Precise Control of Halogen Distribution in Monolayer Hybrid Perovskites through Mechanochemistry
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Le résumé fourni par la source
Mixed-halide three-dimensional perovskites have been extensively studied due to their ability to exhibit continuously tunable emissions in the visible spectrum accompanied by spectral broadening. However, understanding the relationship between the spectral characteristics of mixed-halide perovskites and the distribution of halogens at the individual octahedral levels remains a significant challenge. This study successfully realized single-layer mixed-halide perovskites (A 2 PbI 2 Cl 2 ) (A = C 12 H 25 NH 3 + ) with a uniform distribution of halogens in the Pb octahedra by employing mechanochemical strategies. The absorption spectra of the prepared samples exhibited a constant absorption peak at 476 nm under different balling times, indicating formation of a uniform product. Structural characterization is further elucidated by X-ray photoelectron spectroscopy measurements and corroborated by X-ray diffraction results. Similarly, single-layer mixed-halides A 2 PbI 2 Br 2 and A 2 PbI 2 SCN 2, exhibiting constantly absorption peak of 450 and 523 nm, respectively, during the reaction, were obtained by employment of different halogens via this synthetic technique. The versatility of the synthetic strategy was further demonstrated by synthesizing mixed-halide A 2 ′PbI 2 Cl 2 perovskites by substituting a primary amine salt with a quaternary ammonium salt (A′ = C 15 H 34 N + ). Ultimately, these mixed halides exhibit tunable emission spectra ranging from 340 to 530 nm by varying both amine and halogen composition/distribution within the Pb octahedral. This atomic-scale insight lays the foundation for further investigations of the optoelectronic properties of mixed-halide perovskites.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Precise Control of Halogen Distribution in Monolayer Hybrid Perovskites through Mechanochemistry
- Date Crossref
- 21/02/2025
- Éditeur
- American Chemical Society (ACS)
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Jilin University State Key Laboratory of Inorganic Synthesis and Preparative Chemistry pays non établi dans la noticeUniversité ou école supérieure
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Jilin Medical University pays non établi dans la noticeUniversité ou école supérieure
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State Key Laboratory of Inorganic Synthesis and Preparative Chemistry pays non établi dans la noticeStructure de recherche
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Henan University Engineering Center for Nanomaterials pays non établi dans la noticeUniversité ou école supérieure
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Nanomaterials Research (United States) pays non établi dans la noticeEntreprise
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Engineering Center for Nanomaterials pays non établi dans la noticeInstitution
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry — Jilin University, Jilin Medical University et State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.