Preparation method of composite photovoltaic cell

A composite light and battery technology, applied in the field of optoelectronics, can solve the problems that dyes cannot fully absorb photons, hinder the photoelectric efficiency of photovoltaic cells, and reduce the utilization rate of light, so as to improve photoelectric conversion efficiency, reduce capacitance and electron migration, and reduce wear and tear. Effect

Active Publication Date: 2019-01-11
杨松平
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AI Technical Summary

Problems solved by technology

If the particle size of CuO is too large, the adsorbed dye molecules will be greatly reduced, thereby reducing the utilization rate of light, and the electrolyte is easy to directly contact with the conductive glass matrix, resulting in the recombination of charges to form a dark current; if the particle size is too small, light It will pass through directly, the dye cannot fully absorb photons, and there are too many interfaces between small particles, the grain boundary barrier will greatly hinder the transfer of electrons, which is also not conducive to photoelectric conversion.
Therefore, the weak light scattering properties of nano-CuO films and the influence of dark current hinder the further improvement of the photoelectric efficiency of photovoltaic cells.
At present, the efficiency can only reach about 12%
There is no report on the preparation of hierarchically porous CuO-rGO photoanodes by self-assembled deposition growth on the surface of conductive glass using hydrolyzed copper tetrafluoride

Method used

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  • Preparation method of composite photovoltaic cell
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  • Preparation method of composite photovoltaic cell

Examples

Experimental program
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Effect test

Embodiment 1

[0054] Preparation of CuO-rGO material

[0055] Step 1: Add 15mL of 0.1mol / L Cu(NO 3 ) 2 solution and mix well, then add 15mL 0.1mol / L Na 2 CO 3 The solution was added drop by drop to form a blue-green colloidal precipitate; Step 2: After continuing to stir for 10 minutes, move the product into a hydrothermal kettle and put it in an oven at 180°C for 6 hours;

[0056] Step 3: After naturally cooling to room temperature, take out, wash, filter, and dry, and the final product obtained is CuO-rGO material. Preparation of CuO-rGO composite photovoltaic cells

[0057] Step 1: Preparation of CuO-rGO nanofilm by electrophoretic deposition

[0058] A) Rinse doped SnO with clean water 2 Conductive glass with smooth surface and no groove (FTO glass, 7Ω / m 2 ) to remove the visible particles on the surface; then soaked in distilled water, acetone, and absolute ethanol to ultrasonically clean them for 30 minutes respectively, and put them into a desiccator after natural drying for u...

Embodiment 2-5

[0069] Cu(NO 3 ) 2 The concentration of the solution was replaced by 0.04mol / L, 0.06mol / L, 0.08mol / L, 0.1mol / L, and Na 2 CO 3 The concentrations of the solutions were replaced by 0.04mol / L, 0.06mol / L, 0.08mol / L, and 0.1mol / L respectively, and the remaining methods and data were the same as in Example 1.

Embodiment 6-10

[0071]The electrophoretic deposition method of Example 1 to prepare the CuO-rGO nanofilm step 1) is replaced by the conductive glass 1 with a grid-like groove structure on the upper surface. Simultaneously embodiment 7-10 will the Cu(NO 3 ) 2 The concentration of the solution was replaced by 0.04mol / L, 0.06mol / L, 0.08mol / L, 0.1mol / L, and Na 2 CO 3 The concentrations of the solutions were replaced by 0.04mol / L, 0.06mol / L, 0.08mol / L, and 0.1mol / L respectively, and the remaining methods and data were the same as in Example 1. The conductive glass 1 with a grid-like groove structure on the upper surface has a grid spacing of 2 mm and a depth of 0.5 mm. For specific shapes, see image 3 .

[0072] Preparation of Hierarchical Porous CuO-rGO Thin Film Cu in Implementation 1-10 2 (OH) 2 CO 3 The concentrations of colloidal raw materials are shown in Table 1.

[0073] Table 1 Fabrication of hierarchically porous CuO-rGO films Cu 2 (OH) 2 CO 3 The concentration of colloidal r...

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Abstract

The invention discloses a preparation method of a composite photocell. In the invention, an electrophoretic deposition method is firstly used to prepare ordered CuO-rGO (Copper Oxide-Graphene) nano-film in FTO conductive glass, and then, by controlling the hydrolysis rate of Cu2 (OH) 2CO3 colloid to regulate the self-assembly process of CuO nano-particles in conductive glass, the hierarchical porous structure in CuO thin film can be effectively controlled and applied to solar cells. At the same time, the photovoltaic cell fabricated by conductive glass with grid groove structure on the upper surface can ensure the photovoltaic conversion efficiency of the photovoltaic cell and reduce the wear of the platinum counter electrode. The composite photovoltaic cell of the invention has a hierarchical porous structure, which can increase the path of light, improve the light capture efficiency and enhance the service life of the solar photovoltaic cell.

Description

technical field [0001] The invention belongs to the field of optoelectronics, and more specifically relates to a preparation method of a CuO-rGO composite photovoltaic cell. Background technique [0002] The rapid development of the world economy has increased the consumption of traditional energy sources such as oil and coal. The world is facing a serious energy crisis, and it is imminent to seek new alternative energy sources. As a non-polluting, clean renewable energy, solar energy has attracted increasing attention. Finding a high-efficiency solar photovoltaic cell has also become a hot spot for scientists to study. At present, the application of silicon-based solar photovoltaic cells is the most extensive and its technology is relatively mature. The traditional method of preparing solar photovoltaic cells generally uses nanoparticles with a size of 10-20nm to prepare a porous film with a film thickness of 10-12m on a conductive glass substrate. 10-20nm is much smaller...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042H01G9/048
CPCH01G9/2027H01G9/2059Y02E10/542
Inventor 李波
Owner 杨松平
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