Ribbons of Light: Emerging (Sb,Bi)(S,Se)(Br,I) Van der Waals chalcohalides for next-generation energy applications

(Sb,Bi)(S,Se)(Br,I) pnictogen chalcohalides constitute an emerging family of Van der Waals (VdW) semiconductors with remarkable potential for energy-related applications, including photovoltaics (PV), photocatalysis (PC), and photoelectrocatalysis (PEC). These ternary compounds exhibit a quasi-1D or...

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Autores: Caño Prades, Ivan|||0000-0003-4226-1527, Navarro Güell, Alejandro, Maggi, Edoardo, Gon Medaille, Axel|||0000-0002-8628-0781, Rovira Ferrer, David|||0000-0003-3867-8987, Jiménez Arguijo, Alex|||0000-0002-3583-0958, Segura Blanch, Oriol, Torrens Dinarès, Arnau, Jiménez Guerra, Maykel|||0000-0002-1778-8805, López Álvarez, Cibrán, Benítez Colominas, Pol, Cazorla Silva, Claudio|||0000-0002-6501-4513, Jehl, Zacharie Victor Samuel Na|||0000-0002-2610-5973, Gong, Yuancai|||0000-0003-3548-9064, Soler Turu, Lluís|||0000-0003-1591-3366, Llorca Piqué, Jordi|||0000-0002-7447-9582, Tamarit Mur, José Luis|||0000-0002-7965-0000, Puigdollers i González, Joaquim|||0000-0002-1834-2565, Placidi, Marcel Jose|||0000-0001-5684-9669, Saucedo Silva, Edgardo Ademar|||0000-0003-2123-6162
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/446253
Acceso en línea:https://hdl.handle.net/2117/446253
https://dx.doi.org/10.1002/smll.202505430
Access Level:acceso abierto
Palabra clave:Àrees temàtiques de la UPC::Enginyeria química
Descripción
Sumario:(Sb,Bi)(S,Se)(Br,I) pnictogen chalcohalides constitute an emerging family of Van der Waals (VdW) semiconductors with remarkable potential for energy-related applications, including photovoltaics (PV), photocatalysis (PC), and photoelectrocatalysis (PEC). These ternary compounds exhibit a quasi-1D orthorhombic crystalline phase, and an electronic structure analogous to lead-halide perovskites, making them promising candidates for sustainable and high-performance energy devices. This study introduces a new versatile and adaptable synthesis methodology, which combines co-evaporation of binary chalcogenides with reactive annealing under high-pressure halide atmospheres, to fabricate the eight (Sb,Bi)(S,Se)(Br,I) chalcohalides. Comprehensive structural, compositional, and optoelectronic analyses reveal a wide bandgap range (1.2–2.2 eV), high absorption coefficients, and anisotropic properties driven by unique ribbon-like morphology. Theoretical and experimental results highlight their high stability, versatile chemical adaptability, and defect-tolerant characteristics. Moreover, the distinct differences in morphology and crystallization between Sb and Bi-based compounds, as well as the influence of chalcogen and halogen elements on the optical and structural properties are discussed. Demonstrations of functional devices, including photocatalytic systems, underscore the practical viability of these materials. This work establishes a foundation for the development of pnictogen chalcohalides as scalable and eco-friendly alternatives for advanced energy applications.

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