Gd_2O_3: RE ~ (3) up-conversion luminescent materials preparation and characterization

Title: Gd_2O_3: RE ~ (3) up-conversion luminescent materials preparation and characterization
　　Author: Weixin
　　Degree-granting units: Northeast Normal University
　　Keywords: upconversion;; preparation;; characterization;; solid-phase method;; Gd_2O_3
　　Summary:
　　Up-conversion luminescence material is in the long wavelength of the excitation, inspire a class of short-wavelength light fluorescent material. Currently the center of rare earth ions as luminescence upconversion materials excited by infrared light at 980nm, the Neodymium Magnets visible light of different colors can be issued. Upconversion materials have begun to be applied to all areas of life.
　　This first principle of upconversion materials and research status are reviewed, for the upconversion of the matrix material whispered the child, low toxicity, easy preparation, etc., this choice Gd_2O_3 as a substrate material, rare earth Er ~ (3) , Yb ~ (3), Tm ~ (3) as the dopant ions, the use of high-temperature solid phase prepared Gd_2O_3: Yb ~ (3), Er ~ (3) and Gd_2O_3: Yb ~ (3), Tm ~ (3) Two systems upconversion materials. Detailed study of the doping ion type, concentration, sintering conditions, flux of light-emitting materials such as crystalline http://www.everbeenmagnet.com/en/products/110-sintered-neodymium-magnets and luminescent properties. Studies have shown that doping Yb ~ (3)-Er ~ (3) system can transmit red light, doped Yb ~ (3)-Tm ~ (3) system of red and blue light emission. Luminous intensity and spectral distribution of Yb ~ (3) / Er ~ (3), Yb ~ (3) / Tm ~ (3) the ratio is directly related. Flux of sodium chloride and lithium chloride are added can significantly improve the brightness. Research inspired by the relationship between power and light intensity determine the red and blue are the two-photon emission process, and discussed in detail upconversion mechanism.
　　Degree Year: 2010