Study and characterization of luminescent ceramic based on Nb2O5: Ln3+ (Ln = La, Tm and Eu) obtained by the Non Hydrolytic Sol-Gel process.

• Grant number: 15/22087-6
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: April 01, 2016
• End date: December 31, 2017
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Lucas Alonso Rocha
• Grantee: Susane Bonamin Moscardini
• Host Institution: Pró-Reitoria Adjunta de Pesquisa e Pós-Graduação. Universidade de Franca (UNIFRAN). Franca , SP, Brazil

Abstract

White light emitters in the solid state (LED) are considered as the next generation of light sources in the solid state, for generating white light from red phosphors, green and blue (RGB), for replacing incandescent and fluorescent bulbs currently used due to its advantages such as long lifetime, low energy consumption and environmental issues. The development of new processes and the search for new materials is important to obtain phosphors that can absorb radiation efficiently in the ultraviolet range and having adequate emission and stability. Among the many existing methodologies for the synthesis of phosphors, the Sol-Gel process stands out as one of the most advantageous for its speed and the purity of the final product. In this project, ceramic based on niobia doped with La3+, Tm3+ and Eu3+ ions will be prepared by the Non Hydrolytic Sol-Gel process to investigate the correlation between the concentration of Ln3+ ions in the structural, morphological and spectroscopic properties, thus providing the production of more efficient phosphors. The matrices prepared will be investigated through electronic scanning microscopy (SEM), which aims to verify the morphology and particle size. Other information will be obtained through the techniques of X-ray diffraction (XRD) and luminescence spectroscopy (excitation, absorption and emission) and vibrational spectroscopy (FTIR).

Scientific publications

(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)

MICHEL L. DE SOUZA; SUSANE B. MOSCARDINI; EMERSON H. DE FARIA; KATIA J. CIUFFI; LUCAS A. ROCHA; EDUARDO J. NASSAR; JORGE V. L. SILVA; MARCELO F. OLIVEIRA; IZAQUE A. MAIA. . Química Nova, v. 41, n. 5, p. 519-527, 2018-05-00. (15/22087-6, 15/20298-0)