Effect of Al on photoluminescence properties of Nd3+ in silicate glass prepared by in-situ sol-gel method.

Autor: Dawngliana, K. M. S., Puia, Lalruat, Fanai, A. L., Lalrempuia, Ralte, Rai, S.
Zdroj: Journal of Sol-Gel Science & Technology; Nov2024, Vol. 112 Issue 2, p444-455, 12p
Abstrakt: This article discusses our investigations into the structural and spectroscopic properties of Nd3+ co-doped alumino-silicate glass prepared by an in-situ sol-gel method. Structural characterization was carried out using X-ray powder diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) techniques. The XRD analysis reveals that the material is still amorphous even after being heated to 900 °C. FTIR analysis was used to identify the functional groups of the produced sol-gel silicate glass. The optical absorption spectra from the ground state 4I9/2 show seven peaks in the UV-VIS and NIR regions. The optical absorption spectrum of Nd3+ co-doped alumino-silicate glass-ceramic was used to determine the Judd-Ofelt (JO) intensity parameters (Ω2, Ω4 and Ω6). The photoluminescence (PL) spectrum was recorded with a 2W diode laser source of 808 nm excitations. From the larger stimulated emission cross-section (3.80 x 10−20 cm2) of the 4F3/2 → 4I11/2 transition, it is concluded that the SiNdAl glasses could be highly useful for the development of solid state laser materials. From the observed refractive indices at three different wavelengths, non-linear parameters for the glass, such as the Abbe number (υAb) and non-linear refractive index (n2), are derived. Highlights: Nd3+ ions co-doped with alumino-silicate glass is prepared by in-situ sol-gel methods. Red-shift in absorption peaks observed after annealing due to nephelauxetic effect. The Judd–Ofelt parameter Ω2 increased and Ω6 decreased with annealing. PL intensity increases with annealing. PL intensity increases with increasing Al content. Various physical parameters like density, refractive index and non-linear polarizability are measured to investigate possible device applications of the samples. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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