Low-temperature sintering of bismuth-doped glass with high fluorescence properties from mesoporous silica SBA-15
Low-temperature sintering of bismuth-doped glass with high fluorescence properties from mesoporous silica SBA-15
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介孔二氧化硅SBA-15低温烧结高荧光性能掺铋玻璃
DOI：
10.1016/j.ceramint.2019.09.085
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发表时间：
2020
影响因子：
5.2
通讯作者：
Wan Jiang
中科院分区：
文献类型：
--
作者：
Lei Yuan;Shijia Gu;Xin Zhang;Yuye Zhao;Wei Luo;Lianjun Wang;Wan Jiang
A kind of bismuth-doped silica glasses have been produced successfully by spark plasma sintering at 1070 °C using bismuth-doped SBA-15 powders. The samples were detected by X-ray diffraction, UV–vis–NIR, photoluminescence, fluorescent decay curve and X-ray photoelectron spectroscopy. The results showed that the samples possess favorable near-infrared fluorescence and the 0.9 mol% sample is the best one among these glasses. The emission peaks at ~1180, ~1150 and ~1250 nm can be observed when excited by 500, 700 and 800 nm. The average lifetimes of 0.9 mol% under 500, 700 and 800 nm excitation are 189.87, 311.46 and 132.16 μs. Furthermore, the value of the important optical parameter σemτ is 5.79 × 10−24cm2s at 800 nm excitations, which is 36.8% and 9.2% larger than bismuth-doped germanate glasses and phosphate glasses that have been reported. These emission peaks could be decomposed into three bands at ~1150, ~1240 and ~1440 nm via Gaussian decomposition. Based on the results of this work, it is concluded that the NIR emission peaks at ~1150, ~1240 and ~1440 nm correspond to Bi0, Bi+and (Bi2)2-, respectively. This glass with excellent luminescence properties could offer a practical material to improve the performance of broadband fiber amplifiers and tunable lasers.
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