{"title":"锑基二维卤化物双钙钛矿的方向和温度依赖性质。","authors":"Shubham Ajaykumar Rajput,Sudhadevi Antharjanam,Aravind Kumar Chandiran","doi":"10.1021/acs.inorgchem.5c02365","DOIUrl":null,"url":null,"abstract":"Two-dimensional (2D) organic-inorganic halide double perovskites have attracted wide attention due to their structural diversity and chemical tunability. Herein, we report a new 2D layered halide double perovskite material, (BrPA)4AgSbBr8 (BPAS), and its properties are compared with (BrPA)4AgInBr8 (BPAIn, PA─propylammonium) and previously reported noncentrosymmetric Cl0.26Br3.74PA4AgSbBr8 (CPAS, CPA─chloropropylammonium). BPAS and BPAIn crystallize in the P2/c monoclinic space group with 2D layers of inorganic octahedra formed by monovalent and trivalent cations separated by two layers of organic linkers. Unlike their 3D counterparts, Cs2Ag(In/Sb)X6 (X-halide), the octahedra are distorted, reducing their symmetry. This led to the broadening of the optical gap in the present materials and also affected the photoluminescence (PL) and conduction properties. The BPAS shows a slight indirect band gap but shows PL emission with contributions from band-to-band, free/bound excitonic, and self-trapped excitonic states. The STEs enabled broader emission in these two materials. The 2D nature of the material shows anisotropic conduction properties where the in-plane conduction is found to be different from out-of-plane conduction. The value of charge transfer resistance decreases from GΩ (at -73 °C) to kΩ (at 202 °C) due to the presence of thermally activated carrier mobility through a correlated barrier hopping mechanism.","PeriodicalId":40,"journal":{"name":"Inorganic Chemistry","volume":"27 1","pages":""},"PeriodicalIF":4.3000,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Direction and Temperature-Dependent Properties of an Antimony-Based Two-Dimensional Halide Double Perovskite.\",\"authors\":\"Shubham Ajaykumar Rajput,Sudhadevi Antharjanam,Aravind Kumar Chandiran\",\"doi\":\"10.1021/acs.inorgchem.5c02365\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Two-dimensional (2D) organic-inorganic halide double perovskites have attracted wide attention due to their structural diversity and chemical tunability. Herein, we report a new 2D layered halide double perovskite material, (BrPA)4AgSbBr8 (BPAS), and its properties are compared with (BrPA)4AgInBr8 (BPAIn, PA─propylammonium) and previously reported noncentrosymmetric Cl0.26Br3.74PA4AgSbBr8 (CPAS, CPA─chloropropylammonium). BPAS and BPAIn crystallize in the P2/c monoclinic space group with 2D layers of inorganic octahedra formed by monovalent and trivalent cations separated by two layers of organic linkers. Unlike their 3D counterparts, Cs2Ag(In/Sb)X6 (X-halide), the octahedra are distorted, reducing their symmetry. This led to the broadening of the optical gap in the present materials and also affected the photoluminescence (PL) and conduction properties. The BPAS shows a slight indirect band gap but shows PL emission with contributions from band-to-band, free/bound excitonic, and self-trapped excitonic states. The STEs enabled broader emission in these two materials. The 2D nature of the material shows anisotropic conduction properties where the in-plane conduction is found to be different from out-of-plane conduction. The value of charge transfer resistance decreases from GΩ (at -73 °C) to kΩ (at 202 °C) due to the presence of thermally activated carrier mobility through a correlated barrier hopping mechanism.\",\"PeriodicalId\":40,\"journal\":{\"name\":\"Inorganic Chemistry\",\"volume\":\"27 1\",\"pages\":\"\"},\"PeriodicalIF\":4.3000,\"publicationDate\":\"2025-06-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Inorganic Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.1021/acs.inorgchem.5c02365\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, INORGANIC & NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Inorganic Chemistry","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acs.inorgchem.5c02365","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
Direction and Temperature-Dependent Properties of an Antimony-Based Two-Dimensional Halide Double Perovskite.
Two-dimensional (2D) organic-inorganic halide double perovskites have attracted wide attention due to their structural diversity and chemical tunability. Herein, we report a new 2D layered halide double perovskite material, (BrPA)4AgSbBr8 (BPAS), and its properties are compared with (BrPA)4AgInBr8 (BPAIn, PA─propylammonium) and previously reported noncentrosymmetric Cl0.26Br3.74PA4AgSbBr8 (CPAS, CPA─chloropropylammonium). BPAS and BPAIn crystallize in the P2/c monoclinic space group with 2D layers of inorganic octahedra formed by monovalent and trivalent cations separated by two layers of organic linkers. Unlike their 3D counterparts, Cs2Ag(In/Sb)X6 (X-halide), the octahedra are distorted, reducing their symmetry. This led to the broadening of the optical gap in the present materials and also affected the photoluminescence (PL) and conduction properties. The BPAS shows a slight indirect band gap but shows PL emission with contributions from band-to-band, free/bound excitonic, and self-trapped excitonic states. The STEs enabled broader emission in these two materials. The 2D nature of the material shows anisotropic conduction properties where the in-plane conduction is found to be different from out-of-plane conduction. The value of charge transfer resistance decreases from GΩ (at -73 °C) to kΩ (at 202 °C) due to the presence of thermally activated carrier mobility through a correlated barrier hopping mechanism.
期刊介绍:
Inorganic Chemistry publishes fundamental studies in all phases of inorganic chemistry. Coverage includes experimental and theoretical reports on quantitative studies of structure and thermodynamics, kinetics, mechanisms of inorganic reactions, bioinorganic chemistry, and relevant aspects of organometallic chemistry, solid-state phenomena, and chemical bonding theory. Emphasis is placed on the synthesis, structure, thermodynamics, reactivity, spectroscopy, and bonding properties of significant new and known compounds.