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Based on pbbr 2 Micropore-regulated all-inorganic cspbbr 3 Perovskite solar cell and its preparation method and application

A solar cell and perovskite technology, which is applied in the manufacture of circuits, electrical components, and final products, and can solve problems such as improving the photoelectric conversion efficiency of cells

Active Publication Date: 2021-05-18
青岛亿恩方能源环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above two problems are not conducive to the further improvement of the photoelectric conversion efficiency of this type of battery. Therefore, the development of a large grain CsPbBr 3 The preparation method of perovskite film and the modification technology to accelerate the extraction of interfacial charges are of great importance to promote the development of all-inorganic CsPbBr 3 The commercialization process of perovskite solar cells has important theoretical significance and practical value

Method used

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  • Based on pbbr <sub>2</sub> Micropore-regulated all-inorganic cspbbr <sub>3</sub> Perovskite solar cell and its preparation method and application
  • Based on pbbr <sub>2</sub> Micropore-regulated all-inorganic cspbbr <sub>3</sub> Perovskite solar cell and its preparation method and application
  • Based on pbbr <sub>2</sub> Micropore-regulated all-inorganic cspbbr <sub>3</sub> Perovskite solar cell and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0016] This embodiment provides a PbBr-based 2 All-inorganic CsPbBr prepared by micropore regulation 3 Film, which is obtained by the following preparation method:

[0017] (1), 840~860 mg SnCl 2 and 330~350 mg CH 4 N 2 Dissolve S in 25-35 mL deionized water, and stir at high speed for 20-40 h in an open container at room temperature. The white precipitate was removed by centrifugation, and filtered with a PTFE filter membrane to obtain yellow and transparent SnO 2 Quantum dot solution.

[0018] (2) Put the conductive surface of the FTO conductive glass upwards and place it in a plasma cleaning machine for cleaning. The cleaning time is 5 to 10 minutes. The SnO described in (1) 2 The quantum dot solution and the FTO conductive glass after plasma cleaning are preheated on the heating table, and the preheating temperature is 70~90 o C, SnO 2 The preheating time of the quantum dot solution is 15-30 minutes, and the preheating time of the FTO conductive glass is 3-12 minu...

Embodiment 2

[0028] The PbBr-based 2 All-inorganic CsPbBr prepared by micropore regulation 3 Film, which is obtained by the following preparation method:

[0029] (1), 853 mg SnCl 2 and 338 mg CH 4 N 2 S was dissolved in 30 mL deionized water and stirred at room temperature for 36 h in an open container. Centrifuge to remove the white precipitate, and filter with PTFE membrane to obtain yellow transparent SnO 2 Quantum dot solution.

[0030] (2) Place the FTO conductive glass with the conductive side up in the plasma cleaner for 5 minutes. The SnO prepared in step 1 2 The quantum dot solution and the FTO conductive glass after plasma cleaning were placed at 80 o Preheated on the heating stage of C, SnO 2 The preheating time of the quantum dot solution is 20 minutes, and the preheating time of the FTO conductive glass is 5 minutes.

[0031] (3), the preheated SnO 2 The quantum dot solution was spin-coated on the preheated FTO conductive glass at a speed of 2000 rpm / s for 30 s. A...

Embodiment 3

[0038] Embodiment 3, the performance test of the prepared perovskite solar cell

[0039] 1. Test the FTO / SnO prepared under different crystallization temperature conditions 2 / PbBr 2 Film photos, surface SEM images and cross-sectional SEM images, such as figure 1 shown.

[0040] from figure 1 It can be seen that in Fig. a 1 -a 8 respectively at 20~25 o C, 35~45 o C, 67~72 o C, 78~82 o C, 88~92 o C, 98~102 o C, 108~112 o C, 118~122 o PbBr prepared at the crystallization temperature of C 2 The photo of the film, it can be seen that as the crystallization temperature increases, the PbBr 2 The film changes from transparent to translucent or even opaque. Figure b 1 -b 8 and c 1 -c 8 respectively at 20-25 o C, 35-45 o C, 67-72 o C, 78-82 o C, 88-92 o C, 98-102 o C, 108-112 o C, 118-122 o PbBr prepared at the crystallization temperature of C 2 Surface and cross-sectional SEM images of the film. It can be seen from the figure that as the crystallization te...

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Abstract

The present invention provides based on PbBr 2 Micropore-regulated all-inorganic CsPbBr 3 Perovskite solar cells and their preparation methods and applications, specifically spin-coating quantum dot solutions on conductive film substrates to prepare electron transport layers, and then spin-coating PbBr after heating 2 solution, annealed to form PbBr 2 Porous film, followed by multiple spin-coating of CsBr solution to prepare CsPbBr 3 perovskite thin film. By changing PbBr 2 Crystallization temperature regulation of PbBr 2 Porosity in the film to allow rapid diffusion of CsBr to PbBr 2 Preparation of Large Grain CsPbBr in Thin Films 3 film. PbBr 2 The microporous structure of the film is large grain CsPbBr 3 The growth provides space and reduces the residual compressive stress of the perovskite grains. The all-inorganic CsPbBr provided by the present invention 3 The largest crystal grain of the film can reach 1.62 microns, and the solar cells assembled from it have good stability and high photoelectric conversion rate, which has important practical and economic value for promoting the industrialization process of perovskite solar cells.

Description

technical field [0001] The invention belongs to the field of new materials and new energy technologies, in particular to a PbBr-based 2 Micropore-regulated all-inorganic CsPbBr 3 Perovskite solar cell and its preparation method and application. Background technique [0002] Energy shortages, environmental pollution and ecological damage caused by excessive use of fossil fuels such as coal, oil, and natural gas have become major challenges facing mankind. The development of renewable and clean energy is a strategic choice to achieve sustainable development of the world economy. Among the many new energy sources, solar energy is inexhaustible and inexhaustible, so the development and efficient use of solar energy is considered to be one of the cores of the future energy development strategy. A solar cell is a device that converts solar energy into electrical energy. Among them, perovskite solar cells are developing rapidly, and their photoelectric conversion efficiency has j...

Claims

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Application Information

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IPC IPC(8): H01L31/032H01L31/0352H01L31/18
CPCH01L31/032H01L31/035218H01L31/18Y02P70/50
Inventor 唐群委赵媛媛段加龙王宇迪杨希娅
Owner 青岛亿恩方能源环保科技有限公司
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