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Perovskite type solar cell and modification method of PEDOT:PSS layer of solar cell

A solar cell, perovskite-type technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of decreased device efficiency and stability, short device life, accelerated decomposition of perovskite materials, etc., to improve the photocurrent. , the effect of increasing the open circuit voltage and increasing the efficiency of electron injection

Active Publication Date: 2018-04-20
JINAN UNIVERSITY
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  • Description
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AI Technical Summary

Problems solved by technology

This film is easy to absorb water, which will accelerate the decomposition of the perovskite material, resulting in a decrease in device efficiency and stability. Usually, the device life of this technology is very short.

Method used

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  • Perovskite type solar cell and modification method of PEDOT:PSS layer of solar cell
  • Perovskite type solar cell and modification method of PEDOT:PSS layer of solar cell
  • Perovskite type solar cell and modification method of PEDOT:PSS layer of solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1 Preparation of Amino Acid Modified Perovskite Solar Cells

[0052] 1) Preparation of modified PEDOT:PSS hole transport layer

[0053] The specific steps are: dissolve 50mg of alanine into 1ml of water. After the dissolution is complete, take 5 μl of the alanine aqueous solution and add it to 1 ml of PEDOT:PSS aqueous solution, and filter. The mass volume ratio of the long-chain amino acid to the PEDOT:PSS solution is 0.25mg:1ml.

[0054] Then the prepared solution was dropped on the FTO, and the film was flung for 30s under the condition of rotating speed of 5000rpm. Immediately after the end, place the film on a hot plate preheated to 140°C for 10 minutes for annealing. The thickness of the PEDOT:PSS thin film is 50 nm.

[0055] 2) Preparation of perovskite layer:

[0056] Precursor PbI 2 , FAI (85%) and CsI (15%) are dissolved in γ-butyrolactone according to the concentration of 1.2mol / ml: DMSO=7:3 (dimethyl sulfoxide), and the solution is coated on th...

Embodiment 2

[0066] Example 2 Preparation of thiol-modified perovskite solar cells

[0067] According to the steps of Example 1, only the aqueous solution of alanine used in step 1) is replaced with mercaptopropionic acid. The volume ratio of the modified material to the PEDOT:PSS aqueous solution is 5 μl:1ml. Add 5μl mercaptopropionic acid to 1ml PEDOT:PSS aqueous solution.

[0068] In AM1.5, 100mW / cm 2 Test the J-V performance curve of the battery with KEITHLEY 4200 under light, such as figure 2 As shown in , the short-circuit current density of the battery is 19.71mA / cm 2 , the open circuit voltage is 0.908V, the fill factor is 0.78, and the photoelectric conversion efficiency is 14%.

Embodiment 3

[0069] Example 3 Preparation of Weak Alkali Metal Oxide Modified Perovskite Solar Cells

[0070] According to the steps of Example 1, only the amino acid used in step 1) is replaced by Mg(OH) 2 , the mass volume ratio of the modified material to the PEDOT:PSS aqueous solution is 1mg:1ml.

[0071] Take 1mg Mg(OH) 2 The solid was added to 1 ml of PEDOT:PSS aqueous solution.

[0072] In AM1.5, 100mW / cm 2 Test the J-V performance curve of the battery with KEITHLEY 4200 under light, such as figure 2 As shown in , the short-circuit current density of the battery is 19.76mA / cm 2 , the open circuit voltage is 0.929V, the fill factor is 0.77, and the photoelectric conversion efficiency is 14.27%.

[0073] The J-V parameter of the all-solid-state sensitized solar cell of table 1 embodiment 1 to embodiment 3 and its modified device

[0074]

[0075] It can be seen from the above that after the modification agent treatment, the fill factor and short-circuit current of the...

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Abstract

The invention discloses a perovskite type solar cell and a modification method of a PEDOT:PSS layer of the solar cell. The perovskite type solar cell comprises an FTO / ITO layer, the PEDOT:PSS layer, alight absorption layer, an electron transmission layer, a BCP layer and an electrode layer; and a cavity transmission layer of the perovskite type solar cell is modified. A material of a modificationlayer includes at least one selected from amino acid, mercaptan and a weakly alkaline metal oxide. Such modification material can improve the electron injection efficiency, improve the stability of perovskite, and inhibit perovskite yellowing of FAI effectively, the material cost is low, an operation method is simple, control is easy, and a new ideal is provided for research on an interface behavior of the perovskite solar cell.

Description

technical field [0001] The invention belongs to the field of perovskite solar cells, and relates to a perovskite solar cell and a method for modifying a PEDOT:PSS layer thereof. Background technique [0002] After the 21st century, with the rapid development of economy and society, human beings have an increasing demand for energy, and energy issues have become an important issue related to human survival. However, the traditional fossil fuels (coal, oil, natural gas) are being depleted day by day due to continuous mass consumption. The development of renewable new energy helps to alleviate the pressure on the world's energy and environment. Solar energy is inexhaustible in new energy sources. Large-scale utilization of clean and renewable solar energy is very important for comprehensively solving energy and environmental problems. meaning. In recent years, in terms of effective utilization of solar energy, photovoltaic utilization has developed the fastest and has the gre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K85/1135H10K30/20Y02E10/549
Inventor 范建东李红亮李闻哲麦耀华马云平张翠苓刘冲
Owner JINAN UNIVERSITY
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