Preparation And Study Of Diethylamine Based Organic-Inorganic Hybrid Perovskite Materials

The organic-inorganic hybrid perovskite solar cell?PSC?has developed rapidly,and its rapid improvement in photoelectric conversion efficiency has made it a research hotspot in the field of solar cells for several years.Organic-inorganic hybrid perovskite materials are capable of modulating organic and inorganic components at the molecular level.In the regulation of organic cations,most of them are primary amino group substitutions,and secondary amines are rarely studied as organic-inorganic hybrid perovskite organic cation components.In this thesis,the diethylamino group-based organic-inorganic hybrid perovskite material was designed and synthesized by using diethylamine as the organic cation component and Sn²⁺,Cu²⁺and Zn²⁺as the metal cation components.The structure and photoelectric properties were analyzed.The diethylamine-based perovskite materials?C₂H₅?₂NH₂SnCl₃,?C₂H₅?₂NH₂CuCl₃,?C₂H₅?₂NH₂ZnCl₃,[?C₂H₅?₂NH₂]₂SnCl₄,[?C₂H₅?₂NH₂]₂CuCl₄ and[?C₂H₅?₂NH₂]₂ZnCl₄were synthesized by reprecipitation with Sn²⁺,Cu²⁺,Zn²⁺as metal cation components and Cl^-as the anion,explore the feasibility of secondary amines as organic cation components.The solubility of the reactant?C₂H₅?₂NH₂Cl and metal chloride in several common solvents in the laboratory was investigated experimentally,and the reaction solvent pair was found to determine that tetrahydrofuran was a benign solvent and the poor solvent was water.The structure and properties of the six target products were characterized.A good crystal structure was observed under the microscope.The UV-Vis spectra showed good light absorption properties,and the absorption peaks of the materials in the B and Q bands?C₂H₅?₂NH₂SnCl₃?301nm,453nm?,?C₂H₅?₂NH₂CuCl₃?290nm,459nm?,?C₂H₅?₂NH₂ZnCl₃?206nm,264nm?and[?C₂H₅?₂NH₂]₂SnCl₄?312nm,442nm?,[?C₂H₅?₂NH₂]₂CuCl₄?310nm,454nm?,[?C₂H₅?₂NH₂]₂ZnCl₄?208nm,259nm?indicates that the ABX₃ series perovskite exhibits a blue shift in the B band compared to the A₂BX₄ series perovskite,while the Q band exhibits different The degree of red shift broadens the range of light absorption,the photoluminescence properties are characterized by fluorescence spectroscopy,the redox properties of the cyclic voltammetry curve are characterized.