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...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
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Wiley
2023
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| _version_ | 1826309602919055360 |
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| 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 |
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