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Spray coating solution, perovskite layer, preparation method of perovskite layer and perovskite cell

A technology of perovskite and spraying liquid, which is applied in coatings, devices and circuits for coating liquid on the surface, etc., can solve problems such as poor quality of perovskite layers, and achieve the advantages of less film holes, lower production costs, and improved performance. Effect

Active Publication Date: 2018-05-22
KUNSHAN GCL OPTOELECTRONIC MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on this, it is necessary to address the problem of poor quality of the perovskite layer obtained by the spraying process in the prior art, and to provide a spraying solution that can improve the quality of the perovskite layer

Method used

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  • Spray coating solution, perovskite layer, preparation method of perovskite layer and perovskite cell
  • Spray coating solution, perovskite layer, preparation method of perovskite layer and perovskite cell
  • Spray coating solution, perovskite layer, preparation method of perovskite layer and perovskite cell

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preparation example Construction

[0040] The invention also provides a preparation method of the perovskite layer.

[0041] A method for preparing a perovskite layer, comprising the steps of:

[0042] The spray liquid provided by the invention is ultrasonically sprayed on the substrate, and then annealed to obtain a perovskite layer.

[0043] Among them, ultrasonic spraying is to atomize the spraying liquid flowing through the ultrasonic transducer through the ultrasonic transducer to produce fine droplets of micron to nanometer scale; and then compress the gas to further make the droplets smaller and homogenized, and at the same time Guide the running direction of the mist particles and increase the running power of the atomized particles.

[0044] Preferably, during ultrasonic spraying, the ultrasonic frequency is 90KHz, the spraying flow rate is 0.5mL / min-1mL / min, the carrier gas is nitrogen, the air pressure is 0.02MPa-0.1MPa, and the atomization current is 0.07A. This could further improve the quality o...

Embodiment 1

[0081] 1. Clean the transparent conductive substrate

[0082] The FTO conductive glass was ultrasonically cleaned in ethanol and deionized water for 15 min respectively, and then dried with nitrogen.

[0083] 2. Preparation of n-type conductive layer

[0084] Prepare 25mg / mL of SnCl 2 "5H 2 O in ethanol solution, and 5 mg / mL lithium bistrifluoromethanesulfonimide (Li-TFSI) in ethanol solution was added, and ultrasonically dissolved.

[0085] After the ultrasonic solution was filtered with a 0.45 μm filter head, it was coated on the FTO conductive glass by spin coating at a speed of 3000 rpm / s. After spinning for 20 s, it was placed on a heating plate at 200 ° C for 1 h.

[0086] 3. Preparation of perovskite layer

[0087] In a beaker, add 0.794g of methylamine iodine (MAI), 2.454g of PbI 2 , and then add 80mL of acetonitrile (CAN), 20mL of 33wt% methylamine in ethanol, ultrasonically dissolve, and prepare a 0.05M perovskite precursor solution. The color of the solution is...

Embodiment 2

[0096]Basically the same as Example 1, the difference is the preparation of the perovskite layer. details as follows:

[0097] In a beaker, add 0.794g of methylamine iodine (MAI), 2.454g of PbI 2 , and then add 80mL of acetonitrile (CAN), 20mL of 33wt% methylamine in ethanol, ultrasonically dissolve, and prepare a 0.05M perovskite precursor solution. The color of the solution is light yellow; the spray solution is obtained.

[0098] Raise the temperature of the heating substrate to 45°C, place the substrate obtained in step 2 on the heating substrate for heating, and ultrasonically spray the spraying liquid on the substrate at 45°C, the carrier gas is nitrogen, the air pressure is 0.02MPa, and the atomization current is 0.07A , the ultrasonic frequency of the ultrasonic spraying equipment is 90KHz, the spraying flow rate is 0.5mL / min, the spraying time is 3min, and the color of the matrix completely changes from yellow to black after 1min of spraying. The substrate was heate...

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Abstract

The invention relates to the photovoltaic field, in particular to a spray coating solution used for preparing a perovskite layer. The spray coating solution comprises a mixed solvent and a perovskitematerial. The mixed solvent is formed by mixing acetonitrile and an amine solution. The solute of the amine solution is at least one of methylamine, propylamine and butyl amine. The solvent of the amine solution is at least one of methyl alcohol, ethyl alcohol and tetrahydrofuran. According to the spray coating solution, the acetonitrile and the amine solution are used as the mixed solvent to dissolve the perovskite material, after spray coating and annealing, the obtained perovskite layer is good in film-forming property and continuity, the film is provided with few holes and is smooth, uniform and good in quality, and therefore the property improvement of a perovskite cell is facilitated. In addition, by the adoption of the spray coating solution, the annealing temperature is low, the utilization rate of the materials is high, and therefore the production cost of the perovskite layer is lowered. The invention further discloses a preparation method of the perovskite layer, the perovskite layer and the perovskite cell.

Description

technical field [0001] The invention relates to the field of photovoltaic technology, in particular to a spray coating liquid, a perovskite layer and a preparation method thereof, and a perovskite battery. Background technique [0002] As a new type of solar cell, perovskite cells have increased their efficiency from 3.8% to 22.1% in recent years, and their efficiency has reached the standard for commercial applications. In addition, perovskite batteries have received more and more attention and research due to their wide source of raw materials, simple preparation process, low cost, and the ability to prepare large-area flexible batteries and transparent batteries. [0003] At present, the perovskite layer of the perovskite battery generally adopts the spin-coating process, but the size of the perovskite layer obtained by the spin-coating process is small, and the amount of solution consumed is large, which is not conducive to the preparation of large-area perovskite batter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/02B05D3/02B05D7/24H01L51/00H01L51/42H10K99/00
CPCB05D1/02B05D3/0254B05D7/24B05D2401/31H10K71/12H10K30/20Y02E10/549Y02P70/50
Inventor 孙建侠方主亮范春琳王保增田清勇范斌
Owner KUNSHAN GCL OPTOELECTRONIC MATERIAL CO LTD
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