A5072598691- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Solid-state spectroscopy and crystallography
- Perovskite Materials and Applications
- Organic and Molecular Conductors Research
- Luminescence Properties of Advanced Materials
- Photorefractive and Nonlinear Optics
- Solid State Laser Technologies
- biodegradable polymer synthesis and properties
- Nanocomposite Films for Food Packaging
- Luminescence and Fluorescent Materials
- Conducting polymers and applications
- Electrospun Nanofibers in Biomedical Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Nonlinear Optical Materials Research
- Crystal structures of chemical compounds
- Glass properties and applications
Polish Academy of Sciences
2022-2025
Włodzimierz Trzebiatowski Institute of Low Temperature and Structure Research
2023-2024
Hybrid organic-inorganic lead halide perovskites have emerged as promising materials for various applications, including solar cells, light-emitting devices, dielectrics, and optical switches. In this work, we report the synthesis, crystal structures, linear nonlinear well dielectric properties of three imidazolium bromides, IMPbBr3, IM2PbBr4, IM3PbBr5 (IM+ = imidazolium). We show that these compounds exhibit distinct structure types. IMPbBr3 crystallizes in 4H-hexagonal perovskite with...
Layered hybrid organic–inorganic lead halides have gained a lot of attention for optoelectronic applications. A notable subset within this category is perovskites comprising halogenated amines since they may exhibit reduced band gap or polar order. We synthesized three compounds 2-chloroethylammonium (CEA+) cations, with the chemical formula CEA2PbX4 (X = Cl, Br, I). X-ray diffraction studies show that at room temperature (RT), CEA2PbBr4 and CEA2PbI4 crystallize in Pbnm symmetry, ordered...
Layered 1,2,4-triazolium lead chloride undergoes three phase transitions. It also exhibits narrow and broad emissions, which exhibit different temperature dependence. We correlated this behaviour with the change of octahedral distortion.
Mixing of molecular cations in hybrid lead halide perovskites is used to effectively tune the stability and performance photovoltaic devices based on these compounds. Upon introduction bulky such as ethylenediammonium (EN), perovskite framework becomes locally broken resulting so-called hollow perovskites. Here, we use a set different experimental techniques probe structural phase transitions, cation dynamics, dielectric response methylammonium-based MA1–xENxPb1–0.7xI3–0.4x containing...
Multilayered Ruddlesden–Popper hybrid lead halide perovskites are an emerging class of soft that exhibit exceptional linear and nonlinear optical properties as well ferroelectric antiferroelectric characteristics. Due to these features, they show immense potential in energy conversion, storage, light emission, photodetector technologies. The structural phase transitions lattice dynamics organic cations play key roles the performance perovskites. Herein, we report studies two bromide –...
Membranes produced by crosslinking chitosan with magnesium phytate were prepared using highly deacetylated and its N-carboxymethyl, O-carboxymethyl N,O-carboxymethyl derivatives. The conditions of the membrane production described. IR, Raman, electron absorption emission spectra measured analyzed for all substrates. It was found that derivative is most effectively crosslinked phytate, films formed on this substrate exhibit good mechanical parameters strength, resistance stability. Strong...
Hybrid lead iodide perovskites are promising photovoltaic and light-emitting materials. Extant literature data on the key optoelectronic luminescent properties of hybrid indicate that these affected by electron–phonon coupling, dynamics organic cations, degree lattice distortion. We report temperature-dependent Raman studies BA2MAPb2I7 BA2MA2Pb3I10 (BA = butylammonium; MA methylammonium), which undergo two structural phase transitions. obtained in broad temperature (360–80 K) wavenumber...
The physicochemical characteristics of a zero-dimensional (0D) hybrid organic–inorganic bismuth bromide templated by 2-bromoethylammonium cations (BEA)3BiBr6 are investigated. Single-crystal X-ray diffraction data showed that the examined material crystallizes in triclinic P1̅ structure at room temperature with organic cation partial disorder involving one three independent BEA+ types. crystal undergoes first-order structural phase transition during cooling (256 K) to completely ordered...