Method for preparing NH4PbIxCl3-x perovskite photoelectric material by grinding

Abstract

The invention provides a method for preparing an NH4PbIxCl3-x perovskite photoelectric material by grinding. The method comprises the following steps of: (1) mixing ammonium chloride and lead iodide,and putting the mixture into a ball mill for fully grinding; wherein the molar ratio of the ammonium chloride to the lead iodide is 1:1-3:1, the grinding time of the ball mill is 1-2h, the grinding rotating speed of the ball mill is 200-400 revolutions per minute, and the mass ratio of materials in the ball mill to grinding balls is 1:20-1:10; and (2) putting the mixture fully ground in the step (1) into a vacuum drying oven for heating, and performing cooling to room temperature to obtain the NH4PbIxCl3-x perovskite photoelectric material. The preparation process is simple and easy to control, the preparation cost is low, and the NH4PbIxCl3-x perovskite photoelectric material obtained by the method has a proper band gap and is expected to be applied to photovoltaic cells.

Description

【Technical field】 [0001] The invention relates to the field of preparation of perovskite materials, in particular to a method for grinding and preparing NH 4 PB x Cl 3-x Approaches to perovskite optoelectronic materials. 【Background technique】 [0002] Perovskite materials have great application prospects in the field of photovoltaics due to their strong light absorption intensity, high carrier mobility and suitable band gap. However, the commonly used preparation methods of perovskite photoelectric materials, such as the solution method, have bottlenecks such as complicated processes and dependence on various expensive and toxic organic solvents, which hinder the commercialization of perovskite solar cells, so the production cost of perovskite photoelectric materials The reduction and simplification of the preparation process have been paid more and more attention. The mechanochemical method has the advantages of no solvent, simple operation and low cost, and has gradua...

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Problems solved by technology

However, the commonly used preparation methods of perovskite photoelectric materials, such as solution method, have bottlenecks such as complicated process and dependence on various expensive and toxic organic solvents, which hinder the commercialization of perovskite solar cells, so the production cost of perovskite photoelectric materials The reduction and simplification of the preparation process are getting more and more attention

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