Cold white light emission in tellurite-zinc glasses doped with Er3+–Yb3+–Tm3+ under 980 nm

G. Lozano, O. B. Silva, W. Faria, A. S.S. de Camargo, R. R. Gonçalves, D. Manzani, R. Bruna, V. A.G. Rivera, E. Marega

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2 Citas (Scopus)

Resumen

Tellurite-zinc glasses doped with Er3+, Yb3+ and Tm3+ were fabricated by conventional melt-quenching technique and characterised by absorption spectroscopy, refractive index, lifetime measurements, excitation, luminescence and up-conversion spectroscopy. Tunable blue to cold white light emission based on the colour mixing of red, green and blue light was obtained via up-conversion under 980 nm and by adjusting the laser excitation intensity. The balancing of the relative intensity of each colour is provided by the energy transfer process between the rare-earth ions. Moreover, luminescence spectroscopy was performed with a 405 nm laser to further understand the energy transfer mechanism that produce the white light. The Judd-Ofelt intensity parameters (Ω2, Ω4 and Ω6) were calculated for all samples and present the trend Ω246. The spectroscopic parameters were computed with the Judd-Ofelt theory as well as the energy transfer micro-parameters (critical radius of interaction and energy transfer coefficient). Such results shall be used to give a comprehensive explanation for the energy transfer process between these rare earth ions.

Idioma originalInglés
Número de artículo117538
PublicaciónJournal of Luminescence
Volumen228
DOI
EstadoPublicada - dic 2020

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Publisher Copyright:
© 2020 Elsevier B.V.

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