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A temperature detection method based on the upconversion 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 measurement accuracy of luminous intensity and low temperature sensitivity

Active Publication Date: 2021-04-09
DALIAN NATIONALITIES UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A temperature detection method based on the upconversion luminescence intensity ratio of rare earth Er ion four-level system
  • A temperature detection method based on the upconversion luminescence intensity ratio of rare earth Er ion four-level system
  • A temperature detection method based on the upconversion 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, in particular to a temperature detection method based on the up-conversion luminous intensity ratio of a rare earth Er ion four-level system. The present invention uses rare earth Er 3+ ion thermal coupling energy levels 2 h 11 / 2 and 4 S 3 / 2 Towards 4 I 13 / 2 Infrared upconversion luminescence of energy level transitions and transition to the ground state 4 I 15 / 2 The green up-conversion luminescence of energy level transition, through the quantitative relationship between the luminous intensity ratio and temperature, realizes a rare earth-based Er 3+ The fluorescence intensity of the ion four-level system is higher than that obtained by a new method of temperature measurement, which is characterized by 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 Patents(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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