A kind of up-conversion luminescent nanocrystal and its preparation method and application

A nanocrystalline and fluorescent technology, applied in luminescent materials, nanotechnology, nano optics, etc., can solve problems such as temperature measurement errors, temperature calibration curves of probe materials, and changes in temperature measurement performance, so as to improve energy level correlation and shorten The effect of ion spacing
CN110669520BActive Publication Date: 2022-02-22CHINA JILIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA JILIANG UNIV
Publication Date
2022-02-22

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Abstract

The invention discloses an up-conversion luminescent nanocrystalline material, a preparation method and application thereof. The material is Zr with high-temperature fluorescence enhancement characteristics. (1‑x‑y‑z) Ho x Yb y Nb z O 2 Tetragonal nanocrystals, wherein x=0.25~1.2%, y=2.5~12%, z=2~10%, x:y=1:(10~40), and the nanocrystals have an average particle size of 7~10nm spherical particles. When the temperature was raised from room temperature to 413K, the green light (545nm) and red light (675nm) emitted by the nanocrystals under the excitation of 980nm laser exhibited abnormal luminescence enhancement. The up-conversion luminescent nanocrystal of the present invention can be used to prepare a fluorescent high-temperature enhanced temperature probe, and the fluorescent high-temperature enhanced temperature probe can be used for temperature sensing. The temperature detection that is not disturbed by the fluctuation of excitation power can be realized, and the problems of the existing fluorescent temperature sensing materials that the temperature calibration curve is changed and the error is increased due to the light source are solved.
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Description

technical field

[0001] The invention relates to an up-conversion luminescent nanocrystal and its preparation method and application, belonging to the technical field of material science. Background technique

[0002] In recent years, compared with conventional contact thermometers, fluorescent temperature sensors have attracted extensive attention due to their non-contact, high-precision temperature detection. Among them, the fluorescence intensity ratio temperature measurement technology based on rare earth doped nanocrystals measures temperature through the relationship between the intensity ratio and temperature of two fluorescence peaks with different temperature response characteristics, and has the advantages of anti-electromagnetic interference, remote monitoring, space With the advantages of high temperature resolution and fast response speed, it can meet the needs of micro-nano scale real-time temperature detection in the fields of life medicine, nanotechnology, ene...

Claims

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