8 results about "Caesium iodide" patented technology

The application belongs to the technical field of photovoltaic devices, and relates to preparation and application of a multifunctional organic additive doped CsSnI3 perovskite film; during preparation, a perovskite spin coating liquid is spin coated on an ITO glass substrate to form a precursor film, and the precursor film is subjected to annealing treatment to obtain a CsSnI3 perovskite film; the perovskite spin coating liquid is formed by adding stannous fluoride and 3-amino-pyrazine-2-carboxamide (3-APCA) to a perovskite precursor solution and stirring; the perovskite precursor solution is formed by dissolving cesium iodide and stannous iodide in an organic solvent; and the application is applied to solar cells, light-emitting diodes, photoelectric detectors, photoelectric catalysis and energy storage. The method introduces the multifunctional organic additive 3-APCA, realizes Sn 2+ oxidation inhibition, optimizes film crystallinity and passivates defects, and significantly improves the quality of the CsSnI3 perovskite film; and the application range is wide.

The application discloses a preparation method of a wide-bandgap perovskite photoactive layer, and comprises the following steps: S1, lead iodide powder, cesium iodide powder and ytterbium bromide powder are proportioned according to a proportioning molar ratio, and an inorganic target material is prepared by using a hot-press sintering process; S2, formamidinium hydriodide powder and methylammonium bromide powder are proportioned according to a proportioning molar ratio, and an organic target material is prepared by using a normal-temperature preparation process; S3, a pretreated substrate is placed on a magnetron sputtering sample table, the target materials prepared in steps S1 and S2 are respectively installed on corresponding radio frequency sputtering targets, and the background of a magnetron sputtering system is vacuumized; S4, high-purity argon gas is used as a sputtering gas, and a wide-bandgap perovskite thin film is prepared by using a magnetron co-sputtering method; the sputtering power of the inorganic target material prepared in step S1 is controlled, the sputtering power of the organic target material prepared in step S2 is controlled, and the thickness of the thin film is controlled, so that the high-quality thin film is prepared by using the differential target material preparation process.

This invention belongs to the field of scintillator material preparation technology, specifically relating to a method for purifying high-purity cesium iodide and its application in the preparation of cesium iodide scintillator screens. The method involves sequentially mixing and heating cesium iodide-containing waste and residual materials to dissolve them, filtering and removing impurities, adsorption and removing impurities, concentrating and temperature-controlled crystallization, centrifuging, drying, and vacuum packaging. This process comprehensively removes solid particulate impurities, elemental iodine, and various trace metal ions from the raw materials, effectively preventing oxidation and deterioration during purification. The method is simple to operate, highly industrially feasible, and can purify waste materials to a high purity level that meets the requirements of high-performance applications. It allows for the reuse of waste materials at the same purity level, reducing production costs, alleviating raw material supply pressure, and complying with environmental protection requirements. Applying the high-purity cesium iodide obtained by this method to the preparation of cesium iodide scintillator screens using a vacuum thermal evaporation process ensures the excellent performance of the scintillator screens, making them suitable for high-end fields such as medical imaging and non-destructive testing.

This invention relates to an inorganic perovskite thin film, its preparation method, and a solar cell. The method includes the following steps: S1: forming a first thin film through a first vapor deposition process; S2: annealing the first thin film to obtain a second thin film; S3: forming a third thin film on the second thin film through a second vapor deposition process; and S4: annealing the second thin film and the third thin film to obtain the inorganic perovskite thin film; wherein, in the first vapor deposition process, the raw materials used for evaporation include cesium bromide and lead iodide; and in the second vapor deposition process, the raw materials used for evaporation include cesium iodide and lead iodide. The inorganic perovskite thin film prepared by the method of one embodiment of this invention, compared with existing inorganic perovskite thin films, improves the phase stability of the perovskite structure without affecting the light absorption range of the prepared solar cell, and simultaneously improves the photoelectric conversion efficiency of the cell.

The application belongs to the technical field of photoelectric materials and devices, and particularly relates to a perovskite film and a preparation method and application thereof. A fluorine-containing phosphazene compound is used as a ligand, mixed with a perovskite precursor solution composed of lead iodide, formamidinium iodide and cesium iodide, and then spin-coated. The fluorine-containing phosphazene compound forms a hydrogen bond with part of the formamidinium cations, anchors the part of the formamidinium cations at the bottom of the perovskite film, and makes the Cs-formamidinium cations uniformly distributed. Meanwhile, the fluorine-containing phosphazene compound forms a coordination bond with Pb 2+ , passivates Pb 2+ defects, and the perovskite film is obtained through an anti-solvent treatment and an annealing treatment. The fluorine-containing phosphazene compound interacts with components in the perovskite precursor solution, can increase a nucleation rate of the perovskite, slow down a crystallization rate, eliminate a tensile stress, and not enter a crystal lattice, thereby guaranteeing stability and crystallinity of the film. The perovskite film can be used for an inverted perovskite solar cell, and can improve device performance and stability.

The application discloses a laser photolysis-infrared spectrum combined technology-based atmospheric cl intermediates generation and detection system and a detection method, and the system comprises a low-pressure flow tube sampling module, a excimer laser photolysis module, a high-vacuum ultralow-temperature reaction cell module and an in-situ Fourier transform infrared spectrum detection module; the low-pressure flow tube sampling module is used for conveying mixed gas to the high-vacuum ultralow-temperature reaction cell module; the excimer laser photolysis module is used as a photolysis source and is guided to the high-vacuum ultralow-temperature reaction cell module through an optical path; and the in-situ Fourier transform infrared spectrum detection module is used for collecting and analyzing infrared spectrum of a captured sample on a cesium iodide cold window surface of the high-vacuum ultralow-temperature reaction cell module. Through the low-pressure flow tube premixing and the working mode of "photolysis and deposition simultaneously", the application can efficiently and in-situ generate CIs in an ultralow-temperature matrix isolation environment, and realize high-sensitivity and high-specificity infrared detection.

The application belongs to the technical field of lead-bismuth fast reactor supporting test, and particularly relates to a liquid lead-bismuth environment fission product evaporation behavior test system and method. The application comprises a reaction tank, a temperature control system, an atmosphere control system, a reactant storage system and a sampling analysis system; the reaction tank is used for bearing liquid lead-bismuth and fission products, the temperature control system is used for realizing accurate control of the temperature of the reaction tank; the atmosphere control system is used for providing a controllable gas phase environment, the reactant storage system is used for storing iodine and cesium iodide, quantitative injection of iodine and cesium iodide is realized by adjusting inert gas pressure and flow of an inert gas driven injection unit, and the sampling analysis system is used for realizing measurement of evaporation product composition and particle size distribution. The application realizes accurate regulation and control of temperature, pressure and gas phase environment through modular design, and can carry out saturated vapor partial pressure, evaporation rate and aerosol characteristic research of fission products.