Yb/Tm Codoped NaybF₄and NaluF₄Micro-nano Materials Controllable Synthesis And Study Of UV Upconversion Emission

Along with the micro-nano technology matures, rare earth doped luminescencematerials exist great application value in solid lasers, three dimensions display,biological label, biological imaging and so on many domains. Rare earth dopedluminescence materials is a big family, among them fluoride has receive muchattention because of low phonon energy and high fluorescent efficiency. As is wellknown that synthesis conditions of rare earth doped luminescence materials havedirectly effect on morphologies, sizes, and upconversion optical properties. So in thepast time, the researchers have been exploration perseverant and try to find the bestreaction conditions. To make the fluorescence intensity to achieve maximumefficiency. Among them, there are the most direct and effective method by changingthe reaction time, reaction temperature, and reactant ratio.First of all, this paper expounds the historical development, classification,synthesis methods and the upconversion mechanism of the rare earth dopedluminescence materials. And this paper summarizes the research progress of rare earthdoped fluoride in recent years recapitulative, analysises the problem of lowerdispersity uneven size and the low efficiency of upconversion fluorescence. It is goodfor our future research work to make the practical plan and look into the distance.Base on this, we synthesis the upconversion materials of different morphology anddifferent size by the synthesis method of efficient and concise. In the meantime, itsefficiency of upconversion luminescence has obvious difference because of thedifferent of size. We analysis the synthesis method of rare earth doped fluoride andthe upconversion optical properties by means of X-ray diffraction （XRD）, scanningelectron microscopy （SEM）, transmission electron microscopy （TEM）, and light oforganic spectrum （PL）. The main contents are as follows:（1） We use the hydrothermal method synthesis pure hexagonal phase （β-）NaYbF₄:Tm³⁺six prism shapes by using EDTA as surfactant. We detailed the bestgrowth conditions and growth mechanism of the different shape and size by changingthe reaction time, reactant ratio and type of surfactant.（2） We use hydrothermal method synthesis the NaLuF₄:Yb³⁺,Tm³⁺. The productis pure hexagonal phase by analysis the data of X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The size of this kind of material is about17m. Wedetermined the best reaction conditions through the analysis of the data. At the sametime, we also analyzed the optical properties of products of different morphologiesand different sizes.