Crystal growth, structural phase transitions and optical gap evolution of FAPb(Br1-x Cl x )3 hybrid perovskites (FA: formamidinium ion, CH(NH2)2 +)
Abstract Chemically tuned organic–inorganic hybrid halide perovskites based on bromide and chloride anions CH(NH2)2Pb(Br1−x Cl x )3 (CH(NH2)2 +: formamidinium ion, FA) have been crystallized and investigated by neutron powder diffraction (NPD), single crystal X-ray diffraction (SCXRD), scanning elec...
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Springer
2025-01-01
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| Series: | Discover Nano |
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| Online Access: | https://doi.org/10.1186/s11671-024-04179-2 |
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| author | Carlos A. López Oscar Fabelo Carmen Abia María T. Fernández-Diaz José A. Alonso |
| author_facet | Carlos A. López Oscar Fabelo Carmen Abia María T. Fernández-Diaz José A. Alonso |
| author_sort | Carlos A. López |
| collection | DOAJ |
| description | Abstract Chemically tuned organic–inorganic hybrid halide perovskites based on bromide and chloride anions CH(NH2)2Pb(Br1−x Cl x )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-x Cl x )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. |
| format | Article |
| id | doaj-art-83b27953961f47a6903ef8e0b6dae74b |
| institution | Kabale University |
| issn | 2731-9229 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Springer |
| record_format | Article |
| series | Discover Nano |
| spelling | doaj-art-83b27953961f47a6903ef8e0b6dae74b2025-01-19T12:36:17ZengSpringerDiscover Nano2731-92292025-01-0120111410.1186/s11671-024-04179-2Crystal growth, structural phase transitions and optical gap evolution of FAPb(Br1-x Cl x )3 hybrid perovskites (FA: formamidinium ion, CH(NH2)2 +)Carlos A. López0Oscar Fabelo1Carmen Abia2María T. Fernández-Diaz3José A. Alonso4Instituto de Ciencia de Materiales de Madrid, CSICInstitut Laue LangevinInstituto de Ciencia de Materiales de Madrid, CSICInstituto de Ciencia de Materiales de Madrid, CSICInstituto de Ciencia de Materiales de Madrid, CSICAbstract Chemically tuned organic–inorganic hybrid halide perovskites based on bromide and chloride anions CH(NH2)2Pb(Br1−x Cl x )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-x Cl x )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.https://doi.org/10.1186/s11671-024-04179-2FAPbBr3FAPbCl3Neutron diffractionHybrid perovskiteMixed halideBromine |
| spellingShingle | Carlos A. López Oscar Fabelo Carmen Abia María T. Fernández-Diaz José A. Alonso Crystal growth, structural phase transitions and optical gap evolution of FAPb(Br1-x Cl x )3 hybrid perovskites (FA: formamidinium ion, CH(NH2)2 +) Discover Nano FAPbBr3 FAPbCl3 Neutron diffraction Hybrid perovskite Mixed halide Bromine |
| title | Crystal growth, structural phase transitions and optical gap evolution of FAPb(Br1-x Cl x )3 hybrid perovskites (FA: formamidinium ion, CH(NH2)2 +) |
| title_full | Crystal growth, structural phase transitions and optical gap evolution of FAPb(Br1-x Cl x )3 hybrid perovskites (FA: formamidinium ion, CH(NH2)2 +) |
| title_fullStr | Crystal growth, structural phase transitions and optical gap evolution of FAPb(Br1-x Cl x )3 hybrid perovskites (FA: formamidinium ion, CH(NH2)2 +) |
| title_full_unstemmed | Crystal growth, structural phase transitions and optical gap evolution of FAPb(Br1-x Cl x )3 hybrid perovskites (FA: formamidinium ion, CH(NH2)2 +) |
| title_short | Crystal growth, structural phase transitions and optical gap evolution of FAPb(Br1-x Cl x )3 hybrid perovskites (FA: formamidinium ion, CH(NH2)2 +) |
| title_sort | crystal growth structural phase transitions and optical gap evolution of fapb br1 x cl x 3 hybrid perovskites fa formamidinium ion ch nh2 2 |
| topic | FAPbBr3 FAPbCl3 Neutron diffraction Hybrid perovskite Mixed halide Bromine |
| url | https://doi.org/10.1186/s11671-024-04179-2 |
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