A new type of Ni²⁺-doped dual-phase glass ceramics (GCs) is developed by a simple one-step thermal-induced crystallization process. The GCs thus obtained are embedded simultaneously with hybrid ZnGa₂O₄ and ZnF₂ nanocrystals (NCs). When pumped by a readily available 808 nm laser diode, an ultra-broad near-infrared (NIR) emission in a range of 1100−2100 nm is observed at room temperature. The NIR emission band with a full-width-at-half-maximum (FWHM) of more than 450 nm is comparable to the largest value ever reported in Ni²⁺-doped GCs, and much broader than those of single-phase GCs embedded with either pure ZnGa₂O₄ or ZnF₂ NCs. The microscopic morphologies of the embedded hybrid NCs, and especially the distribution of Ni²⁺ in the dual-phase GCs are studied by analytical transmission electron microscopy (TEM). The intriguing photoluminescence properties of Ni²⁺ are thoroughly investigated by steady-state and time-resolved emission spectra. The GCs demonstrated herein hold promise as broadband solid-state NIR-light sources.

通过简单的一步热诱导结晶过程，开发了一种新型的Ni ²⁺掺杂双相玻璃陶瓷（GCs）。如此获得的GC与ZnGa ₂ O ₄和ZnF ₂混合纳米晶体（NCs）同时嵌入。当由容易获得的808 nm激光二极管泵浦时，在室温下可观察到1100-2100 nm范围内的超宽近红外（NIR）发射。最大半峰全宽（FWHM）超过450 nm的NIR发射带可与掺杂Ni ^2+的GC中报道的最大值相媲美，并且比嵌入的单相GC宽得多使用纯ZnGa ₂ O ₄或ZnF ₂NCs。通过分析透射电子显微镜（TEM）研究了嵌入式混合NC的微观形貌，特别是Ni ²⁺在双相GC中的分布。通过稳态和时间分辨发射光谱彻底研究了Ni ²⁺的有趣的光致发光特性。本文演示的GC有望作为宽带固态NIR光源。