Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Photoluminescence of Ag+ and Agmn+ in co-doped Pr3+/Yb3+ fluorophosphate glasses: tuning visible emission and energy transfer to Pr3+/Yb3+ ions through excitation in different silver species

Texto completo
Autor(es):
Castro, Tarcio [1, 2] ; Jubera, Veronique [1] ; Fares, Hssen [1, 2] ; Petit, Yannick [1, 3] ; Fargues, Alexandre [1] ; Cardinal, Thierry [1] ; Nalin, Marcelo [2] ; Ribeiro, Sidney [2]
Número total de Autores: 8
Afiliação do(s) autor(es):
[1] Univ Bordeaux, CNRS, ICMCB, UPR 9048, 87 Ave Dr A Schweitzer, F-33608 Pessac - France
[2] Sao Paulo State Univ UNESP, Inst Chem, CP 355, BR-14800060 Araraquara, SP - Brazil
[3] Univ Bordeaux, CNRS, CEA, CELIA, UMR 5107, 351 Cours Liberat, F-33405 Talene - France
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS; v. 30, n. 18, SI, p. 16878-16885, SEP 2019.
Citações Web of Science: 0
Resumo

Here, we report the luminescence properties of Yb3+/Pr3+ dual-doped fluorophosphate glasses containing silver clusters. Through the solubility of silver into the glass system as function of its initial concentration, charged species characterized as Ag+ and Agmn+ were formed and identified according to their absorption and emission spectral responses. By changing the transition metal concentration, multi-energy transfer mechanisms were observed between silver and Yb3+/Pr3+ co-doped glasses. The stabilization of silver species seems to be detrimental to the radiative processes of the rare earth ions under excitation at 444 nm ((Pr3+H4)-H-3 -> P-3(0) absorption line). In other words, the main visible emissions of Pr3+ and the NIR emission of Yb3+ decrease with increment of Ag concentration. However, energy transfer occurs for large spectral range by the excitation of the silver species. In consequence, the visible and NIR emission could be activate in a broadband from ultraviolet to the blue part of the spectral region. These two observations highlight the competitive absorption processes and probabilities between the cationic elements and the interest to use the transition metal species as sensitizers to excite the rare earth elements. (AU)

Processo FAPESP: 18/09296-3 - Vidros dopados com nanopartículas de prata sob medida pela técnica de gravação direta a laser (DLW): Aplicação em guia de onda 3D e geração de segundo harmônico (SHG)
Beneficiário:Hssen Fares
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
Beneficiário:Edgar Dutra Zanotto
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
Processo FAPESP: 16/16343-2 - Síntese e caracterização de vidros e vitrocerâmicas transparentes contendo íons terras raras
Beneficiário:Hssen Fares
Linha de fomento: Bolsas no Brasil - Pós-Doutorado