Effect of Al2O3/SiO2 Ratio on Luminescence Properties of Sm3+ Doped Alumino Silicate Glasses

In this work, Sm³⁺ doped strontium-magnesium aluminosilicate glasses were made by traditional melting method. The influence of the Al₂O₃/SiO₂ ratio on the luminescence properties of Sm³⁺ ions was investigated using XRD, Raman, spectrophotometry, and Judd–Ofelt theory, respectively. As the Al₂O₃ concentration increases, the number of Al-O bonds in the glass network also rises, significantly improving the absorption of Sm³⁺ ions, which in turn improves their luminescent performance. Under the excitation of 405 nm, the emission peak is mainly located near 602 nm. When the Al₂O₃/SiO₂ ratio is 0.6, the glass exhibits the highest luminescence intensity. The effective bandwidth of the A_0.6 glass sample at the ⁴G_5/2 → ⁶H_7/2 transition is 18.52 nm, with an emission cross-section of 7.13 × 10⁻²² cm². The experimental results show that the glass samples have excellent orange light emission properties, and these samples have potential application prospects in the field of color development.