Temperature detection method based on up-conversion luminescence intensity ratio of rare earth Er ion four-level system

A luminous intensity, four-level technology, applied in the field of temperature detection, can solve the problems of low luminous intensity measurement accuracy and low temperature sensitivity, to avoid low luminous intensity measurement accuracy, improve temperature detection sensitivity, infrared and green up-conversion luminescence Effects with accurate intensity values

Active Publication Date: 2020-02-28
DALIAN NATIONALITIES UNIVERSITY
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Problems solved by technology

[0021] The present invention overcomes the previous Er-based 3+ The fluorescence intensity ratio of the three-level system of ions has the shortcomings of low luminescence intensity measurement accuracy and low temperature sensitivity caused by the overlap of luminescence peaks in the temperature measurement technology. 3+ The green and infrared up-conversion luminescence of the ion four-level system not only effectively avoids the problem of low luminous intensity measurement accuracy caused by overlapping luminescence peaks, but also greatly improves the temperature detection sensitivity, realizing a high-precision and high-temperature sensor. Sensitivity based on rare earth Er 3+ A New Method of Ion Upconversion Luminescence for Temperature Detection

Method used

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  • Temperature detection method based on up-conversion luminescence intensity ratio of rare earth Er ion four-level system
  • Temperature detection method based on up-conversion luminescence intensity ratio of rare earth Er ion four-level system
  • Temperature detection method based on up-conversion luminescence intensity ratio of rare earth Er ion four-level system

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Embodiment 1

[0046] Using 980nm laser as excitation source to excite rare earth Er 3+ -Yb 3+ Co-doped ZnO phosphor, obtained from Er in the temperature range of 300-625K 3+ The fluorescence intensity ratio of the green and infrared upconversion luminescence use the formula Fit the fluorescence intensity ratio curves at different temperatures to obtain Er 3+ -Yb 3+ Co-doped ZnO phosphors based on rare earth Er 3+ Quantitative dependence of fluorescence intensity ratio on temperature for an ionic four-level system.

Embodiment 2

[0048] Using 980nm laser as excitation source to excite rare earth Er 3+ Doping Yb 2 Ti 2 o 7 Phosphor powder, obtained from Er in the temperature range of 325-650K 3+ The fluorescence intensity ratio of the green and infrared upconversion luminescence use the formula Fit the fluorescence intensity ratio curves at different temperatures to obtain Er 3+ Doping Yb 2 Ti 2 o 7 Phosphor based on rare earth Er 3+ Quantitative dependence of fluorescence intensity ratio on temperature for an ionic four-level system.

[0049] From figure 2 Er 3+ It can be seen from the ion upconversion luminescence energy level diagram that the rare earth Er 3+ Under the excitation of 980nm infrared laser, the ions are thermally coupled to the energy level 2 h 11 / 2 and 4 S 3 / 2 ground state 4 I 15 / 2 Energy level radiative transition, emitting green up-conversion luminescence with central wavelengths of 521 and 541nm. Thermally Coupled Energy Levels 2 h 11 / 2 and 4 S 3 / 2 separate...

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Abstract

The invention relates to a temperature detection method, particularly to a temperature detection method based on an up-conversion luminescence intensity ratio of a rare earth Er ion four-level system.The method is characterized in that infrared up-conversion luminescence of transition from rare earth Er<3+> ion thermal coupling levels <2>H11/2 and <4>S3/2 to a <4>I13/2 level and green up-conversion luminescence of transition from the rare earth Er<3+> ion thermal coupling levels <2>H11/2 and <4>S3/2 to a ground <4>I15/2 level are adopted, and a fluorescence intensity, which is obtained through the novel temperature detection method based on the fluorescence intensity ratio of the rare earth Er<3+> ion four-level system, is achieved through a quantitative relation between the ratio of an infrared up-conversion luminescence intensity to green up-conversion luminescence intensities and the temperature. The method has the characteristics of high precision and high temperature sensing sensitivity.

Description

technical field [0001] The invention relates to a temperature detection method, in particular using the fluorescence intensity ratio technology, through the rare earth Er 3+ Green and infrared upconversion luminescence of ionic four-level systems, enabling a rare-earth Er-based sensor with high precision and high temperature sensing sensitivity 3+ A new method for temperature detection by ion upconversion luminescence. Background technique [0002] Temperature is a very important parameter in many fields such as physics, chemistry, biomedicine, and engineering technology. It is of great scientific significance and application value to realize a temperature measurement method with strong anti-interference ability, high sensitivity and spatial resolution, and rapid response. Temperature measurement can be divided into contact type and non-contact type. Compared with contact type temperature measurement, non-contact type does not need to consider the physical characteristics o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/20
CPCG01K11/20
Inventor 曹保胜高校门飞何洋洋张振翼冯志庆董斌
Owner DALIAN NATIONALITIES UNIVERSITY
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