Advanced search
Start date
Betweenand

Development of MI2MIISn3O8 and MI1.6MII1.6Sn2.8O8 stannate materials doped with rare earth ions with persistent luminescence emission

Grant number: 20/10228-2
Support type:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): November 01, 2020
Effective date (End): October 31, 2024
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
Principal researcher:Hermi Felinto de Brito
Grantee:Matheus Salgado de Nichile Saula
Home Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The rare earth ions (TR3+) have intrinsic optical and chemical properties, mainly due to their intraconfigurational electronic transitions 4f-4f that lead to thin bands of absorption and emission. These spectroscopic characteristics result in their application in lasers, bioimaging for medical diagnostics, LEDs, security systems, luminescent inks, anti-counterfeiting labels, thermometric sensors, etc. Materials doped with TR3+ ions that exhibit the phenomenon of persistent luminescence are capable of emitting light for up to more than 24 hours after the excitation ceases. In particular, materials with persistent luminescence in the Near Infrared (NIR) region have been attracting attention for applications in the areas of biological mapping, photodynamic therapies and medical diagnoses, since this emission corresponds to the spectral region with the highest transmittance in biological tissues. However, most of the materials that present the phenomenon of persistent luminescence in the NIR use matrices of gallium and germanium with high production cost. In this sense, materials containing stannate matrices (MI2MIISn3O8 and MI1,6MII1,6Sn2,8O8) doped with TR3+ ions are economically more attractive and also have a high application potential. Thus, this research proposal aims to synthesize and characterize MI2MIISn3O8: TR3 + and MI1.6MII1.6Sn2.8O8 stannate-based materials: TR3+ (MI: Li, Na and K; MII: Mg, Ca, Sr, Ba, Zn and Cd; TR3 +: from Ce to Yb) to investigate their photoluminescent properties. Therefore, the project seeks to develop the mechanisms of persistent luminescence of these materials aiming at possible applications as photonic devices (for example, in the NIR region). (AU)

News published in Agência FAPESP Newsletter about the scholarship:
Articles published in other media outlets (0 total):
More itemsLess items
VEICULO: TITULO (DATA)
VEICULO: TITULO (DATA)