Direct Band Gap Chalcohalide Semiconductors: Quaternary AgBiSCl₂ Nanocrystals

Danila Quarta; Stefano Toso; Antonio Fieramosca; Lorenzo Dominici; Rocco Caliandro; Anna Moliterni; David Maria Tobaldi; Gabriele Saleh; Irina Gushchina; Rosaria Brescia; Mirko Prato; Ivan Infante; Adriano Cola; Cinzia Giannini; Liberato Manna; Giuseppe Gigli; Carlo Giansante

doi:10.1021/acs.chemmater.3c01403

journal article·2023-12-12Open access

Direct Band Gap Chalcohalide Semiconductors: Quaternary AgBiSCl₂ Nanocrystals

Danila Quarta, Stefano Toso, Antonio Fieramosca, Lorenzo Dominici, Rocco Caliandro, Anna Moliterni, David Maria Tobaldi, Gabriele Saleh, Irina Gushchina, Rosaria Brescia, Mirko Prato, Ivan Infante, Adriano Cola, Cinzia Giannini, Liberato Manna, Giuseppe Gigli, Carlo Giansante

Chemistry of Materials· Volume 35· Issue 23

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Abstract

High Resolution Image Download MS PowerPoint Slide Heavy pnictogen chalcohalide semiconductors are coming under the spotlight for energy conversion applications. Here we present the colloidal synthesis of phase pure AgBiSCl 2 nanocrystals. This quaternary chalcohalide compound features a quasi-two-dimensional crystal structure and a direct band gap, in contrast with the monodimensional structure and the indirect band gap peculiar to the orthorhombic, ternary Bi chalcohalides. Consistently, colloidal AgBiSCl 2 nanocrystals exhibit photoinduced luminescence compatible with both band edge excitons and midgap states. This is the first observation of band edge emission in chalcohalide nanomaterials at large, although exciton recombination in our AgBiSCl 2 nanocrystals mostly occurs via nonradiative pathways. This work further advances our knowledge on this class of mixed anion semiconductor nanomaterials and provides a contribution to establishing chalcohalides as a reliable alternative to metal chalcogenides and halides.

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Research context

Nanomaterials Electronic materials

OpenAlex topics: Crystal Structures and Properties · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Consiglio Nazionale delle Ricerche, Istituto di Nanotecnologia − CNR NANOTEC, Via Monteroni, 73100 Lecce, Italy

Istituto Italiano di Tecnologia − IIT, Via Morego 30, 16163 Genova, Italy

Consiglio Nazionale delle Ricerche, Istituto di Cristallografia − CNR IC, Via Amendola 122/o, 70126 Bari, Italy

Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States

BCMaterials, Basque Center for Materials, Applications, and Nanostructures, UPV/EHU Science Park, Leioa 48940, Spain

Ikerbasque, Basque Foundation for Science, Bilbao 48009, Spain

Consiglio Nazionale delle Ricerche, Istituto di Microelettronica e Microsistemi − CNR IMM, Via Monteroni, 73100 Lecce, Italy

Dipartimento di Fisica, Università del Salento, Via per Arnesano, 73100 Lecce, Italy

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