Study On Luminescence Properties Of Rare Earth And Transition Ions Doped KZnF₃ Single Crystals

Solid laser matrix materials can be divided into crystals,glass,brazing and ceramics.Compared with other materials,the advantages of crystals lie in high thermal conductivity,narrow fluorescence lines and high hardness.Therefore,crystals have been widely used in solid-state lasers.However,the pursuit of high quality,large size,high laser performance,low cost and adjustable laser crystal materials has always been the focus of researchers.Rare earth ions Eu²⁺and transition metal ions Mn²⁺and Co²⁺were co-doped in the crystal materials.The purpose of this study was to study the fluorescence spectra of Eu²⁺,Mn²⁺,Co²⁺ions in KZnF₃crystal samples and the interaction between luminescent ions and central ions in KZnF₃crystal samples.The process of energy transfer between ions is briefly described.The luminescence characteristics of crystal samples grown by crucible drop method are studied by X-ray diffraction,absorption,fluorescence and fluorescence lifetime decay curves.Chapter 1 introduces the application and development of solid-state lasers,the introduction of rare earth and transition metal ions used in this paper,the advantages of laser crystals as luminescent materials,and the laser crystals（potassium zinc fluoride crystals）studied in this paper.Chapter 2 introduces the whole process of preparation of potassium zinc fluoride single crystal,characterization of crystal properties of grown complete samples and related basic theories.Chapter 3 introduces a series of spectral characterization of Eu²⁺doped KZnF₃single crystals,and studies the influence of Eu²⁺Doping on the luminescence of matrix materials.Chapter 4studies the spectral properties of Mn²⁺doped KZnF₃single crystal.The experimental results show that the introduction of transition metal ions Mn²⁺promotes the luminescence properties of matrix materials.The interaction between ions and the energy transfer process are analyzed.At the same time,the related parameters of the lattice field are calculated.Chapter 5 analyses and studies the characterization of luminescent properties of Co²⁺single doped KZnF₃crystals.By calculating the cell structure and lattice field parameters and energy transfer,the effect of transition metal ions on matrix luminescence is explained.The sixth chapter of this paper is the analysis and summarization of the experimental process and work results of this paper,and expounds a simple outlook for further research.