Registration Number
0225U002802,
(0124U001485)
, R & D reports
Title
Hybrid organic-inorganic metal halide perovskites as advanced functional materials
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Синтез перовськітів.
Head
Huralskyi Illia O., Доктор хімічних наук
Registration Date
04-04-2025
Organization
Taras Shevchenko National University of Kyiv
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The purpose of this project is to obtain new hybrid organic-inorganic perovskites, to investigate their optical and electrical properties, to establish correlations between the composition, structure, and physicochemical properties of 3D hybrid perovskites, as well as to obtain nanomaterials and composites based on them.
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Hybrid organic-inorganic perovskites are among the most promising materials in modern chemistry and materials science. Due to their unique physicochemical properties, such as high light absorption coefficients, tunable bandgap widths, and relatively simple synthesis technology, these materials find applications in optoelectronics, photovoltaics, LEDs, lasers, and photodetectors. In this study, new types of hybrid perovskites with unique characteristics were developed, demonstrating significant potential for further use in various high-tech industries. As part of the research, a series of three-dimensional mixed-halide aziridinium perovskites were synthesized. It was established that the resulting compounds have cubic structure, with aziridinium cations playing a key role in stabilizing this three-dimensional framework. X-ray diffraction analysis confirmed that the lattice parameter of the material changes linearly with increasing bromine content, consistent with Vegard's empirical law. Additionally, the studies revealed that iodine has a preferential incorporation into the perovskite structure. A significant finding is the linear dependence of the bandgap width on bromine content. The bandgap was found to vary from 1.57 eV at low bromine content (χBr = 0.07) to 2.23 eV at high bromine content (χBr = 2.68). Furthermore, a new 2D hybrid perovskite based on ethylammonium cation EA₂CdBr₄ was synthesized. This material has a two-dimensional structure comprising inorganic layers separated by organic ethylammonium cations. It is characterized by a wide bandgap and bright blue-violet luminescence at low temperatures. The results of this study open new avenues for the development of functional materials that can be utilized in LEDs, lasers, photodetectors, and solar cells.
Product Description
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Naumova Dina D.
Pavlenko Vadym O.
Partsevska Sofiia V.
Sirenko Valerii Yu.
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2025-04-04
