Publication date: 15th December 2025
This work focused on the synthesis and investigation of Fe3+ -doped Ba1-xLaxTi1-x/4O3 (BLT) ceramics with a perovskite-type ABO3 structure. An excess amount of Fe3+ donor dopant was introduced to partially replace Ti4+ ions in the BLT lattice, leading to materials with the general composition Ba1-xLaxTi1-yFeyO3 (BLTF), where x = 0.004 and y ranged from 0.001 to 0.004. The ceramics were fabricated via a conventional solid-state reaction route (MOM method) using simple oxide precursors, followed by consolidation through natural sintering. Thermal behavior of all ceramic powders was examined by TG/DTA and DTG techniques. The chemical composition of the BLTF powders was verified by energy-dispersive spectroscopy (EDS), while the microstructure of both powders and sintered ceramics was analyzed using scanning electron microscopy (SEM). EDS results confirmed that the intended chemical composition was achieved within an experimental uncertainty of approximately 3%. At room temperature (Tr < TC), the ceramics exhibited a single-phase tetragonal structure with the P4mm space group. Increasing iron content resulted in a slight reduction of the unit cell volume. Moreover, Fe incorporation led to a marked decrease in the maximum dielectric permittivity (εₘ) and shifted the ferroelectric–paraelectric phase transition temperature (TC) toward lower values. The BLTF solid solutions displayed a classical ferroelectric phase transition and low dielectric loss tangent (tg δ) both at ambient temperature and near the transition region. Based on dielectric measurements, the Curie–Weiss temperature (T0) and Curie constant (C) were determined. Finally, analysis of the temperature dependence of DC electrical conductivity indicated the occurrence of a positive temperature coefficient of resistivity (PTCR) effect in the vicinity of the phase transition.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.