Non-hydrolytic Sol-Gel Route: a Powerful Process to Develop UV-Vis-IR Luminescent YVO4 Phosphors

Autor(es)

Ferreira, Maria Fernanda ^[1] ; Pedroso de Andrade, Filipy Henrique ^[1] ; Granito, Camila Jorente ^[1] ; Nascimento Melo, Willian Euripedes ^[1] ; de Faria, Emerson Henrique ^[1] ; Ciuffi, Katia Jorge ^[1] ; Rocha, Lucas Alonso ^[1] ; Nassar, Eduardo Jose ^[1]

Afiliação do(s) autor(es)

^[1] Univ Franca, Av Dr Armando Salles Oliveira, 201 Pq Univ, BR-14404600 Franca, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Fluorescence; v. 30, n. 4 MAY 2020.
• Citações Web of Science: 0

Resumo

The spectroscopic properties of lanthanide ions stem from absorption and emission radiation in the solar spectrum range, which promotes numerous applications in areas such as white light emission, bio-imaging, biological markers, and photovoltaic cells, among others. To intensify these properties, several matrixes have been studied, particularly the yttrium vanadate matrix due to its structural, mechanic, and physicochemical properties. The non-hydrolytic sol-gel process is a versatile way to prepare inorganic oxides doped with lanthanide ions. In this work, we describe the synthesis of yttrium vanadate matrixes doped with Eu3+, Er3+, and/or Yb3+ ions (containing 1% lanthanide ions with respect to Y3+ (molar ratio)) by the non-hydrolytic sol-gel, annealed at 800 degrees C for 4 h, and their characterization by X-ray diffraction and photoluminescence spectroscopy. The X-ray diffraction patterns display the peaks corresponding to the yttrium vanadate tetragonal phase. Laser excitation at 980 nm elicits Er3+ emission bands in the green and red regions and Eu3+ emission at 620 nm. Laser excitation at 322 nm; i.e., the charge transfer band, provides emission in the same regions, as well as infrared emission. This system is a promising candidate for applications in solar cells, optical amplifiers, and biomarkers because it can be excited at different wavelengths. {[}GRAPHICS] . (AU)

• Processo FAPESP: 15/20298-0 - Obtenção de matrizes luminescentes de LaNbO4:Ln (Ln = Dy, TM, er e Yb) pelo processo de pirólise de aerossol
• Beneficiário: Lucas Alonso Rocha
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/02641-0 - 6th Nano Today Conference
• Beneficiário: Eduardo José Nassar
• Modalidade de apoio: Auxílio à Pesquisa - Reunião - Exterior