The Characteristics And Applications Of Upconversion Fluorescence Of Rare Earth Doped Yttrium Oxide Nanocrystals

China rare-earth industry plays an important role in the world because of its abundant in rare-earth deposits.Recently,with the development of technique,it has been made great progress on the research and application of rare-earth functional material,especially rare-earth upconversion material.The upconversion is a special property of rare earth ion.Higher conversion luminous efficiency is a hot spot.This article mainly studied the upconversion luminescence properties of Er doped Y2O3nanocrystals under the excitation of the 976 nm laser,and analyzed the influence factors,such as sintering temperature,doping concentration and the laser pump power.On this basis,this article studied the relationship between temperature sensing characteristics and concentration of samples,and analyzed the change rule of fluorescence intensity ratio with the temperature.Finally,this article studied the application of the temperature sensor.The main contents are as follows.1.Prepared different molar concentration samples of Er doped Y₂O₃ nanocrystals and sintered at different temperature.2.Measured the upconversion luminescence intensity curve of samples at different power and different molar concentration,and discussed the luminous mechanism of Y₂O₃nanocrystals.3.Analyzed the relationship between the luminous intensity and molar concentration,and further discussed the luminous mechanism of Y₂O₃ nanocrystals by using the change rule of integral intensity ratio of red and green with molar concentration.4.Studied the temperature sensing properties influenced by doping concentration of Er doped Y₂O₃ nanocrystals,and got the change rule of fluorescence intensity ratio with temperature,finally compared the temperature sensitivity.