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Effective Suppressing Phase Segregation of Mixed-Halide Perovskite by Glassy Metal-Organic Frameworks.
Ghasemi, Mehri; Li, Xuemei; Tang, Cheng; Li, Qi; Lu, Junlin; Du, Aijun; Lee, Jaeho; Appadoo, Dominique; Tizei, Luiz H G; Pham, Sang T; Wang, Lianzhou; Collins, Sean M; Hou, Jingwei; Jia, Baohua; Wen, Xiaoming.
Afiliación
  • Ghasemi M; School of Science, RMIT University, Melbourne, VIC, 3000, Australia.
  • Li X; School of Chemical Engineering, The University of Queensland, St. Lucia, QLD, 4072, Australia.
  • Tang C; School of Chemistry and Physics, Centre for Materials Science, Queensland University of Technology, 2 George St, Brisbane City, QLD, 4001, Australia.
  • Li Q; Centre for Translational Atomaterials, Swinburne University of Technology, Hawthorn, VIC, 3122, Australia.
  • Lu J; Centre for Translational Atomaterials, Swinburne University of Technology, Hawthorn, VIC, 3122, Australia.
  • Du A; School of Chemistry and Physics, Centre for Materials Science, Queensland University of Technology, 2 George St, Brisbane City, QLD, 4001, Australia.
  • Lee J; School of Chemical Engineering, The University of Queensland, St. Lucia, QLD, 4072, Australia.
  • Appadoo D; Australian Synchrotron, 800 Blackburn Rd, Clayton, VIC, 3168, Australia.
  • Tizei LHG; Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405, Orsay, France.
  • Pham ST; Bragg Centre for Materials Research, School of Chemical and Process Engineering and School of Chemistry, University of Leeds, LS2 9JT, Leeds, UK.
  • Wang L; School of Chemical Engineering, The University of Queensland, St. Lucia, QLD, 4072, Australia.
  • Collins SM; Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, QLD, 4072, Australia.
  • Hou J; Bragg Centre for Materials Research, School of Chemical and Process Engineering and School of Chemistry, University of Leeds, LS2 9JT, Leeds, UK.
  • Jia B; School of Chemical Engineering, The University of Queensland, St. Lucia, QLD, 4072, Australia.
  • Wen X; School of Science, RMIT University, Melbourne, VIC, 3000, Australia.
Small ; 19(50): e2304236, 2023 Dec.
Article en En | MEDLINE | ID: mdl-37616513
Lead mixed-halide perovskites offer tunable bandgaps for optoelectronic applications, but illumination-induced phase segregation can quickly lead to changes in their crystal structure, bandgaps, and optoelectronic properties, especially for the Br-I mixed system because CsPbI3 tends to form a non-perovskite phase under ambient conditions. These behaviors can impact their performance in practical applications. By embedding such mixed-halide perovskites in a glassy metal-organic framework, a family of stable nanocomposites with tunable emission is created. Combining cathodoluminescence with elemental mapping under a transmission electron microscope, this research identifies a direct relationship between the halide composition and emission energy at the nanoscale. The composite effectively inhibits halide ion migration, and consequently, phase segregation even under high-energy illumination. The detailed mechanism, studied using a combination of spectroscopic characterizations and theoretical modeling, shows that the interfacial binding, instead of the nanoconfinement effect, is the main contributor to the inhibition of phase segregation. These findings pave the way to suppress the phase segregation in mixed-halide perovskites toward stable and high-performance optoelectronics.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Small Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2023 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Alemania

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Small Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2023 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Alemania