This paper reports on the sensitization of the red Mn²⁺ emission in phosphate glasses via luminescent defects induced by silicon. Glasses of barium-phosphate matrix were prepared by melting and analyzed by X-ray diffraction, Fourier transform-infrared spectroscopy, optical absorption, and photoluminescence spectroscopy with focus on decay dynamics and time-resolved assessment. A comparative investigation was performed with singly-MnO₂ doped glasses within 4 – 8 mol% and counterparts which were also co-doped with Si powder in the same amount. Silicon co-doping resulted in: (i) improved UV transparencies; (ii) significant reduction of MnO₂ facilitating Mn²⁺ stabilization; and (iii) the formation of luminescent defects with emission overlapping Mn²⁺ excitation (e.g. ⁶A₁(S) → ⁴E(G),⁴A₁(G) transitions around 410 nm). Consequently, the Si-induced defects gave rise to a new Mn²⁺ excitation band around 270 nm leading to the red ⁴T₁(G) → ⁶A₁(S) band emission from Mn²⁺ ions. The decay kinetics of the defects as well as the Mn²⁺ ions were analyzed via time-resolved measurements aiming to elucidate the physical interactions. A UV-to-visible down-conversion pathway originating at Si-related defects is ultimately proposed.

本文报道了通过硅引起的发光缺陷使磷酸盐玻璃中的红色Mn ²⁺发射增敏。熔融制备磷酸钡基质玻璃，并通过X射线衍射，傅立叶变换红外光谱，光吸收和光致发光光谱进行分析，重点是衰减动力学和时间分辨评估。对比研究使用了4 – 8 mol％的单MnO ₂掺杂玻璃和同样掺有相同量Si粉末的对应玻璃。硅共掺杂导致：（i）改善了紫外线透明度；（ii）显着减少MnO _2，以促进Mn ^2+的稳定化；和（iii）发光缺陷的形成，其发光与Mn ²⁺激发重叠（例如⁶ A ₁（S）→ ⁴ E（G），⁴ A ₁（G）跃迁在410 nm附近）。因此，将Si引起的缺陷产生了一个新的Mn ²⁺激发带围绕270nm处通往红色⁴ Ť ₁（G）→ ⁶阿₁（S）带选自Mn发射²⁺离子。缺陷以及Mn ²⁺的衰减动力学通过时间分辨测量分析离子，以阐明物理相互作用。最终提出了起源于硅相关缺陷的紫外到可见光下转换途径。