A temperature detection method based on the upconversion luminescence intensity ratio of rare earth Er ion four-level system

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...

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