Cs4CuSb2Cl12 layered halide double perovskite material and preparation method and application thereof

Abstract

The invention discloses a Cs4CuSb2Cl12 layered halide double perovskite material as well as a preparation method and application of the Cs4CuSb2Cl12 layered halide double perovskite material. The chemical formula of the layered halide double perovskite material is Cs4CuSb2Cl12. The preparation method comprises a solution preparation method and a mechanical force preparation method. The solution preparation method comprises the following steps: mixing a cesium-containing compound, an antimony-containing compound and a copper-containing compound according to a proper molar ratio, and adding the mixture into a mixed solution of an organic solvent and an acid solvent; performing ultrasonic treatment on the obtained solution to obtain black precipitate, and performing centrifugal treatment to separate out the black precipitate; and washing the obtained black precipitate with acetone so as to obtain the black Cs4CuSb2Cl12 layered halide double perovskite material. The mechanical force preparation method comprises the following steps: mixing the cesium-containing compound, the antimony-containing compound and the copper-containing compound according to a proper mass ratio, and putting the mixture into a mortar; grinding the mixture in the mortar to obtain a black product; and scraping off the black product, collecting powder, and washing the powder with acetone to obtain the black Cs4CuSb2Cl12 layered halide double perovskite material. The material provided by the invention has good stability, is friendly to human body and environment, has a direct band gap of 1.77 eV, is simple in preparation method and suitable for industrial production, and has wide application prospects in the photoelectric fields of photovoltaic cells, optical detectors, illumination, display, backlight sources and the like.

Description

technical field [0001] The present invention relates to the field of optoelectronic materials, in particular to a Cs 4 CuSb 2 Cl 12 Layered halide double perovskite material and its preparation method and application. Background technique [0002] Since organic-inorganic lead halide perovskite solar cells were first reported in 2009, halide perovskite is a well-deserved star material. In just a few years, its cell verification efficiency has reached 25.2%. Due to its advantages such as tunable wavelength, high light absorption coefficient, and ultra-long carrier diffusion length, halide perovskites are used in many optoelectronics including photovoltaics, photodetection, lighting, display, laser, and scintillator. The field shines. In recent years, through the joint efforts of domestic and foreign scholars, perovskite materials have made good progress in controllable preparation, photoelectric performance regulation, optoelectronics and even biological applications. How...

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Problems solved by technology

[0005] In view of the above problems, the purpose of the present invention is to provide a layered halide double perovskite material which is non-toxic and has good stability and high electronic dimension and its preparation method, thereby solving the problem of traditional non-layered halide double perovskite materials. The indirect band gap, the band gap is generally large (greater than 3eV), and the effective mass of the carrier is large.

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