Gao Zhigang, Lu Kailei, Lu Xiaosong, Li Xiaobo, Han Zhenyuan, Guo Shu, Liu Lu, He Fei, Yang Piaoping, Ren Jing, Zhang Jianzhong, Yang Jun
Opt Lett. 2019 Jun 15;44(12):2959-2961. doi: 10.1364/OL.44.002959.
With a specially designed composition, highly transparent Yb/Er-doped fluorosilicate glass ceramic (GC) containing KMnF perovskite nanocrystals (NCs) is obtained for the first time. The rare-earth ions are preferentially accumulated in regions embedded with KMnF NCs; as a result, a remarkably enhanced (by an order of magnitude) single-band red upconversion luminescence (UCL) is achieved. Absolute quantum efficiency of the red UCL, which cannot be measured in previous GCs owing to insufficiency, reaches as high as 0.10%±0.02% in the GC sample reported in this Letter. This value is even higher than that of the well-known multiband emitting β-NaYF:Er/Yb NCs and widely recognized GCs containing NaYF:Yb/ErNCs.
首次获得了具有特殊设计组成、含有KMnF钙钛矿纳米晶体（NCs）的高透明Yb/Er掺杂氟硅酸盐玻璃陶瓷（GC）。稀土离子优先聚集在嵌入KMnF NCs的区域；结果，实现了显著增强（一个数量级）的单波段红色上转换发光（UCL）。由于先前的GC中存在不足而无法测量的红色UCL的绝对量子效率，在本信函报道的GC样品中高达0.10%±0.02%。该值甚至高于著名的多波段发射β-NaYF:Er/Yb NCs以及广泛认可的含有NaYF:Yb/Er NCs的GC的值。
