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Perovskite film and perovskite solar cell and preparation method thereof

A solar cell and perovskite technology, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problems that are not suitable for the preparation of large-area and uniform perovskite films, so as to improve photoelectric conversion performance and long-term stability, crystallization The effect of high precision and simple method

Active Publication Date: 2022-05-03
HANGZHOU MICROQUANTA SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods require precise control in the regulation of the perovskite crystallization process, and are not suitable for the preparation of large-area uniform perovskite films.

Method used

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  • Perovskite film and perovskite solar cell and preparation method thereof
  • Perovskite film and perovskite solar cell and preparation method thereof
  • Perovskite film and perovskite solar cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A method for preparing a perovskite solar cell as described above is provided, comprising the steps of:

[0052] R1. Prepare perovskite precursor solution: dissolve 0.159g methylammonium iodide and 0.461g lead iodide in a mixed solvent of dimethyl sulfoxide and N,N-dimethylformamide, the volume of the two The ratio is 1:9, and the mass fraction of solute is 45wt%.

[0053] R2. Preparation of 4-iodopyrazole mixed solution: Weigh a certain amount of 4-iodopyrazole powder and add it to the fully dissolved perovskite precursor solution. The mass fraction of 4-iodopyrazole is 1 wt%.

[0054] R3. Cleaning the substrate: Use cleaning agent, deionized water, acetone, and isopropanol to ultrasonically clean the FTO conductive glass, dry it with nitrogen, and then treat it with UV-ozone for half an hour.

[0055] R4. Preparation of the electron transport layer: Spin-coat a tin oxide-isopropanol solution with a particle diameter of 2 nm to 10 nm and a mass fraction of 2.5% on the...

Embodiment 2

[0061] Provide another method for preparing a perovskite solar cell as described above, comprising the steps of:

[0062] S1. Cleaning the substrate: Use cleaning agent, deionized water, acetone, and isopropanol to ultrasonically clean the ITO conductive glass, dry it with nitrogen, and then treat it with UV-ozone for half an hour.

[0063] S2. Preparation of the hole transport layer: spin-coat the PTAA chlorobenzene solution with a concentration of 10 mg / mL on the substrate, and bake at 150° C. for 10 min to obtain a hole transport layer with a film thickness of 30 nm.

[0064] S3. The substrate deposited with the hole transport layer is placed in the film forming cavity, and the vacuum degree in the film forming cavity is controlled at 10 -8 Pa~10 5 Between Pa, the substrate is heated at the same time, and the heating temperature of the substrate is controlled at 30°C to 150°C.

[0065] S4. The precursors lead iodide, lead bromide, methyl hydrobromide, formamidine hydriodi...

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Abstract

The invention relates to a perovskite thin film, which contains a perovskite semiconductor compound, and the chemical formula of the perovskite semiconductor compound is ABX 3 , a modified compound is added to the perovskite film, and the modified compound combines with the perovskite semiconductor compound to form a complex structure, which can regulate the growth process of the perovskite crystal and obtain a uniform and dense perovskite Ore thin films, thereby improving the photoelectric conversion performance and long-term stability of perovskite solar cells. The modified compound is 4-iodopyrazole. The invention also discloses a perovskite solar cell containing the perovskite film and a preparation method thereof. The invention effectively regulates the crystallization behavior of the perovskite to obtain a uniform and dense perovskite film with high crystallinity, and the method is simple and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of perovskite solar cell preparation, and in particular relates to a perovskite thin film, a perovskite solar cell and a preparation method thereof. Background technique [0002] Perovskite solar cells are a new and highly efficient photovoltaic technology. At present, the small-area perovskite solar cells reported by the laboratory have achieved a photoelectric conversion efficiency of more than 20% by rapidly preparing perovskite crystals through a solution method. However, the process of crystallization of perovskite from solution is full of great disorder, resulting in the prepared film prone to holes and crystals of different sizes. [0003] Effective regulation of the crystallization process of perovskite crystals is of great significance for the preparation of high-quality thin films. In the patent with the publication number CN107394045A, it is introduced to add a polar low boiling point solvent an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K85/30H10K30/10Y02E10/549
Inventor 不公告发明人
Owner HANGZHOU MICROQUANTA SEMICON CO LTD