Study On Preparation,properties And Application Of Rare Earth Ion Doped NaNbO₃ Upconversion Luminescent Materials

In recent years,the sustained high-speed development of society is inseparable from the use of clean energy.Therefore,finding alternative clean energy has become the primary task of human sustainable development.As an important source of clean energy,solar energy has the advantages of wide distribution,free renewable and long-term existence.One of the common ways to use solar energy is solar cells,the principle of which is to convert sunlight's light energy into electrical energy.The all-inorganic perovskite solar cell has the advantages of low manufacturing cost,simple manufacturing process,and good stability even under humid air,which shows a good research prospect.However,the response range of all-inorganic perovskite solar cells to sunlight is only visible light,and visible light accounts for 50%of solar radiation,of which 43%of infrared light can only be wasted in the form of thermal energy.In order to effectively utilize sunlight,up-converting luminescent materials can be used to widen the spectral response range of all-inorganic perovskite solar cells.This paper studies the preparation and optical properties of sodium niobate up-conversion luminescent materials,as well as its application in all-inorganic perovskite solar cells.In this thesis,the preparation,structure,morphology and properties of NaNbO ₃/results;The results of fluorescence spectrum analysis,the relationship between excitation light and fluorescence power are used to obtain the fluorescence influencing factors and up-conversion luminescence mechanism of materials were prepared by controlling the reaction conditions.The results showed that the ratio of water to ethylene glycol=1:8,when the reaction time is 720 min,Si O₂ of about 15 nm;Through fluorescence spectrum and fluorescence power intensity.In this thesis,the spin-coating method was used to prepare all-inorganic CsPbBr₃ perovskite solar cells with a photoelectric conversion efficiency of 6.9%.slurry,and then the slurry is directly mixed into the battery by directly mixing the slurry with the mesoporous layer TiO₂.The all-inorganic CsPbBr₃perovskite solar cell achieves a photoelectric conversion efficiency of 9.56%.