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A solvothermal method for preparing perovskite solar cells

A technology of solar cells and heat treatment methods, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of poor repeat rate of finished products, easy to be volatile and clean, large randomness, etc., achieve good treatment effect, improve repeat rate of finished products, optimize structure effect

Active Publication Date: 2018-08-24
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect of this method is that the solvent is completely exposed to the heating plate and it is easy to volatilize cleanly; in addition, the amount of solvent permeating into the watch glass depends on the size of the gap formed by the watch glass and the heating plate, which has great randomness
These two problems lead to different batches of samples having different solvent vapor concentrations during solvothermal treatment, different time solvent vapor concentrations and solvent vapor persistence times, resulting in poor repeatability of finished products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of solvothermal treatment method for preparing perovskite solar cells of the present invention is realized through the following steps:

[0027] In the first step, dimethyl sulfoxide and polyvinylpyrrolidone are uniformly mixed at a mass ratio of 1 / 2 to form a viscous solution;

[0028] In the second step, the above solution is spin-coated on a glass slide at 1000 rpm to form a gel film;

[0029] The third step is to place the glass slide treated in the second step and the perovskite layer in the perovskite solar cell to be heat-treated on a heating plate protected by a nitrogen atmosphere, and heat-treat it at 100°C for 1 hour. The sulfoxide will be continuously released from the glass slide at a constant concentration, and the formed vapor can cover the perovskite layer for a long time, continuously infiltrate it, and continuously optimize the structure of the perovskite layer;

[0030] In the fourth step, the treated perovskite layer is taken out for subseque...

Embodiment 2

[0033] A kind of solvothermal treatment method for preparing perovskite solar cells of the present invention is realized through the following steps:

[0034] In the first step, ethylene glycol and polyoxyethylene are mixed evenly at a mass ratio of 1 / 1 to form a viscous solution;

[0035] In the second step, the above solution is spin-coated on a glass slide at 2000 rpm to form a gel film;

[0036] In the third step, the glass slide treated in the second step is transported to the poly-3,4-ethylenedioxythiophene-polystyrenesulfonic acid (PEDOT-PSS) hole in the perovskite solar cell that requires heat treatment. The layers are placed together on a heating plate protected by an air atmosphere, and heat-treated at 150°C for 2 hours. During this process, ethylene glycol will continue to be released from the glass slide at a constant concentration, and the formed vapor can cover the holes of PEDOT-PSS for a long time. On the transport layer, it is continuously infiltrated to cont...

Embodiment 3

[0040] A kind of solvothermal treatment method for preparing perovskite solar cells of the present invention is realized through the following steps:

[0041] In the first step, chlorobenzene and polymethyl methacrylate are uniformly mixed in a mass ratio of 3 / 1 to form a viscous solution;

[0042] In the second step, the above solution is spin-coated onto a glass slide at 1000 rpm to form a gel film;

[0043] In the third step, place the glass slide treated in the second step and the PCBM electron transport layer in the perovskite solar cell that needs heat treatment on a heating plate protected by an argon atmosphere, and heat treat it at 60°C for 1.5h. Chlorobenzene will continue to be released from the glass slide at a constant concentration, and the formed vapor can cover the PCBM electron transport layer for a long time, continuously permeate it, and continuously optimize the structure of the PCBM electron transport layer;

[0044] In the fourth step, the processed PCBM...

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PUM

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Abstract

The invention discloses a solvent heat treatment method for preparing a perovskite solar cell. The steps are as follows: firstly, dispersing a solvent in a polymer at a mass ratio of 1 / 2-4 / 1, mixing evenly to form a viscous solution; secondly , Spin-coat the above solution onto a glass slide; again, place the slide and the functional layer of the perovskite solar cell to be heat-treated on a heating plate protected by an air atmosphere, a nitrogen atmosphere or an argon atmosphere, and use a temperature of 50-200°C Heat treatment for 0.5‑2h, during which the solvent will continue to be released from the slide, and its vapor can continue to cover the functional layers of perovskite solar cells to be treated, and can continuously penetrate these functional layers; finally, after taking out the processed The functional layer of the perovskite solar cell is used for subsequent cell preparation, assembly and performance testing. The solvent heat treatment method is simple, can effectively optimize the structure of the functional layer of the perovskite solar cell, and significantly improve the photoelectric performance of the cell.

Description

【Technical field】 [0001] The invention relates to a solvent heat treatment method for optimizing the structure of each functional layer of a perovskite solar cell. 【Background technique】 [0002] Perovskite solar cell is a new type of solar cell, which has the advantages of low cost, simple preparation process, and high photoelectric conversion efficiency, so it has good application prospects and is expected to become a strong competitor of silicon-based solar cells. During the preparation process of perovskite solar cells, each functional layer such as perovskite layer, electron transport layer and hole transport layer is heat-treated in a certain solvent vapor environment, and the structure can be optimized, thereby significantly improving the photoelectric performance and product repetition rate. [0003] The traditional solvothermal treatment method is to cover each functional layer of the perovskite solar cell to be treated with a watch glass, add a solvent to the edge ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18H01L51/42H01L51/48
CPCH01L31/18H10K71/00H10K30/00Y02E10/549Y02P70/50
Inventor 兰章吴季怀
Owner HUAQIAO UNIVERSITY