Unravelling the Photocatalytic Behavior of All-Inorganic Mixed Halide Perovskites: The Role of Surface Chemical States
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Otros documentos de la autoría: Gualdrón Reyes, Andrés Fabián; Rodriguez-Pereira, Jhonatan; Amado - González, Eliseo; Rueda-P, Jorge; Ospina, Rogelio; Masi, Sofia; YOON, SEOG JOON; Tirado, Juan; Jaramillo, Franklin; Agouram, Said; Muñoz-Sanjosé, Vicente; Giménez Juliá, Sixto; Mora-Sero, Ivan
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Título
Unravelling the Photocatalytic Behavior of All-Inorganic Mixed Halide Perovskites: The Role of Surface Chemical StatesAutoría
Fecha de publicación
2019-12Editor
American Chemical SocietyISSN
1944-8244; 1944-8252Cita bibliográfica
Andrés F. Gualdrón-Reyes, Jhonatan Rodríguez-Pereira, Eliseo Amado-González, Jorge Rueda-P, Rogelio Ospina, Sofia Masi, Seog Joon Yoon, Juan Tirado, Franklin Jaramillo, Said Agouram, Vicente Muñoz-Sanjosé, Sixto Giménez, and Iván Mora-Seró. Unravelling the Photocatalytic Behavior of All-Inorganic Mixed Halide Perovskites: The Role of Surface Chemical States. ACS Applied Materials & Interfaces, 2020 12 (1), 914-924Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://pubs.acs.org/doi/abs/10.1021/acsami.9b19374Versión
info:eu-repo/semantics/submittedVersionPalabras clave / Materias
Resumen
Within the most mesmerizing materials in the world of optoelectronics, mixed halide perovskites (MHPs) have been distinguished because of the tunability of their optoelectronic properties, balancing both the light-h ... [+]
Within the most mesmerizing materials in the world of optoelectronics, mixed halide perovskites (MHPs) have been distinguished because of the tunability of their optoelectronic properties, balancing both the light-harvesting efficiency and the charge extraction into highly efficient solar devices. This feature has drawn the attention of analogous hot topics as photocatalysis for carrying out more efficiently the degradation of organic compounds. However, the photo-oxidation ability of perovskite depends not only on its excellent light-harvesting properties but also on the surface chemical environment provided during its synthesis. Accordingly, we studied the role of surface chemical states of MHP-based nanocrystals (NCs) synthesized by hot-injection (H-I) and anion-exchange (A-E) approaches on their photocatalytic (PC) activity for the oxidation of β-naphthol as a model system. We concluded that iodide vacancies are the main surface chemical states that facilitate the formation of superoxide ions, O2●–, which are responsible for the PC activity in A-E-MHP. Conversely, the PC performance of H-I-MHP is related to the appropriate balance between band gap and a highly oxidizing valence band. This work offers new insights on the surface properties of MHP related to their catalytic activity in photochemical applications. [-]
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ACS Applied Materials & Interfaces, 2020, vol. 12, no 1Derechos de acceso
Copyright © American Chemical Society
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