Picoperovskites: the smallest conceivable isolated halide perovskite structures formed within carbon nanotubes

<p>Halide perovskite structures are revolutionizing the design of optoelectronic materials, including solar cells, light-emitting diodes, and photovoltaics when formed at the quantum scale. Four isolated sub-nanometer, or picoscale, halide perovskite structures formed inside ≈1.2–1.6 nm single...

Full description

Bibliographic Details
Main Authors: Kashtiban, RJ, Patrick, CE, Ramasse, Q, Walton, RI, Sloan, J
Format: Journal article
Language:English
Published: Wiley 2023
_version_ 1826309602919055360
author Kashtiban, RJ
Patrick, CE
Ramasse, Q
Walton, RI
Sloan, J
author_facet Kashtiban, RJ
Patrick, CE
Ramasse, Q
Walton, RI
Sloan, J
author_sort Kashtiban, RJ
collection OXFORD
description <p>Halide perovskite structures are revolutionizing the design of optoelectronic materials, including solar cells, light-emitting diodes, and photovoltaics when formed at the quantum scale. Four isolated sub-nanometer, or picoscale, halide perovskite structures formed inside ≈1.2–1.6 nm single-walled carbon nanotubes (SWCNTs) by melt insertion from CsPbBr<sub>3</sub> and lead-free CsSnI<sub>3</sub> are reported. Three directly relate to the ABX<sub>3</sub> perovskite archetype while a fourth is a perovskite-like lamellar structure with alternating Cs<sub>4</sub> and polyhedral Sn<sub>4</sub>I<sub><em>x</em></sub> layers. In ≈1.4 nm-diameter SWCNTs, CsPbBr<sub>3</sub> forms Cs<sub>3</sub>Pb<sup>II</sup>Br<sub>5</sub> nanowires, one ABX<sub>3</sub> unit cell in cross section with the Pb<sup>2+</sup> oxidation state maintained by ordered Cs<sup>+</sup> vacancies. Within ≈1.2 nm-diameter SWCNTs, CsPbBr<sub>3</sub> and CsSnI<sub>3</sub> form inorganic-polymer-like bilayer structures, one-fourth of an ABX<sub>3</sub> unit cell in cross section with systematically reproduced ABX<sub>3</sub> stoichiometry. Producing these smallest halide perovskite structures at their absolute synthetic cross-sectional limit enables quantum confinement effects with first-principles calculations demonstrating bandgap widening compared to corresponding bulk structural forms.</p>
first_indexed 2024-03-07T07:38:13Z
format Journal article
id oxford-uuid:997f357e-7734-4c4b-8c88-2d87d45113f3
institution University of Oxford
language English
last_indexed 2024-03-07T07:38:13Z
publishDate 2023
publisher Wiley
record_format dspace
spelling oxford-uuid:997f357e-7734-4c4b-8c88-2d87d45113f32023-03-30T11:43:03ZPicoperovskites: the smallest conceivable isolated halide perovskite structures formed within carbon nanotubesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:997f357e-7734-4c4b-8c88-2d87d45113f3EnglishSymplectic ElementsWiley2023Kashtiban, RJPatrick, CERamasse, QWalton, RISloan, J<p>Halide perovskite structures are revolutionizing the design of optoelectronic materials, including solar cells, light-emitting diodes, and photovoltaics when formed at the quantum scale. Four isolated sub-nanometer, or picoscale, halide perovskite structures formed inside ≈1.2–1.6 nm single-walled carbon nanotubes (SWCNTs) by melt insertion from CsPbBr<sub>3</sub> and lead-free CsSnI<sub>3</sub> are reported. Three directly relate to the ABX<sub>3</sub> perovskite archetype while a fourth is a perovskite-like lamellar structure with alternating Cs<sub>4</sub> and polyhedral Sn<sub>4</sub>I<sub><em>x</em></sub> layers. In ≈1.4 nm-diameter SWCNTs, CsPbBr<sub>3</sub> forms Cs<sub>3</sub>Pb<sup>II</sup>Br<sub>5</sub> nanowires, one ABX<sub>3</sub> unit cell in cross section with the Pb<sup>2+</sup> oxidation state maintained by ordered Cs<sup>+</sup> vacancies. Within ≈1.2 nm-diameter SWCNTs, CsPbBr<sub>3</sub> and CsSnI<sub>3</sub> form inorganic-polymer-like bilayer structures, one-fourth of an ABX<sub>3</sub> unit cell in cross section with systematically reproduced ABX<sub>3</sub> stoichiometry. Producing these smallest halide perovskite structures at their absolute synthetic cross-sectional limit enables quantum confinement effects with first-principles calculations demonstrating bandgap widening compared to corresponding bulk structural forms.</p>
spellingShingle Kashtiban, RJ
Patrick, CE
Ramasse, Q
Walton, RI
Sloan, J
Picoperovskites: the smallest conceivable isolated halide perovskite structures formed within carbon nanotubes
title Picoperovskites: the smallest conceivable isolated halide perovskite structures formed within carbon nanotubes
title_full Picoperovskites: the smallest conceivable isolated halide perovskite structures formed within carbon nanotubes
title_fullStr Picoperovskites: the smallest conceivable isolated halide perovskite structures formed within carbon nanotubes
title_full_unstemmed Picoperovskites: the smallest conceivable isolated halide perovskite structures formed within carbon nanotubes
title_short Picoperovskites: the smallest conceivable isolated halide perovskite structures formed within carbon nanotubes
title_sort picoperovskites the smallest conceivable isolated halide perovskite structures formed within carbon nanotubes
work_keys_str_mv AT kashtibanrj picoperovskitesthesmallestconceivableisolatedhalideperovskitestructuresformedwithincarbonnanotubes
AT patrickce picoperovskitesthesmallestconceivableisolatedhalideperovskitestructuresformedwithincarbonnanotubes
AT ramasseq picoperovskitesthesmallestconceivableisolatedhalideperovskitestructuresformedwithincarbonnanotubes
AT waltonri picoperovskitesthesmallestconceivableisolatedhalideperovskitestructuresformedwithincarbonnanotubes
AT sloanj picoperovskitesthesmallestconceivableisolatedhalideperovskitestructuresformedwithincarbonnanotubes