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Sextuple ratiometric thermometry based on 980-nm-upconverted green fluorescence of Er~(3+) ions in submicron crystals

机译:基于亚微米晶体中Er〜(3+)离子的980nm上转换绿色荧光的六倍体比重测温法

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摘要

980-nm-upconverted 530 and 550 nm Er3+ green fluorescence spectra of Er3+/Yb3+-codoped NaGd(WO4)(2) submicron crystals were measured in the temperature range of 298-383 K. A sextuple ratiometric thermometry is proposed. It is established on the basis of six schemes of fluorescence intensity ratio (FIR) that considers three component peaks of the 530 nm emission band and two component peaks of the 550 nm emission band, which involve electronic transitions between two Stark sublevels of Er3+. The study shows that the phosphor shows strong green fluorescence, which is verified by measured quantum yield, and thermally stable spectral structure desired for the sextuple ratiometric thermometry. All of the six FIR schemes display highly efficient sensing performances with slightly different thermal sensitivities. Each scheme gives a temperature value and the six schemes give an averaged result. In parallel, we have also carried out an ex vivo experimental study on the temperature characteristics of the green fluorescence of the phosphor. Almost same results have been obtained, verifying biological applicability of the phosphor. The ex vivo experimental results also show that the sextuple thermometry increases considerably the accuracy and reliability of temperature measurement in comparison with the conventional intensity integration method.
机译:在298-383 K的温度范围内,测量了Er3 + / Yb3 +掺杂的NaGd(WO4)(2)亚微米晶体的980nm上转换的530 nm和550nm的Er3 +绿色荧光光谱。提出了六元比率的测温法。它是基于六种荧光强度比(FIR)方案建立的,该方案考虑了530 nm发射带的三个组分峰和550 nm发射带的两个组分峰,这涉及Er3 +的两个Stark子级之间的电子跃迁。研究表明,磷光体显示出强烈的绿色荧光,这已通过测得的量子产率得到证实,并且具有六元比率测温法所需的热稳定光谱结构。六个FIR方案中的所有方案均显示出高效的感测性能,而热敏度略有不同。每个方案给出一个温度值,六个方案给出一个平均值。同时,我们还对荧光粉的绿色荧光的温度特性进行了离体实验研究。已经获得几乎相同的结果,证实了磷光体的生物学适用性。离体实验结果还表明,与常规强度积分法相比,六元体测温法显着提高了温度测量的准确性和可靠性。

著录项

  • 来源
    《Materials science & engineering》 |2020年第3期|110512.1-110512.9|共9页
  • 作者

  • 作者单位

    Tianjin Univ Minist Educ Sch Precis Instruments & Oproelect Engn Dept Optoelect & Informat Engn Tianjin 300072 Peoples R China|Tianjin Univ Minist Educ Key Lab Oproelect Informat Technol Tianjin 300072 Peoples R China;

    Tianjin Sino German Univ Appl Sci 2 Yanshan Rd Haihe Educ Pk Tianjin 300350 Peoples R China;

    Univ Paris VI Pierre & Marie Curie Univ Dept Engn 4 Pl Jussieu F-75005 Paris France;

    City Univ Hong Kong Dept Elect Engn Hong Kong Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sensors; Sextuple ratiometric thermometry; Green fluorescence; Er3+/Yb3+-codoped submicron crystals; Ex vivo measurement;

    机译:传感器;六元比率测温法;绿色荧光;Er3 + / Yb3 +掺杂的亚微米晶体;离体测量;

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