Multicolor green to orange-red emission of Tb3+ and Eu3+-codoped tellurite glasses: Eu3+ concentration and Tb3+ → Eu3+ energy transfer

M. E. Alvarez-Ramos*, J. Alvarado-Rivera, F. Félix-Domínguez, R. C. Carrillo-Torres, R. Sánchez-Zeferino, G. Saavedra-Rodríguez

*Autor correspondiente de este trabajo

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

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Resumen

A series of the TeO2–GeO2–ZnO glass system was single and double doped with different Tb3+/Eu3+ ratios. Their luminescent and colorimetric properties were analyzed for possible use as phosphor materials in lighting devices. The characterization by X-ray diffraction and Raman spectroscopy verified the glassy nature of the fabricated samples. The luminescent properties of the doped glasses were analyzed by means of steady-state fluorescence and time-resolved spectroscopy. The Tb3+ excitation bands observed in the codoped samples while monitoring the 700 nm emission of Eu3+, as well as the shortening of Tb3+ lifetime in presence of europium indicated a Tb3+ → Eu3+ energy transfer, which main interaction type is electric dipole–dipole, according to Inokuti–Hirayama model. The Eu3+ → Tb3+ energy transfer also occurs in the samples but with lower efficiency. The CIE1931 chromaticity coordinates, upon different excitation wavelengths, show a multicolor tunning from green to orange-red due to the lanthanide concentration ratio and the Tb3+ → Eu3+ energy transfer process.

Idioma originalInglés
Número de artículo75
PublicaciónApplied Physics A: Materials Science and Processing
Volumen129
N.º1
DOI
EstadoPublicada - ene. 2023

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© 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.

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