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Solar cell

A solar cell and sunlight technology, applied in the field of solar cells, can solve the problems of bulky optical devices, high cost of optical systems, technical difficulties, etc., achieve high photoelectric conversion efficiency, improve practical significance, and increase the effect of photoelectric conversion efficiency

Active Publication Date: 2014-08-27
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to obtain higher color separation efficiency, this kind of dichroic mirror usually needs to be coated with more than ten layers, or even dozens of layers, which is technically difficult
The second is to use a combination of lenses and prisms to split light, which makes the optical device bulky
The disadvantage of the existing parallel structure is that the cost of the optical system will be very high

Method used

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  • Solar cell
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Embodiment Construction

[0040] Such as figure 1 with figure 2 A schematic diagram of focusing sunlight at a predetermined focus position on an output plane by using a color separation focusing optical element in the prior art is shown. It can be seen from the figure that different wavelengths (λ1 ,λ 2 ,λ 3 ) are respectively color-separated and focused to respective predetermined focus positions on the output plane, and these predetermined focus positions form monochromatic regions corresponding to different wavelengths on the output plane. In the past research work on solar cells, it is often focused on how to involve the color separation and focusing optical elements to focus the specific wavelength of sunlight on the specific focus position on the output plane, and how to select the semiconductor material cell to focus on the output plane. Efficient energy utilization of wavelengths at multiple specific focusing positions, but did not notice that there is still a certain amount of light intens...

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Abstract

The invention provides a solar cell which comprises optical elements and semiconductor material cells. The optical elements are used for forming a plurality of monochrome areas and a mixed area on an output plane, the monochrome areas enable a plurality of wave lengths of sunlight to be focused respectively, and the mixed area is used for enabling the wave lengths to be converged in a mixed mode. The semiconductor material cells are arranged on the monochrome areas and the mixed area on the output plane respectively. The semiconductor material cells which are arranged on the monochrome areas are used for collecting sunlight focused in the monochrome areas, and the semiconductor material cells distributed on the mixed area are used for collecting sunlight converged in the mixed area. The solar cell can utilize energy of the mixed area, so that photoelectric conversion efficiency of the solar cell is greatly improved, and practical significance of the color-separation focusing optical elements applied to the solar cell is further improved.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a high-efficiency solar cell based on a color separation focusing optical element. Background technique [0002] Solar energy is a non-polluting, inexhaustible renewable energy source. An important way to utilize solar energy is to use solar cells to convert light energy into electrical energy. The main principle of solar cells, taking semiconductors as an example, is to use the photovoltaic effect of semiconductor materials to absorb the energy of sunlight and convert it into electrical energy. The two main factors restricting the widespread utilization of solar energy are low photoelectric conversion efficiency and high cost. Currently, cost reductions are mainly achieved by focusing sunlight to reduce the use of expensive solar cell materials. In actual use, due to the different bandgap structures of different semiconductor materials, light with energy lower than the bandgap canno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/054H01L31/0352
CPCY02E10/52Y02E10/50H01L31/0547
Inventor 孟庆波王进泽杨国桢李冬梅全保刚叶佳声张岩黄庆礼许信
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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