Nano titanium dioxide sol for perovskite solar cell and preparation method of skeleton membrane

A solar cell and perovskite technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of restricting the development of polymer thin film perovskite solar cells and the application of polymer transparent materials , complex preparation process and other issues, to achieve the effect of reducing photocatalytic ability, improving chemical stability, and improving moisture resistance

Active Publication Date: 2016-08-17
江苏弘讯和新能源有限公司
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AI Technical Summary

Problems solved by technology

[0011] The nano-titanium dioxide framework layer of existing perovskite solar cells needs to go through a high-temperature sintering process above 500°C. The preparation process is complicated and the cost is high. It cannot be applied to polymer transparent materials, which limits the development of polymer thin film perovskite solar cells.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In a 100mL glass reactor, 10.4g of absolute ethanol, 4g of deionized water and 4g (20mmol) of acetic acid (20mmol) with a mass percent concentration of 30% were added respectively to make the pH of the solution 2-3; tetrabutyl titanate 6.8g ( 20mmol) mixed with 6.8g (68mmol) of acetylacetone solvent, dropwise added to the glass reactor solution, under constant stirring, the tetrabutyl titanate was hydrolyzed and polymerized at 5-10°C for 1-2h, and the reaction formed Pale yellow nano-TiO with a concentration of 5% by mass 2 The sol was 32g, and the average particle diameter of the nanoparticles in the sol was measured to be 5nm.

[0038] Add 20g of absolute ethanol, 4g of deionized water and 0.4g (6mmol) of 25% ammonia water in a 100mL glass reactor respectively, so that the pH of the solution is 10-11; Add it to the glass reactor solution, carry out hydrolysis and polymerization reaction at 10-30°C for 24-72 h, and obtain nano-SiO 2 Alkaline sol, heated to reflux for...

Embodiment 2

[0043] PbI 2 Reagent 46.1g (100mmol) and CH 3 NH 3 Add 15.9g (100mmol) of reagent I into 200g dimethylformamide solvent, stir at 60-70°C for 12 h to obtain CH 3 NH 3 PB 3 Light-absorbing layer coating liquid. Use a needle tube to drop the light-absorbing layer coating liquid on the nano-TiO prepared in Example 1. 2 On the skeleton film, use a stainless steel wire bar coater to coat evenly, place it in a vacuum glove box to evaporate the solvent and dry it. The thickness of the light-absorbing layer reaches 500-600nm, and finally dry it with hot air at 90-110°C for 30 minutes. The light-absorbing layer The surface resistance decreases rapidly, and the color quickly changes from reddish brown to black, forming a black perovskite light-absorbing layer with a smooth surface and uniform coverage.

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Abstract

The invention relates to nano titanium dioxide sol for a perovskite solar cell and a preparation method of a skeleton membrane. Large-particle size nano SiO2 sol and a small amount of small-particle size organic silicon nano resin sol are added to small-particle size nano TiO2 sol; small-particle size nano TiO2 and large-particle size nano SiO2 are subjected to copolymerization reaction and coat the surfaces of large-particle size nano SiO2 particles to form core-shell structure nano TiO2 particles; and a small amount of small-particle size organic silicon nano resin further partially coats the core-shell structure nano TiO2 particles, so that the small-particle size organic silicon nano resin is firmly bonded to the surface of a substrate material and is combined to form the core-shell structure nano TiO2 skeleton membrane. By core-shell structure nano TiO2 particles, the contradiction between the adhesive force and the pore capacity of the nano TiO2 skeleton membrane is avoided; a flexible molecular group is introduced into the skeleton membrane; and high adhesive force of a membrane layer is further enhanced, so that the high-temperature sintering process of the nano TiO2 skeleton membrane is omitted.

Description

technical field [0001] The invention relates to a method for preparing a perovskite solar cell nano-titanium dioxide sol and a skeleton film, in particular to a preparation method for a non-sintering-free core-shell structure nano-titanium dioxide skeleton film, which belongs to the field of new energy and new materials. technical background [0002] Solar cells based on organic metal halide perovskite structured light-absorbing materials are called perovskite solar cells. At present, their photoelectric conversion efficiency has exceeded 20%, and it is expected to reach 50% in the future. Perovskite solar cells only need to load the perovskite light-absorbing material on the nano-skeleton material to make the perovskite light-absorbing layer and realize photoelectric conversion. It is not only easy to mass-produce, but also the expected manufacturing cost is very low. Breakthroughs can bring new hope to the solar energy industry. In the future, colored thin-film batteries w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/48B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H10K71/00H10K30/35H10K2102/00Y02E10/549
Inventor 李建生刘炳光卢俊锋胡兴兰白净伊董崇文
Owner 江苏弘讯和新能源有限公司
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