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Perovskite material, preparation method thereof, light absorption layer and perovskite cell

A technology of perovskite material and light absorption layer, which is applied in photovoltaic power generation, circuits, electrical components, etc., can solve the problem that the utilization rate of photoelectric conversion efficiency materials needs to be improved, and achieve the effect of high material utilization rate and high photoelectric conversion efficiency.

Pending Publication Date: 2021-02-09
紫石能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method provided by the present invention can produce high-performance perovskite materials in a large area, at low cost and on a large scale, and solve the problems that the current flexible perovskite batteries need to be improved in terms of photoelectric conversion efficiency, large area, process stability and material utilization.

Method used

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  • Perovskite material, preparation method thereof, light absorption layer and perovskite cell
  • Perovskite material, preparation method thereof, light absorption layer and perovskite cell
  • Perovskite material, preparation method thereof, light absorption layer and perovskite cell

Examples

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Effect test

Embodiment 1

[0067] In this embodiment, the flexible perovskite battery is as follows:

[0068] 1. First, use deionized water, ethanol, acetone, isopropanol, and ultrasonic waves to clean the transparent and flexible PET substrate with the transparent conductive electrode ITO in sequence. The substrate size is 10cm×10cm.

[0069] 2. The electron transport layer PCBM was prepared on the ITO electrode by spin-coating method.

[0070] 3. Prepare the light absorbing layer FAPb(I) on the electron transport layer 0.85 Br 0.15 ) 3 .

[0071] 4. Prepare the hole transport layer PEDOT:PSS on the perovskite layer by spin-coating method.

[0072] 5. Finally, a metal gold electrode was prepared as a top electrode by a vacuum evaporation method to obtain the flexible perovskite battery.

[0073] figure 1 Schematic diagram of the structure of the perovskite cell prepared for this example, as shown in the figure, the top electrode 1, the hole transport layer 2, the light absorption layer 3, the ele...

Embodiment 2

[0081] The difference between the flexible perovskite battery provided in this example and the flexible perovskite battery in Example 1 is that the composition of the light absorbing layer is MA 0.5 FA 0.5 Pb(I 0.8 Br 0.2 ) 3 , its thickness is 500nm, and its preparation steps are as follows:

[0082] (1) adopt the mixed solvent of DMF and DMSO to prepare lead iodide precursor solution, the volume ratio of DMF and DMSO is 14:0.8, the concentration of lead iodide precursor solution is 0.8mol / L, the gained lead iodide precursor The solution adopts ultrasonic spraying method to prepare lead iodide film on the substrate. The specific parameters of ultrasonic spraying are: spraying width 20 mm, spraying interval 5 mm, nozzle height 10 mm, spraying speed 200 mm / s, substrate temperature 35 °C, precursor flow rate 0.5 mL / s min, the carrier gas nitrogen pressure is 0.015MPa.

[0083] (2) A mixed solvent of DMF and DMSO is used to prepare a precursor solution containing formamidine...

Embodiment 3

[0087] The difference between the flexible perovskite battery provided in this example and the flexible perovskite battery in Example 1 is that the composition of the light absorbing layer is MAPbI 3 , its thickness is 450nm, and its preparation steps are as follows:

[0088](1) adopt the mixed solvent of DMF and DMSO to prepare lead iodide precursor solution, the volume ratio of DMF and DMSO is 14:0.5, the concentration of lead iodide precursor solution is 0.4mol / L, the gained lead iodide precursor The solution adopts ultrasonic spraying method to prepare lead iodide film on the substrate. The specific parameters of ultrasonic spraying are: spraying width 20 mm, spraying interval 5 mm, nozzle height 10 mm, spraying speed 200 mm / s, substrate temperature 35 °C, precursor flow rate 0.5 mL / s min, the carrier gas nitrogen pressure is 0.015MPa.

[0089] (2) Adopt the mixed solvent of DMF and DMSO to prepare the precursor solution containing methylamine iodide, the volume ratio of ...

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Abstract

The invention provides a perovskite material, a preparation method thereof, a light absorption layer and a perovskite cell. The preparation method comprises the following steps: 1) spraying a B-site precursor on a substrate to obtain a B-site precursor film; 2) spraying a precursor containing an A-site substance and an X-site substance onto the B-site precursor film to obtain a perovskite film; and 3) performing freezing treatment on the perovskite film, and then performing purging and annealing to obtain the perovskite material. The perovskite material film obtained by the method is compact and uniform, the material utilization rate in the preparation process is very high, and meanwhile, large-area preparation can be carried out; high temperature is not needed in the preparation process,and the method is especially suitable for preparing the flexible perovskite cell; and the prepared large-area flexible cell also realizes relatively high photoelectric conversion efficiency and showsa very high industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of energy conversion, and relates to a perovskite material, a preparation method thereof, a light absorbing layer and a perovskite battery. Background technique [0002] With the increasingly serious problems of the global ecological environment and energy shortage, clean and renewable energy has attracted worldwide attention, especially solar photovoltaic technology. Among the existing solar technologies, organic-inorganic hybrid perovskite cells have aroused great interest of researchers at home and abroad in the past ten years due to their high photoelectric conversion efficiency and low preparation cost, and have received a lot of attention. Rapid development. At present, the photoelectric conversion efficiency of this type of battery has reached more than 23%, which has extremely high application value. [0003] The preparation of flexible perovskite batteries includes the solution spin coating method...

Claims

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Application Information

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IPC IPC(8): H01L51/48H01L51/42
CPCH10K71/15H10K71/12H10K30/00Y02E10/549
Inventor 许吉林刘琦
Owner 紫石能源有限公司
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