Publication date: 22nd July 2026
The present study reports the morphological, structural, and luminescent characterization of Eu³⁺- and Tb³⁺-doped CaAl₂Si₂O₈ feldspar synthesized by the sol–gel method and subsequently subjected to heat treatments in the temperature range of 500–1100 °C. Structural characterization was performed by SEM using compositional contrast analysis to evaluate the morphology, microstructure, and elemental distribution of the materials. X-ray diffraction analysis revealed the formation of the anorthite crystalline phase with triclinic symmetry in the P-1 space group, according to the ICDD reference card 00-012-0301.
Photoluminescence measurements were carried out at room temperature. For the CaAl₂Si₂O₈:Eu³⁺ system, the most intense emission was observed at 616 nm, corresponding to the characteristic ⁵D₀ → ⁷F₂ transition, under excitation wavelengths of 272 nm associated with the charge transfer band and 393 nm corresponding to the f–f transition. The emission coordinates obtained in the CIE chromaticity diagram were in the red region.
In the case of CaAl₂Si₂O₈:Tb³⁺, the highest emission intensity was recorded at 544 nm under excitation wavelengths of 233 nm, related to the charge transfer band, and 375 nm corresponding to the f–f transition. The observed emissions were associated with the ⁵D₄ → ⁷F₆ and ⁵D₄ → ⁷F₅ transitions, respectively. The emission coordinates obtained from the CIE chromaticity diagram were in the green region.
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.