Carlos A. López, Oscar Fabelo, Carmen Abia, María T. Fernández-Diaz, José A. Alonso
{"title":"FAPb(Br1-xClx)3混合包晶的晶体生长、结构相变和光隙演化（FA：甲脒离子，CH(NH2)2+）。","authors":"Carlos A. López, Oscar Fabelo, Carmen Abia, María T. Fernández-Diaz, José A. Alonso","doi":"10.1186/s11671-024-04179-2","DOIUrl":null,"url":null,"abstract":"<div><p>Chemically tuned organic–inorganic hybrid halide perovskites based on bromide and chloride anions CH(NH<sub>2</sub>)<sub>2</sub>Pb(Br<sub>1−<i>x</i></sub>Cl<sub><i>x</i></sub>)<sub>3</sub> (CH(NH<sub>2</sub>)<sub>2</sub><sup>+</sup>: formamidinium ion, FA) have been crystallized and investigated by neutron powder diffraction (NPD), single crystal X-ray diffraction (SCXRD), scanning electron microscopy (SEM) and UV–vis spectroscopy. FAPbBr<sub>3</sub> and FAPbCl<sub>3</sub> experience successive phase transitions upon cooling, lowering the symmetry from cubic to orthorhombic phases; however, these transitions are not observed for the mixed halide phases, probably due to compositional disorder. The band-gap engineering brought about by the chemical doping of FAPb (Br<sub>1-<i>x</i></sub>Cl<sub><i>x</i></sub>)<sub>3</sub> perovskites (x = 0.0, 0.33, 0.5, 0.66 and 1.0) can be controllably tuned: the gap progressively increases with the concentration of Cl<sup>−</sup> ions from 2.17 to 2.91 eV at room temperature, presenting a nonlinear behavior. This study provides an improved understanding of the structural and optical properties of these appealing hybrid perovskites.</p></div>","PeriodicalId":51136,"journal":{"name":"Nanoscale Research Letters","volume":"20 1","pages":""},"PeriodicalIF":5.5000,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1186/s11671-024-04179-2.pdf","citationCount":"0","resultStr":"{\"title\":\"Crystal growth, structural phase transitions and optical gap evolution of FAPb(Br1-xClx)3 hybrid perovskites (FA: formamidinium ion, CH(NH2)2+)\",\"authors\":\"Carlos A. López, Oscar Fabelo, Carmen Abia, María T. Fernández-Diaz, José A. Alonso\",\"doi\":\"10.1186/s11671-024-04179-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Chemically tuned organic–inorganic hybrid halide perovskites based on bromide and chloride anions CH(NH<sub>2</sub>)<sub>2</sub>Pb(Br<sub>1−<i>x</i></sub>Cl<sub><i>x</i></sub>)<sub>3</sub> (CH(NH<sub>2</sub>)<sub>2</sub><sup>+</sup>: formamidinium ion, FA) have been crystallized and investigated by neutron powder diffraction (NPD), single crystal X-ray diffraction (SCXRD), scanning electron microscopy (SEM) and UV–vis spectroscopy. FAPbBr<sub>3</sub> and FAPbCl<sub>3</sub> experience successive phase transitions upon cooling, lowering the symmetry from cubic to orthorhombic phases; however, these transitions are not observed for the mixed halide phases, probably due to compositional disorder. The band-gap engineering brought about by the chemical doping of FAPb (Br<sub>1-<i>x</i></sub>Cl<sub><i>x</i></sub>)<sub>3</sub> perovskites (x = 0.0, 0.33, 0.5, 0.66 and 1.0) can be controllably tuned: the gap progressively increases with the concentration of Cl<sup>−</sup> ions from 2.17 to 2.91 eV at room temperature, presenting a nonlinear behavior. This study provides an improved understanding of the structural and optical properties of these appealing hybrid perovskites.</p></div>\",\"PeriodicalId\":51136,\"journal\":{\"name\":\"Nanoscale Research Letters\",\"volume\":\"20 1\",\"pages\":\"\"},\"PeriodicalIF\":5.5000,\"publicationDate\":\"2025-01-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1186/s11671-024-04179-2.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nanoscale Research Letters\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1186/s11671-024-04179-2\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nanoscale Research Letters","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1186/s11671-024-04179-2","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Crystal growth, structural phase transitions and optical gap evolution of FAPb(Br1-xClx)3 hybrid perovskites (FA: formamidinium ion, CH(NH2)2+)
Chemically tuned organic–inorganic hybrid halide perovskites based on bromide and chloride anions CH(NH2)2Pb(Br1−xClx)3 (CH(NH2)2+: formamidinium ion, FA) have been crystallized and investigated by neutron powder diffraction (NPD), single crystal X-ray diffraction (SCXRD), scanning electron microscopy (SEM) and UV–vis spectroscopy. FAPbBr3 and FAPbCl3 experience successive phase transitions upon cooling, lowering the symmetry from cubic to orthorhombic phases; however, these transitions are not observed for the mixed halide phases, probably due to compositional disorder. The band-gap engineering brought about by the chemical doping of FAPb (Br1-xClx)3 perovskites (x = 0.0, 0.33, 0.5, 0.66 and 1.0) can be controllably tuned: the gap progressively increases with the concentration of Cl− ions from 2.17 to 2.91 eV at room temperature, presenting a nonlinear behavior. This study provides an improved understanding of the structural and optical properties of these appealing hybrid perovskites.
期刊介绍：
Nanoscale Research Letters (NRL) provides an interdisciplinary forum for communication of scientific and technological advances in the creation and use of objects at the nanometer scale. NRL is the first nanotechnology journal from a major publisher to be published with Open Access.
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