Effect of Er3+ concentration on the luminescence properties of Al2O3-ZrO2 powder

Optical Materials Volume: 62 Pages: 553-560 Published: 2016

2 de dezembro de 2016 CDMF Artigo 0

SEM-images-of-Er3 — SEM images of Er3þ on Al2O3-ZrO2 powder annealed at 1500 °C for different Erbium concentrations: a) E3A15, b) E5A15, c) E7A15 and d) E10A15.

Writers: J.L. Clabel H. and V.A.G. Rivera and I.C. Nogueira and E.R. Leite and M. Siu Li and E. Marega Jr.

Keywords: Luminescence; Erbium; Crystallization phases; Lifetime

Abstract: This manuscript reports on the effects of the luminescence properties of Er³⁺ on Al₂O₃-ZrO₂ powder synthesized by the conventional solid-state method. The best conditions found for the calcinations were 1500 °C and 4 h. The structural dependence of the luminescence on Er³⁺:Al₂O₃-ZrO₂ is associated with phase transformations of the Al₂O₃-ZrO₂ host and presence of the OH group. Green and red emissions at room temperature from the ²H_11/2, ⁴S_3/2 → ⁴I_15/2 and ⁴F_9/2 → ⁴I_15/2 levels of Er³⁺ ions were observed under 482 nm pumping. The green-to-red emission intensity ratios and CIE chromaticity coordinates were determined from emission spectra for the evaluation of light emitted as a function of the Er³⁺ concentration. The Er³⁺ luminescence quenching due to group OH and variation in the Er³⁺ concentration plays an important role in the definition of the luminescent response.

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