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A method for preparing perovskite solar cells based on two-dimensional flower-like material molybdenum disulfide

A technology of solar cells and molybdenum disulfide, applied in circuits, photovoltaic power generation, electrical components, etc., to achieve stable device performance, improve hysteresis, and novel methods

Active Publication Date: 2021-09-17
SUZHOU UNIV
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Problems solved by technology

[0003] Aiming at the disadvantages of ion migration in the additives of the existing commonly used hole transport layer during the oxidation process, resulting in many film stability defects, non-dense film, and exposure of the lower layer of perovskite, the present invention provides a two-dimensional flower-based A method for preparing perovskite solar cells from molybdenum disulfide, which is a non-toxic two-dimensional material as an additive, effectively inhibits the ion migration of the additive during the oxidation process without changing the device manufacturing process , reducing film defects, making the device stable and improving the photoelectric conversion efficiency of the device

Method used

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  • A method for preparing perovskite solar cells based on two-dimensional flower-like material molybdenum disulfide
  • A method for preparing perovskite solar cells based on two-dimensional flower-like material molybdenum disulfide
  • A method for preparing perovskite solar cells based on two-dimensional flower-like material molybdenum disulfide

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Embodiment 1

[0029] Example 1: Preparation of perovskite solar cells with molybdenum disulfide doped hole transport layer precursor solution:

[0030] The synthetic method of molybdenum disulfide is as follows: 1.2410g (NH 4 ) 6 Mo 7 o 24▪ 4H2 O and 1.0629 g thioacetamide CH 3 CSNH 2 Mix and stir for 0.5 hours until the solution is homogeneously mixed. The mixed solution was transferred to a 50mL polytetrafluoroethylene reactor and sintered at 220°C for 6 hours. The obtained product was repeatedly washed with ethanol and ultrapure water for three times, and the obtained product was dried in a vacuum drying oven at 80 degrees Celsius to obtain the final product.

[0031] The device structure of the battery is: FTO / TiO 2 / Perovskite layer (Perovskite) / Spiro-OMeTAD / MoO 3 / Ag

[0032] The preparation method of the precursor solution of the hole transport layer in this example is as follows: 5 mg MoS 2 Dissolved in 3 mL of acetonitrile solvent, the solution turned light blue after fil...

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Abstract

The present invention provides a method for preparing a perovskite solar cell based on two-dimensional flower-shaped material molybdenum disulfide, comprising the following steps: (1) depositing an electron transport layer TiO on the processed FTO substrate 2 ; (2) Prepare the perovskite precursor solution; (3) deposit the perovskite precursor solution prepared in step (2) on TiO 2 The thin film was prepared on the FTO substrate by spin coating, and the substrate was transferred to the heating table for annealing after spin coating; (4) The molybdenum disulfide precursor additive was added to the precursor solution of the hole transport layer, and the (5) Depositing thin film molybdenum trioxide and silver electrodes on the hole transport layer prepared in step (4) by thermal evaporation technology. This method improves the photoelectric conversion efficiency and stability of perovskite solar cells.

Description

technical field [0001] The invention belongs to the field of photovoltaic devices, in particular to a method for preparing perovskite solar cells based on molybdenum disulfide, a two-dimensional flower-shaped material. Background technique [0002] Planar organic-inorganic hybrid perovskite solar cells have attracted extensive attention due to their unique optical properties and simple fabrication process. In recent years, people have conducted a series of in-depth research on materials, thin film preparation technology, device structure and physical mechanism, and its photoelectric conversion efficiency has exceeded 22%. However, the research on the stability of perovskite solar cells is relatively lagging behind. The defects of perovskite and device group materials prevent it from being produced in a large area and the stability of device performance is poor. The stability problem has become a constraint on the development of perovskite cells. the bottleneck. There are m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/46H01L51/48
CPCH10K71/10H10K85/00H10K30/10H10K30/80H10K2102/00Y02E10/549
Inventor 王照奎廖良生姜璐璐
Owner SUZHOU UNIV
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