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A kind of carbon opposite electrode perovskite solar cell and preparation method thereof

A solar cell and perovskite technology, applied in circuits, electrical components, photovoltaic power generation, etc., can solve problems affecting long-term stability, mechanical damage to porous membranes, photoelectric conversion efficiency attenuation, etc., to reduce adverse effects and reduce filling The effect of reducing the amount of filling

Active Publication Date: 2021-08-20
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, the high temperature of perovskite solar cells leads to a certain attenuation of its photoelectric conversion efficiency and affects its long-term stability. Reducing the operating temperature of perovskite solar cells is also an urgent problem to be solved.
[0007] Patent CN107146847A discloses a carbon counter-electrode perovskite solar cell, which combines a porous carbon layer and a low-temperature carbon layer to solve the contradiction between the thickness of the carbon electrode layer and the surface resistance. However, the perovskite Mineral solar cells need to print a low-temperature carbon layer on the crystallized perovskite cell. On the one hand, the solvent or other additives in the low-temperature carbon paste are likely to have an adverse effect on the perovskite crystal. On the other hand, the printing process is easy to Mechanical damage to porous membranes
In addition, when the perovskite solar cell is exposed to light outdoors, it will heat up and rise to an excessively high temperature, resulting in a certain attenuation of its photoelectric conversion efficiency and affecting its working life.

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  • A kind of carbon opposite electrode perovskite solar cell and preparation method thereof
  • A kind of carbon opposite electrode perovskite solar cell and preparation method thereof

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preparation example Construction

[0042] The invention provides a method for preparing a carbon counter electrode perovskite solar cell, comprising the steps of:

[0043] (1) sequentially prepare a dense layer, a photoanode mesoporous layer and an insulating layer on a transparent conductive substrate;

[0044] (2) preparing a first carbon layer on the insulating layer described in step (1);

[0045] (3) transferring the perovskite precursor solution to the surface of the first carbon layer described in step (2); the first carbon layer is a porous carbon layer;

[0046] (4) preparing a second carbon layer on the surface of the first carbon layer, the second carbon layer is a patterned graphite sheet to obtain a carbon counter electrode perovskite solar cell.

[0047] In some embodiments, the step (2) specifically includes: printing the carbon paste on the insulating layer by a screen printing machine, and then sintering at 380-450° C. to obtain the first carbon layer; here the carbon paste is also It is call...

Embodiment 1

[0079] (1) Use a cutting machine to cut the conductive glass into glass sheets of a certain size. For example, the preferred size in this embodiment is 100mm × 100mm, but it can also be other sizes. Use a laser to place a certain distance from one edge of the conductive layer of the glass sheet Etch an insulating strip parallel to the edge (preferably in this embodiment, for example, 5 mm from the edge), and etch a plurality of parallel insulating strips in the remaining area to divide the glass sheet into multiple regions, such as this embodiment It is preferred to etch 4 parallel insulating strips to divide the glass sheet into five positive and negative electrode regions, so that the conductive layer cannot be completely conducted, and the etched glass sheet is ultrasonically cleaned with detergent, distilled water, and absolute ethanol cleaning. For the size of the positive electrode region or the negative electrode region, especially its width, it can be specifically sele...

Embodiment 2

[0088] In this embodiment, steps (1), (2), (3), (4), (5) and (6) are the same as in embodiment 1.

[0089] (7) Cut the shape of the 25 μm thick thermally conductive graphite sheet film to the same size as the first carbon layer, and use laser technology to pattern the graphite sheet into a comb shape, such as figure 2 As shown in , after the perovskite precursor solution on the surface of the first carbon layer diffuses to a uniform distribution, the heat-conducting graphite sheet is placed on the surface solution of the first carbon layer, and then it is left standing still to make it fill to each layer through the infiltration process. In the porous thin film layer, each porous thin film layer includes the first carbon layer, the ZrO 2 insulating layer, the TiO 2 The mesoporous layer and the dense layer; after the perovskite is fully infiltrated, the solar cell is annealed at 50 degrees Celsius to complete the preparation.

[0090] The present invention combines the advan...

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Abstract

The invention belongs to the field of perovskite solar cells, and more specifically relates to a carbon counter electrode perovskite solar cell and a preparation method thereof. By combining the advantages of the porous carbon layer and the thermally conductive graphite sheet, the patterned thermally conductive graphite sheet is attached to the surface of the solution after the perovskite precursor solution is filled and diffused uniformly. After annealing, the perovskite crystal and the graphite sheet pass through the intermolecular force combine together. Through the added heat-conducting graphite sheet, on the one hand, the excellent electrical properties of the graphite sheet are used to reduce the square resistance of the entire carbon counter electrode; The connection not only makes the temperature distribution of the solar cell more uniform, but also effectively reduces the temperature of the perovskite solar cell during operation, reducing the adverse effects of high temperature on the perovskite solar cell.

Description

technical field [0001] The invention belongs to the field of perovskite solar cells, and more specifically relates to a carbon counter electrode perovskite solar cell and a preparation method thereof. Background technique [0002] In recent years, research on perovskite solar cells has become popular all over the world. At present, the highest cell efficiency certified by authoritative organizations has exceeded 22%, which exceeds the efficiency of traditional thin-film solar cells. Compared with other types of solar cells, this type of cell has the advantages of convenient material sources, simple manufacturing process, low equipment requirements, and low cell cost. These advantages illustrate the potential of perovskite solar cells to replace high-cost polysilicon and monocrystalline silicon solar cells. [0003] However, perovskite solar cells using noble metals (gold or platinum) as the counter electrode, because of the high cost of noble metal materials, and the need f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/48H01L51/42
CPCH10K71/13H10K30/151Y02E10/549
Inventor 韩宏伟徐觅荣耀光
Owner HUAZHONG UNIV OF SCI & TECH
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