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Phase Transitions in Low-Dimensional Layered Double Perovskites: The Role of the Organic Moieties

[Image: see text] Halide double perovskites are an interesting alternative to Pb-containing counterparts as active materials in optoelectronic devices. Low-dimensional double perovskites are fabricated by introducing large organic cations, resulting in organic/inorganic architectures with one or mor...

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Autores principales: Martín-García, Beatriz, Spirito, Davide, Biffi, Giulia, Artyukhin, Sergey, Francesco Bonaccorso, Krahne, Roman
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7872418/
https://www.ncbi.nlm.nih.gov/pubmed/33337162
http://dx.doi.org/10.1021/acs.jpclett.0c03275
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author Martín-García, Beatriz
Spirito, Davide
Biffi, Giulia
Artyukhin, Sergey
Francesco Bonaccorso,
Krahne, Roman
author_facet Martín-García, Beatriz
Spirito, Davide
Biffi, Giulia
Artyukhin, Sergey
Francesco Bonaccorso,
Krahne, Roman
author_sort Martín-García, Beatriz
collection PubMed
description [Image: see text] Halide double perovskites are an interesting alternative to Pb-containing counterparts as active materials in optoelectronic devices. Low-dimensional double perovskites are fabricated by introducing large organic cations, resulting in organic/inorganic architectures with one or more inorganic octahedra layers separated by organic cations. Here, we synthesized layered double perovskites based on 3D Cs(2)AgBiBr(6), consisting of double (2L) or single (1L) inorganic octahedra layers, using ammonium cations of different sizes and chemical structures. Temperature-dependent Raman spectroscopy revealed phase transition signatures in both inorganic lattice and organic moieties by detecting variations in their vibrational modes. Changes in the conformational arrangement of the organic cations to an ordered state coincided with a phase transition in the 1L systems with the shortest ammonium moieties. Significant changes of photoluminescence intensity observed around the transition temperature suggest that optical properties may be affected by the octahedral tilts emerging at the phase transition.
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spelling pubmed-78724182021-02-10 Phase Transitions in Low-Dimensional Layered Double Perovskites: The Role of the Organic Moieties Martín-García, Beatriz Spirito, Davide Biffi, Giulia Artyukhin, Sergey Francesco Bonaccorso, Krahne, Roman J Phys Chem Lett [Image: see text] Halide double perovskites are an interesting alternative to Pb-containing counterparts as active materials in optoelectronic devices. Low-dimensional double perovskites are fabricated by introducing large organic cations, resulting in organic/inorganic architectures with one or more inorganic octahedra layers separated by organic cations. Here, we synthesized layered double perovskites based on 3D Cs(2)AgBiBr(6), consisting of double (2L) or single (1L) inorganic octahedra layers, using ammonium cations of different sizes and chemical structures. Temperature-dependent Raman spectroscopy revealed phase transition signatures in both inorganic lattice and organic moieties by detecting variations in their vibrational modes. Changes in the conformational arrangement of the organic cations to an ordered state coincided with a phase transition in the 1L systems with the shortest ammonium moieties. Significant changes of photoluminescence intensity observed around the transition temperature suggest that optical properties may be affected by the octahedral tilts emerging at the phase transition. American Chemical Society 2020-12-18 2021-01-14 /pmc/articles/PMC7872418/ /pubmed/33337162 http://dx.doi.org/10.1021/acs.jpclett.0c03275 Text en © 2020 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
spellingShingle Martín-García, Beatriz
Spirito, Davide
Biffi, Giulia
Artyukhin, Sergey
Francesco Bonaccorso,
Krahne, Roman
Phase Transitions in Low-Dimensional Layered Double Perovskites: The Role of the Organic Moieties
title Phase Transitions in Low-Dimensional Layered Double Perovskites: The Role of the Organic Moieties
title_full Phase Transitions in Low-Dimensional Layered Double Perovskites: The Role of the Organic Moieties
title_fullStr Phase Transitions in Low-Dimensional Layered Double Perovskites: The Role of the Organic Moieties
title_full_unstemmed Phase Transitions in Low-Dimensional Layered Double Perovskites: The Role of the Organic Moieties
title_short Phase Transitions in Low-Dimensional Layered Double Perovskites: The Role of the Organic Moieties
title_sort phase transitions in low-dimensional layered double perovskites: the role of the organic moieties
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7872418/
https://www.ncbi.nlm.nih.gov/pubmed/33337162
http://dx.doi.org/10.1021/acs.jpclett.0c03275
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