科研之友
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摘要
A strategy to achieve high Sensitivity of noncontact optical thermometer via the structure design of nanoglass-cerarnic and the usage of Ln(3+) (Ln = Eu, Tb, Dy) luminescence as reference signal and Cr3+ emission as temperature signal was provided. Specifically, the synthesized dual-phase glass-ceramics were evidenced to enable spatially confined doping of Ln(3+) in the hexagonal GdF3 nanocrystals and Cr3+ in the cubic Ga2O3 nanoparticles, being beneficial to suppressing detrimental energy transfer between Ln(3+) and Cr3+ and thus significantly enhancing their luminescence. As a consequence, completely different temperature-sensitive luminescence of Ln(3+)4f -> 4f transition and Cr3+ 3d -> 3d transition in the present glass-ceramic resulted in obvious variation of Cr3+/Ln(3+) fluorescence intensity ratio with temperature and strikingly high detecting temperature sensitivity of 15-22% per K. We believe that this preliminary study will provide an important advance in exploring other innovative optical thermometry.
- 出版日期2016-4-5
- 单位杭州电子科技大学
