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However, the Pb-content in the crystal structure and instability issues have raised questions about the industrialization of these materials. Bi and Sb are widely considered as an alternative on the B-site due to their isoelectronic configuration with the Pb divalent cation. Herein, we report four novel Pb-free azetidinium metal halides and present their fundamental material properties: [(CH<jats:sub>2<\/jats:sub>)<jats:sub>3<\/jats:sub>NH<jats:sub>2<\/jats:sub>]<jats:sub>2<\/jats:sub>AgBiBr<jats:sub>6<\/jats:sub>, [(CH<jats:sub>2<\/jats:sub>)<jats:sub>3<\/jats:sub>NH<jats:sub>2<\/jats:sub>]<jats:sub>3<\/jats:sub>Bi<jats:sub>2<\/jats:sub>I<jats:sub>9<\/jats:sub>, [(CH<jats:sub>2<\/jats:sub>)<jats:sub>3<\/jats:sub>NH<jats:sub>2<\/jats:sub>]<jats:sub>3<\/jats:sub>Bi<jats:sub>2<\/jats:sub>Br<jats:sub>9<\/jats:sub>, and [(CH<jats:sub>2<\/jats:sub>)<jats:sub>3<\/jats:sub>NH<jats:sub>2<\/jats:sub>]<jats:sub>3<\/jats:sub>Bi<jats:sub>2<\/jats:sub>Cl<jats:sub>9<\/jats:sub>. Our materials have a low-dimensional perovskite-like structure from 0 to 2D, where the replacement on the B-site is based on Ag<jats:sup>+<\/jats:sup>\/Bi<jats:sup>3+<\/jats:sup> and Bi<jats:sup>3+<\/jats:sup>.<\/jats:p>\n          <jats:p>\n            <jats:bold>Graphical Abstract<\/jats:bold>\n          <\/jats:p>\n          <jats:p>As a potential light absorber, four different azetidinium metal halides were successfully synthesized <jats:italic>via<\/jats:italic> evaporation. The polycrystalline powders and thin films of the azetidinium metal halides present low dimensionalities from 0 to 2D.<\/jats:p>","DOI":"10.1557\/s43579-025-00735-8","type":"journal-article","created":{"date-parts":[[2025,5,14]],"date-time":"2025-05-14T12:06:05Z","timestamp":1747224365000},"page":"560-565","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Low-dimensional hybrid lead-free azetidinium metal halides"],"prefix":"10.1557","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3430-8332","authenticated-orcid":false,"given":"Young Un","family":"Jin","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3769-3595","authenticated-orcid":false,"given":"Bernd","family":"Marler","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5386-0280","authenticated-orcid":false,"given":"Andrei N.","family":"Salak","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5780-4849","authenticated-orcid":false,"given":"Marianela Escobar","family":"Castillo","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2632-4826","authenticated-orcid":false,"given":"Niels","family":"Benson","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6895-1334","authenticated-orcid":false,"given":"Doru C.","family":"Lupascu","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2025,5,14]]},"reference":[{"key":"735_CR1","doi-asserted-by":"publisher","first-page":"6050","DOI":"10.1021\/ja809598r","volume":"131","author":"A Kojima","year":"2009","unstructured":"A. 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