Organic solar cell and manufacturing method thereof

Abstract

The invention discloses an organic solar cell and a manufacturing method of the organic solar cell. The organic solar cell comprises a substrate, a first electrode, a first charge transferring layer, an optical activity layer, a second charge transferring layer and a second electrode, wherein the first electrode, the first charge transferring layer, the optical activity layer, the second charge transferring layer and the second electrode are sequentially located on one surface of the substrate, an antireflection layer is arranged on the other surface of the substrate and is provided with a first nanometer concave-convex structure, and the refractive index of the first nanometer concave-convex structure changes in a gradient mode in the incident light direction. The organic solar cell effectively improves photoelectric conversion efficiency, has a self-cleaning effect at the same time, and is simple in manufacturing process and suitable for large-scale industrial popularization and application.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to an organic solar cell and a manufacturing method thereof. Background technique [0002] With the continuous depletion of the main energy sources - fossil fuels (coal, oil, natural gas, etc.) and the increasing environmental pollution, energy issues have become one of the important issues facing society today. This has prompted researchers to turn their attention to clean and renewable energy. Because of its "inexhaustible and inexhaustible" solar energy is a real "green" energy, it has become an energy strategy for sustainable development of governments around the world. Currently used solar cells are mainly made of inorganic materials such as silicon or rare metal alloys. [0003] The organic solar cell is a new type of solar cell developed in the 1990s, which uses organic semiconductors as active materials for photoelectric conversion. Compared with inorganic solar cells...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this technology is that the direct contact between the metal nano film and the photovoltaic layer is easy to affect the electrical properties of the solar cell device resistance, open circuit voltage, and fill factor.

But the disadvantage of this technology is: but its preparation method is limited to silicon solar cells, not suitable for the production of organic solar cells

However, the disadvantages of this technology are: due to the randomness and uncontrollability of the distribution of metal nanoparticles, the instability of the efficiency improvement is caused, and the surface plasmon effect is not obvious in the near ultraviolet and visible light bands.

This technology increases the absorption and utilization of light by components, but the disadvantage of this technology is that there is no light-trapping structure inside the single cell, and the cone-shaped structure of the single cell cannot completely absorb scattered light, and there is a problem of light leakage

[0023] The closest to the technical solution of the present invention is a prior application of the applicant's related applicant, the Chinese invention patent with application number 201310033982.X, which discloses an organic solar cell and its manufacturing method. The solar cell It includes a substrate, and a first electrode, a first transport layer, an active layer, a second transport layer and a second electrode sequentially located on the substrate, wherein the first transport layer is provided with a nano-concave-convex structure, and at least the photoactive layer is Partial penetration into the nano-concave-convex structure, so that the photoactive layer forms a complementary structure with the nano-concave-convex structure at the interface with the first transmission layer; although the light-trapping structure of this patent can be used in a wide range from ultraviolet to infrared In the spectral range, the absorption of light can be effectively increased, thereby improving the conversion efficiency of organic solar cells. However, due to the limitation of the light transmission capacity of the substrate itself, the solar cell cannot fully absorb the incident light at various angles, resulting in Photoelectric conversion efficiency is limited

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