Preparation And Luminescence Properties Of Titanium Dioxide Based Organically Modified Silicate Composite Optical Waveguide Films Doped With Rare Earth Ions

Rare earth luminescent materials have gained wide attention in the fields of color display,laser and anti-counterfeiting,the organic-inorganic composite material combines the characteristics of both organic materials and inorganic materials have become a focus for scholars of domestic and foreign.In this thesis,TiO₂/organo-modified silicate organic-inorganic composite optical waveguide film materials with Er₂O₃ nanocrystals and YAG:Ce nanopowders were prepared by sol-gel method and spin coating method,composite thin films have been studied and analyzed in detail,Specifically,it includes the following parts:Firstly,Er₂O₃ nanocrystalline organic-inorganic composite film was prepared.The properties of composite films at different heat treatment temperatures and different Er₂O₃ nanocrystal concentrations were investigated:Optical transmittance,it shows that the composite film material has high optical transmittance in visible light;Optical waveguide characteristics and surface topography,it shows that a single layer of a few micron thick,smooth and dense composite film can be obtained at low temperature;Upconversion luminescence,the composite film exhibits significant luminescence at 540 nm,563 nm,and 662 nm and the chemical structure;In addition,including Chemical structure and material composition.Second,YAG:Ce nanopowder organic-inorganic composite film was prepared and the properties of the composite film under different heat treatment temperatures and different YAG:Ce nanopowder concentrations were studied:Optical transmittance,it shows that the composite film has an optical transmittance of 80%or more in the visible light band;Refractive index,thickness and surface topography,,it shows that a single layer of a few micron thick,smooth and dense composite film can be obtained at low temperature;Down conversion luminescence,the composite film showed strong luminescence at a central wavelength of 580 nm;In addition,including chemical structure and material composition.