Perovskite precursor solution, preparation method and application thereof

A perovskite precursor and precursor solution technology, applied in the field of perovskite precursor solution and its preparation, can solve the problems of unfavorable saving of production cost, unfavorable commercial application, high weighing accuracy requirements, and achieve less defects, The effect of good air stability and low raw material cost

Pending Publication Date: 2021-05-28
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the invention introduces 3,4-dichloroaniline into the perovskite precursor, which is not conducive to saving production costs, and formamidine iodide, cesium iodide, methyl bromide and lead iodide require high weighing accuracy, which is not conducive Good for commercial application
[0007] It can be seen that how to provide a perovskite precursor solution and its preparation method, simplify the preparation process, avoid the instability of raw materials and the aging of precursors, and improve the repeatability of film formation and device efficiency, has become the current technology in this field. Issues that personnel urgently need to address

Method used

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  • Perovskite precursor solution, preparation method and application thereof
  • Perovskite precursor solution, preparation method and application thereof
  • Perovskite precursor solution, preparation method and application thereof

Examples

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Embodiment 1

[0051] This embodiment provides a perovskite precursor solution and a preparation method thereof, the preparation method comprising the following steps:

[0052] (1) Mix 753.2mg of FAPbI at 65°C for 20min at a rate of 800rpm 3 powder and polar solvent to obtain FAPbI 3 An intermediate precursor solution with a concentration of 1.5mol / L; the composition of the polar solvent is: 80% N,N-dimethylformamide+20% dimethyl sulfoxide (V / V);

[0053] (2) Mix 100.6 mg of MAPbBr at 65°C for 20 min at a rate of 800 rpm 3 The single crystal and the intermediate precursor solution obtained in step (1) are filtered through a polytetrafluoroethylene filter membrane with an average pore diameter of 0.22 μm to obtain a perovskite precursor solution.

[0054] In this example, the MAPbBr 3 Single crystal with FAPbI 3 The molar ratio of the powder is 0.15:0.85.

Embodiment 2

[0056] This embodiment provides a kind of perovskite precursor solution and preparation method thereof, in the preparation method except described MAPbBr 3 Single crystal with FAPbI 3 The mol ratio of powder is changed into 0.2:0.8, that is to say FAPbI described in step (1) 3 The quality of powder is changed into 708.8mg, and step (2) described MAPbBr 3 The mass of the single crystal was changed to 134.1 mg, and the rest of the conditions were the same as in Example 1, so details are not repeated here.

Embodiment 3

[0058] This embodiment provides a kind of perovskite precursor solution and preparation method thereof, in the preparation method except described MAPbBr 3 Single crystal with FAPbI 3 The mol ratio of powder is changed into 0.1:0.9, that is to say FAPbI described in step (1) 3 The quality of powder is changed into 797.5mg, and step (2) described MAPbBr 3 The mass of the single crystal was changed to 67.1 mg, and the rest of the conditions were the same as in Example 1, so details are not repeated here.

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Abstract

The invention provides a preparation method of a perovskite precursor solution. The preparation method comprises the following steps: (1) mixing FAPbI3 powder and a polar solvent to obtain an intermediate precursor solution; and (2) mixing a MAPbBr3 single crystal with the intermediate precursor solution obtained in the step (1) to obtain a perovskite precursor solution. According to the invention, a perovskite precursor solution is prepared from FAPbI3 powder and a MAPbBr3 single crystal which are good in stability, low in cost and easy to obtain, so that the preparation process is simplified, the phenomena of instability of raw materials and precursor aging are avoided, and the film forming repeatability and the device efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of perovskite solar cells, and relates to a perovskite precursor solution, in particular to a perovskite precursor solution and a preparation method and application thereof. Background technique [0002] Perovskite solar cells are a new generation of solar cells with the fastest development in photoelectric conversion efficiency. Compared with commercial crystalline silicon solar cells, they have the advantages of cheap raw materials, solution processing, and large-scale preparation, so they have broad applications. market expectation. [0003] Perovskite solar cells are mainly composed of a perovskite layer as a light-absorbing layer, an electron / hole transport layer sandwiching a perovskite layer, and an outermost cathode / anode electrode. Each layer can be processed into a thin film by a solution method. Perovskite layer is with ABX 3 In the perovskite material with a crystal structure, the A site is mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/46H01L51/42
CPCH10K71/00H10K85/30H10K30/30Y02E10/549Y02P70/50
Inventor 王湘麟王建涛徐景林小淞余成卓刘恒祁幸男
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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