Two-color thermosensors based on [Y \(_{1-x}\) Dy 详细信息    查看全文

• 作者：Benjamin R. Anderson ; Ray Gunawidjaja ; Hergen Eilers
• 刊名：Applied Physics B
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：123
• 期：2
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics, general; Physical Chemistry; Optics, Lasers, Photonics, Optical Devices; Quantum Optics; Engineering, general;
• 出版者：Springer Berlin Heidelberg
• ISSN：1432-0649
• 卷排序：123

文摘

We develop a two-color thermometry (TCT) phosphor based on [Y\(_{1-x}\)Dy\(_x\)(acetylacetonate)\(_3\)(1,10-phenanthroline)] ([Y\(_{1-x}\)Dy\(_x\)(acac)\(_3\)(phen)]) molecular crystals for use in heterogeneous materials. We characterize the optical properties of [Y\(_{1-x}\)Dy\(_x\)(acac)\(_3\)(phen)] crystals at different temperatures and Dy concentrations, and find that the emission is strongly quenched by increasing temperature and concentration. We also observe a broad background emission (due to the ligands) and find that [Y\(_{1-x}\)Dy\(_x\)(acac)\(_3\)(phen)] photodegrades under 355 nm illumination with the photodegradation resulting in decreased luminescence intensity. However, while decreasing the overall emission intensity, photodegradation is not found to influence the integrated intensity ratio of the \({}^4I_{15/2} \rightarrow {}^6H_{15/2}\) and \({}^4F_{9/2} \rightarrow {}^6H_{15/2}\) transitions. This ratio allows us to compute the temperature of the complex. Based on the temperature dependence of these ratios; we calculate that [Y\(_{1-x}\)Dy\(_x\)(acac)\(_3\)(phen)] has a maximum sensitivity of 1.5% K\(^{-1}\) and our TCT system has a minimum temperature resolution of 1.8 K. Finally, we demonstrate the use of [Y\(_{1-x}\)Dy\(_x\)(acac)\(_3\)(phen)] as a TCT phosphor by determining a dynamic temperature profile using the emission from [Y\(_{1-x}\)Dy\(_x\)(acac)\(_3\)(phen)].