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Step-by-step coating device for precursor solution and surfactant and use method of device

A technology of precursor solution and surfactant is applied in the field of perovskite solar cell preparation, which can solve the problems of difficult infiltration of the electron/hole transport layer, lowering the conversion efficiency of perovskite cells, and affecting the quality of perovskite cells, etc. Achieve the effect of optimizing the film-forming properties of perovskite, avoiding solution instability, and broadening the coating process

Active Publication Date: 2020-03-13
HANGZHOU MICROQUANTA SEMICON CO LTD
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  • Summary
  • 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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  • Step-by-step coating device for precursor solution and surfactant and use method of device
  • Step-by-step coating device for precursor solution and surfactant and use method of device
  • Step-by-step coating device for precursor solution and surfactant and use method of device

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preparation example Construction

[0056] The present invention also discloses a method for preparing a perovskite solar cell. In the process of preparing the perovskite solar cell, the step-by-step coating equipment of precursor and surfactant as described above is used, including the following steps:

[0057] S1. Inject the prepared surfactant solution and the divalent precursor solution into different raw material bottles respectively. The raw material bottle 109 of the first group of coating devices in the front is filled with the divalent precursor solution. The two groups of raw material bottles 209 of the second group of coating devices behind are filled with surfactant solutions.

[0058] S2. Place the substrate 208 on which the conductive layer and the electron / hole transport layer have been prepared on the coating platform 106 . First, a set of injection pumps 104 of the first set of coating devices is turned on, and the perovskite solution is delivered to a set of coating die heads 101 through a set ...

Embodiment 1

[0074] 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.

[0075] 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

[0078] 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: Figure 6 Schematic cross-sectional view of the shown perovskite thin film layer after coating.

[0079] 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 lipophil...

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Abstract

The invention relates to a step-by-step coating device for precursor solution and surfactant. The device comprises a post-processing device, a coating platform and a conveying device, two groups of coating devices are arranged at the front part of the conveying device, and each group of coating devices comprises a coating die head, a die head lifting table, an injection pump and a raw material bottle. The coating die head is communicated with the injection pump through a guide pipe, the injection pump is communicated with the raw material bottle through a pipeline, and a precursor solution anda surfactant solution are respectively used for filling the two raw material bottles. Under the driving of the conveying device, the relative movement is generated between the die head lifting tableand the coating platform, and a to-be-coated substrate placed on the coating platform is respectively coated by the two coating die heads in sequence and then is conveyed to the post-processing deviceby the conveying device for post-processing. The invention further discloses a using method and application of the coating device. According to the present invention, the coverage rate of the coatingfilm 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 step-by-step coating equipment and method for a precursor solution 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 proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/42
CPCH10K71/12H10K30/10Y02E10/549
Inventor 不公告发明人
Owner HANGZHOU MICROQUANTA SEMICON CO LTD