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
CN110849500AActive Publication Date: 2020-02-28DALIAN NATIONALITIES UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN NATIONALITIES UNIVERSITY
Publication Date
2020-02-28

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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.
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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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