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Coating device for mixed solution of precursor and surfactant and use method of coating device

A technology of surfactant and precursor solution, applied in the field of coating equipment for mixed solutions, can solve the problems of multiple pinholes, inability to flatten, and difficulty in infiltration of the electron/hole transport layer, and achieves uniform film thickness distribution and improved Coverage, shrinkage reduction effect

Pending Publication Date: 2020-03-13
HANGZHOU MICROQUANTA SEMICON CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under normal coating conditions, the perovskite solution is hydrophilic, and it is difficult to infiltrate the lipophilic electron / hole transport layer, and the surface of the electron / hole transport layer cannot be paved. After coating the perovskite solution, many shrinkage mouth
If the preparation temperature is higher, such as: 100-180 ° C, it is easy to produce a lot of pinholes, which not only seriously affects the quality of the perovskite battery, but also reduces the conversion efficiency of the perovskite battery

Method used

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  • Coating device for mixed solution of precursor and surfactant and use method of coating device
  • Coating device for mixed solution of precursor and surfactant and use method of coating device
  • Coating device for mixed solution of precursor and surfactant and use method of coating device

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preparation example Construction

[0054]The present invention also discloses a method for preparing a perovskite solar cell. In the process of preparing the perovskite solar cell, the coating equipment for a mixed solution of a precursor and a surfactant as described above is used, including the following steps:

[0055] S1. According to the preparation method of a mixed solution of a precursor and a surfactant as described above, the divalent precursor and the surfactant solution are injected into different raw material bottles, and the two raw material bottles are respectively passed through the pipeline and injected The pump is connected, and the syringe pump sucks the divalent precursor solution and the surfactant solution into the mixing chamber at the same time according to the set volume ratio of 1~1000 for mixing. After stirring, a mixed solution of the precursor and the surfactant is obtained.

[0056] S2. Place the substrate 108 on which the conductive layer and the electron / hole transport layer have ...

Embodiment 1

[0066] The perovskite thin film layer is prepared by using the existing two-step method technology. First, 1mol / L PbI was coated on the substrate prepared with PTAA electron / hole transport layer by slot coating 2 The divalent precursor solution of perovskite, wherein the divalent precursor solvent is DMF and DMSO in the divalent precursor solution of perovskite, and the volume ratio of DMF and DMSO is 9:1, then, to the substrate after coating PbI-containing 2 film layer. Then in PbI 2 A thin film layer of MAI monovalent precursor is prepared on the surface of the thin film layer to obtain a thin film layer of perovskite.

[0067] Among them, PbI 2 Slot coating conditions of divalent precursor solution: at a temperature of 25°C and a humidity of 30%RH, the coating liquid volume is 1ul / cm 2 , the slit width is 100um, and the coating speed is 5cm / s. Drying conditions after coating: hot air drying, the wind speed near the surface of the substrate is 2m / s, the temperature nea...

Embodiment 2

[0070] Using a two-step process, adding a surfactant to the divalent precursor solution coated with perovskite, and then coating the monovalent precursor solution after coating, the following is obtained: Image 6 Schematic cross-sectional view of the shown perovskite thin film layer after coating.

[0071] Conductive layer 11 and electron / hole transport layer 12-2 are sequentially prepared on the substrate, and the perovskite thin film layer 16 prepared on electron / hole transport layer 12-2, due to the electron / hole transport layer 12- 2 is coated with a divalent precursor solution of perovskite containing a surfactant, and the lower surface of the perovskite thin film layer 16 has a surfactant 17. In the illustration, the dots of surfactant 17 are hydrophilic groups, and the curves are lipophilic groups. The hydrophilic groups are distributed on the side close to the perovskite thin film layer 16 , while the lipophilic groups are distributed on the air side of the lipophili...

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Abstract

The invention relates to a coating device for a mixed solution of a precursor and a surfactant. The device comprises a coating die head, a die head lifting table, a post-processing device, a coating platform and a conveying device, a to-be-coated substrate is coated by the coating die head and then is conveyed to the post-processing device by the conveying device for post-processing, and under thedriving of the conveying device, the relative movement is generated between the die head lifting table and the coating platform. The coating die head is communicated with an injection pump with a mixing cavity through a guide pipe, the injection pump is communicated with at least two raw material bottles, one raw material bottle is filled with a divalent precursor solution, and the other raw material bottle is filled with a surfactant solution. The injection pump respectively and simultaneously sucks the divalent precursor solution and the surfactant solution and injects the divalent precursor solution and the surfactant solution into the mixing cavity for mixing, and the mixed solution is conveyed to the coating die head for use. The invention further discloses a using method and application of the coating device. According to the present invention, the coverage rate of the coating film and the flatness of the surface of the coating film are improved, and the perovskite thin film with more uniform film thickness distribution is obtained.

Description

technical field [0001] The invention belongs to the technical field of perovskite solar cell preparation, and in particular relates to a coating device and method for a mixed solution of a precursor and a surfactant. Background technique [0002] At present, there are mainly spray coating methods, blade coating methods, slit coating methods, ink printing methods, and inkjet printing methods to prepare perovskite solar cells in large areas. Slot Die Coating is one of the most convenient methods for industrially preparing perovskite solar cells on a large scale. It has the advantages of short preparation process cycle, raw material saving, and simple process operation. However, the perovskite solar cells prepared by traditional slit coating have defects such as many holes and serious uneven film thickness, which seriously restrict the large-area preparation and commercialization of perovskite cells by slit coating. application. [0003] Generally, the preparation process o...

Claims

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Application Information

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IPC IPC(8): H01L51/48H01L51/42
CPCH10K71/12H10K30/00Y02E10/549
Inventor 不公告发明人
Owner HANGZHOU MICROQUANTA SEMICON CO LTD
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