Chemistry (US))
Smith, Emily A. (Iowa State University. Department of Chemistry)
Vela, Javier (Iowa State University. Department of Chemistry)

Data:	2023
Resum:	Mixed-metal chalcohalide semiconductors have emerged as promising candidates for photovoltaic applications. However, preparation of these multinary compounds using solution-phase techniques remains particularly challenging compared to traditional solid-state methods. To fully harness their potential, it is desirable to develop synthetic methods that enable control over both the phase purity and dimensionality of chalcohalides. Here, we report the solution-phase synthesis of PbSbSI and PbBiSI quaternary chalcohalides using readily available precursors. Fine tuning of reaction parameters allows for the isolation of rod-like morphologies with tunable diameters and aspect ratios. The quaternary chalcohalides display photoluminescence as an ensemble as well as at the single particle level, as demonstrated using fluorescence microscopy. We further evaluate the relative stability and band gap of PbSbSI polymorphs and their coloring patterns using electronic structure calculations. The synthetic methods developed here will motivate the study of ever more complex chalcohalides and other multinary semiconductors for new technological applications.
Ajuts:	Agencia Estatal de Investigación PID2019-106171RB-I00
Nota:	Altres ajuts: Margarita Salas UCM postdoctoral grants funded by the Spanish Ministry of Universities with European Union funds -NextGenerationEU
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Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Chalcohalides ; Quaternary semiconductors ; Solution synthesis ; Photoluminescence ; Fine tuning ; Mixed-metals ; Phase purity ; Photovoltaic applications ; Reaction parameters ; Rod-like morphology ; Solid state method ; Solution phase ; Solution phase synthesis ; Synthetic methods
Publicat a:	Chemistry of materials, Vol. 35, Issue 5 (March 2023) , p. 2165-2172, ISSN 1520-5002

DOI: 10.1021/acs.chemmater.3c00011

Postprint 10 p, 1.2 MB

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