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Preparation method of tin-lead hybrid perovskite battery passivated by p-phenyldimethylamine iodide

A technology of phenyldimethylamine iodide and methylamine iodide is applied in the field of preparation of tin-lead mixed perovskite solar cells, which can solve the problems of high formation energy and reduce the trap density of perovskite film, and achieves Improved crystallinity and morphology, reduced defect density, and improved performance and stability

Active Publication Date: 2022-07-12
滁州捷泰新能源科技有限公司
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Problems solved by technology

In addition, due to the higher formation energy of 2D perovskite, Sn 2+ To Sn 4+ oxidation, thereby reducing the trap density of the perovskite film

Method used

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  • Preparation method of tin-lead hybrid perovskite battery passivated by p-phenyldimethylamine iodide
  • Preparation method of tin-lead hybrid perovskite battery passivated by p-phenyldimethylamine iodide
  • Preparation method of tin-lead hybrid perovskite battery passivated by p-phenyldimethylamine iodide

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Embodiment Construction

[0025] The preparation method of the present embodiment is as follows:

[0026] 1)FA 0.7 MA 0.3 Pb 0.5 Sn 0.5 I 3 Preparation of Perovskite Precursor Solution

[0027] First, 168.5 mg of formamide iodide (FAI), 66.8 mg of methylamine iodide (MAI), 322.7 mg of PbI 2 , 260.8mg of SnI 2 , 11.0mg SnF 2 750 μL of dimethylformamide (DMF) and 250 μL of dimethyl sulfoxide (DMSO) were added, followed by adding 0-4 mol% PhDMADI to the mixed solution. Subsequently, the precursor solution was stirred at 60 °C for 2 h and then filtered with a 0.20 μm polytetrafluoroethylene (PTFE) filter to finally obtain 1.4 M FA 0.7 MA 0.3 Pb 0.5 Sn 0.5 I 3 Perovskite precursor solution.

[0028] 2) ITO glass cleaning

[0029] First, use glass detergent to clean the ITO glass substrate (15×15mm 2 ), rinsed repeatedly with deionized water, then ultrasonically treated with acetone and isopropanol for 15 min in turn, dried with nitrogen, and finally treated in a UV-ozone cleaning machine for ...

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Abstract

The invention discloses a preparation method of a tin-lead mixed perovskite solar cell passivated by p-phenyldimethylamine iodide. First, FA is prepared. 0.7 MA 0.3 Pb 0.5 Sn 0.5 I 3 Perovskite precursor solution, spin-coated (3,4-ethylenedioxythiophene)-polystyrenesulfonic acid aqueous solution on cleaned ITO glass to obtain PEDOT:PSS film; transfer the ITO substrate to nitrogen-protected gloves box, place the FA 0.7 MA 0.3 Pb 0.5 Sn 0.5 I 3 The perovskite precursor solution was spin-coated on top of the PEDOT:PSS film, chlorobenzene was dropped onto the substrate, the ITO substrate was transferred to a vacuum coater, and the electrotransport layer and interface were sequentially deposited on the perovskite film. Layer bath copper and electrodes. The invention greatly reduces the defect density of the thin film, improves the crystallinity and morphology of the thin film, and significantly improves the performance and stability of the prepared battery.

Description

technical field [0001] The invention relates to a preparation method of a solar cell, in particular to a preparation method of a tin-lead mixed perovskite solar cell passivated by p-phenyldimethylamine iodide. Background technique [0002] At present, the conversion efficiency of single-junction pure lead-based perovskite solar cells has reached 25.5%, but the band gap of its light absorption layer is 1.5-1.6 eV, which is not an ideal light absorption material for sunlight. By adjusting the lead / tin (Pb / Sn) ratio, the Pb / Sn hybrid perovskite can achieve a narrow bandgap of 1.25 eV, which can be applied not only to single-junction solar cells but also to tandem solar cells. In the structure of monolithic all-perovskite tandem solar cells, wide-bandgap Pb-based perovskites and narrow-bandgap Pb / Sn-based hybrid perovskites act as light-absorbing layers for the top and bottom subcells, respectively, enabling the The efficiency of perovskite tandem solar cells reached 24.8%. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/48H01L51/46H01L51/42
CPCH10K71/311H10K85/30H10K30/30Y02E10/549
Inventor 黄仕华章磊池丹康桥李林华
Owner 滁州捷泰新能源科技有限公司
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