Autor(es)

Dantas, N. F. ; Melo, G. H. A. ; Lodi, T. A. ; Pedrochi, F. ; Steimacher, A.

• Tipo de documento: Artigo Científico
• Fonte: Journal of Luminescence; v. 270, p. 10-pg., 2024-03-14.

Resumo

In this work, a series of zinc borophosphate glasses (ZnPBAl), doped and codoped with Dy 3 + and Sm 3 + , was studied for potential application in W -LEDs. The samples were prepared by the melt -quenching method and their luminescent and optical properties were investigated. The optical absorption spectra presented all Dy 3 + and Sm 3 + peaks corresponding to the transitions from the 6 H 15/2 and 6 H 5/2 states, respectively, to the excited energy levels. The 350 nm excitation source was chosen, considering photoluminescence excitation (PLE) results, to investigate the energy transfer from Dy 3 + to Sm 3 + ions. The energy transfer was indicated by photoluminescence (PL) spectra of Dy:Sm-codoped glasses and investigated by the energy transfer efficiency (eta) using the lifetime data of both doped and codoped samples. The PL as a function of temperature was also studied. The CIE diagram of Dy-doped glasses showed their color emission close to the white region and the simulation of a combined Blue LED created an illumination route from warm to cold white light. (AU)

• Processo FAPESP: 23/01625-6 - Desenvolvimento de novas metodologias para fabricação de fibras ópticas a partir de vidros exóticos
• Beneficiário: Marcelo Nalin
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 23/09906-4 - Desenvolvimento de novas metodologias para fabricação de fibras ópticas a partir de vidros exóticos
• Beneficiário: Thiago Augusto Lodi
• Modalidade de apoio: Bolsas no Brasil - Programa Fixação de Jovens Doutores