Rare earth doped silver tungstate for photoluminescent applications

Autor(es)

Pinatti, Ivo M. ^[1] ; Pereira, Paula F. S. ^[1] ; de Assis, Marcelo ^[1] ; Longo, Elson ^[1] ; Rosa, Ieda L. V. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, LIEC, CDMF, POB 676, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Alloys and Compounds; v. 771, p. 433-447, JAN 15 2019.
• Citações Web of Science: 8

Resumo

Luminescent materials of different emission colors are of great interest for development of new or more efficient optical devices. Although many materials have been reported using different approach, green synthesis and nanosized rare earth doped phosphors of high color rendering is still very limited. This paper describes the structural and luminescence properties of different rare earth doped alpha-Ag2WO4. The nanophosphors alpha- (Ag1.97RE0.01)WO4 (RE = Pr, Sm, Eu, Tb, Dy and Tm) were prepared using a simple, fast and cheap coprecipitation methodology. The results revealed that the samples have single phase with orthorhombic symmetry of Pn2n space group. X-ray Photoelectron Spectroscopy (XPS) properties of these phosphors are characterized for the first time. The phosphors show their characteristic emission colors under ultraviolet excitation due to the efficient energy transfer from WO42- group to rare earth ions. Also, the alpha-(Ag1.97RE0.01)WO4 system offers the possibility of color tuning by changing only the RE3+ dopant instead of altering the host. The photoluminescence properties show the suitability of these inorganic phosphors for solid-state lighting optical devices and for biological applications due to the low toxicity of silver compounds. (C) 2018 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 13/23995-8 - Síntese do Tungstato de Prata dopado com o Eu3+ e estudo das suas propriedades ópticas, fotoluminescentes e fotocatalíticas
• Beneficiário: Ivo Mateus Pinatti
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs