Ultraviolet Upconversion Luminescence in a Highly Transparent Triply-Doped Gd3+-Tm3+-Yb3+ Fluoride-Phosphate Glasses

Autor(es)

Galleani, Gustavo ^{[1, 2]} ; Santagneli, Silvia Helena ^{[1, 2]} ; Ledemi, Yannick ^{[3, 4]} ; Messaddeq, Younes ^{[3, 4, 1, 2]} ; Janka, Oliver ^[5] ; Poettgen, Rainer ^[5] ; Eckert, Hellmut ^{[6, 7]}

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, UNESP, Photon Quebec Brazil Joint Int Res Unit, BR-13566590 Araraquara, SP - Brazil

^[2] Sao Paulo State Univ, UNESP, Inst Chem, BR-13566590 Araraquara, SP - Brazil

^[3] Univ Laval, Photon Quebec Brazil Joint Int Res Unit, Quebec City, PQ G1V 0A6 - Canada

^[4] Univ Laval, Ctr Opt Photon & Lasers, Quebec City, PQ G1V 0A6 - Canada

^[5] WWU, Inst Anorgan & Analyt Chem, D-48149 Munster - Germany

^[6] WWU, Inst Phys Chem, D-48149 Munster - Germany

^[7] Univ Sao Paulo, Inst Fis Sao Carlos, BR-05508020 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Physical Chemistry C; v. 122, n. 4, p. 2275-2284, FEB 1 2018.
• Citações Web of Science: 8

Resumo

We report near-infrared to ultraviolet (UV) upconversion emissions in triply-doped Gd3+-Tm3+-Yb3+ fluoride-phosphate glasses. Emission at 310 nm, originated from the Gd3+:P-6(7/2) -> S-8(7/2) transition, was observed for the first time in glasses. The high-purity glasses prepared exhibit extended transparency in the UV down to 200-250 nm. The mixed fluoride-phosphate environment of the rare-earth ions was characterized by means of NMR techniques using scandium as a diamagnetic mimic for the luminescent species, for which the ligand distribution was quantified by Sc-45[P-31] rotational echo double resonance NMR. Both the intensity of the Gd3+ emission as well as those of the UV emissions at 290, 347, and 363 nm increase with increasing ratio of fluoride to phosphate ligands coordinating to the rare-earth ion. (AU)

• Processo FAPESP: 15/22828-6 - Ultrapassando as fronteiras de fibras ópticas: da fotônica até optogenética e monitoramento de meio ambiente
• Beneficiário: Younes Messaddeq
• Linha de fomento: Auxílio à Pesquisa - Programa SPEC
• 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