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Wide preparation window and preparation method of spontaneous textured perovskite solar cell

A solar cell and perovskite technology, applied in the field of solar cells, can solve the problems that the surface of perovskite cannot be textured and has no reliable method, so as to achieve the effect of improving fault tolerance and production efficiency

Active Publication Date: 2020-03-06
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, traditional crystalline silicon solar cells need to prepare texture on the surface of the cell to improve the spectral response, thereby increasing the short-circuit current of the cell.
However, there is no reliable method for preparing texture on the surface of perovskite. There are already some methods, such as patent CN106229411A which provides a perovskite solar cell with a back reflection substrate, which realizes back reflection by making texture on the substrate, but the perovskite The surface cannot be textured

Method used

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  • Wide preparation window and preparation method of spontaneous textured perovskite solar cell
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  • Wide preparation window and preparation method of spontaneous textured perovskite solar cell

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Embodiment 1

[0021] 1. The suede FTO glass is ultrasonically passed through acetone, alcohol, and isopropanol for 15 minutes respectively, and then blown dry with nitrogen. Among them, the haze of FTO glass is not less than 17%, and the sheet resistance is not higher than 7omh / sq. Before use , by UV-ozone treatment for 15 min.

[0022] 2. Prepare the electron transport layer. The material of the electron transport layer is titanium oxide with a thickness of 30nm. The specific steps are to immerse the cleaned FTO glass into a 0.2M titanium tetrachloride aqueous solution, and the aqueous solution is heated from room temperature to 70°C , lasted for 75 minutes, after that, rinsed with deionized water, and then dried with nitrogen gas for later use.

[0023] 3. Dissolve 3.507g of cesium iodide, 0.76g of methylamine bromide, 2.48g of lead bromide, 59.12g of lead iodide, and 19.74g of formamidine iodide into 100mL of a mixed solvent to obtain a perovskite precursor solution, Among them, the mix...

Embodiment 2

[0030] 1. The suede FTO glass is ultrasonically passed through acetone, alcohol, and isopropanol for 15 minutes respectively, and then blown dry with nitrogen. Among them, the haze of FTO glass is not less than 17%, and the sheet resistance is not higher than 7omh / sq. Before use , by UV-ozone treatment for 15 min.

[0031] 2. Prepare the electron transport layer. The material of the electron transport layer is titanium oxide with a thickness of 30nm. The specific steps are to immerse the cleaned FTO glass into a 0.2M titanium tetrachloride aqueous solution, and the aqueous solution is heated from room temperature to 70°C , lasted for 75 minutes, after that, rinsed with deionized water, and then dried with nitrogen gas for later use.

[0032] 3. Dissolve 3.507g of cesium iodide, 0.76g of methylamine bromide, 2.48g of lead bromide, 59.12g of lead iodide, and 19.74g of formamidine iodide into 100mL mixed solvent to obtain a perovskite precursor solution, wherein , the mixed solv...

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Abstract

The invention belongs to the technical field of solar cells, and particularly relates to a wide preparation window and a preparation method of a spontaneous textured perovskite solar cell. Firstly, anelectron transport layer is prepared, and then a perovskite layer, a hole transport layer and an electrode are prepared. The perovskite layer is obtained through the steps of perovskite solution coating, wet film reduced pressure distillation, annealing and the like. The perovskite solution is obtained by dissolving perovskite precursors (cesium iodide, lead iodide, lead bromide, formamidine iodide and methylamine bromide) into a mixed solvent composed of a high-volatility solvent and a low-volatility solvent. In the reduced pressure distillation process, the high volatile solvent is removed,the remaining low-volatility solvent and the perovskite precursors form a complex, so that the stability of an intermediate-state thin film is improved, an annealing window can be greatly prolonged,a suede can be spontaneously formed on the surface of perovskite in the annealing process, the perovskite thin film with the suede can provide a light trapping effect, and the long-wave response of the cell is improved.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a preparation method of a perovskite solar cell with a wide preparation window and a spontaneous textured surface, in particular to a perovskite solar cell with an ultra-wide annealing window and a textured surface spontaneously formed Preparation. Background technique [0002] The development of perovskite solar cells is very rapid. In less than 10 years, the certified efficiency of small-area perovskite solar cells based on formamidine has exceeded 24%. However, large-scale industrial production of perovskite thin-film solar cells Batteries still face challenges. The main reason is that currently certified high-efficiency perovskite batteries are prepared by solution spin coating, which cannot be scaled up. Annealing within the annealing window (the storage time of the intermediate state perovskite film before annealing) can obtain high-quality perovskite, othe...

Claims

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Application Information

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IPC IPC(8): H01L51/48H01L51/42
CPCH10K71/15H10K71/40H10K30/151Y02E10/549Y02P70/50
Inventor 丁建宁李蕊怡袁宁一王书博
Owner CHANGZHOU UNIV
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