Solar cell with Anti-reflection structure and method for fabricating the same
a solar cell and anti-reflection technology, applied in the field of solar cells, can solve the problems of high manufacturing cost, long service life, low noise of solar cells, etc., and achieve the effect of high material cost and high fabrication cos
Inactive Publication Date: 2014-10-23
NATIONAL YUNLIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Benefits of technology
The present invention is aimed at solving the problems of high material and fabrication costs associated with conventional solar cell technology. The technical effects of this invention include: using microspheres and a dielectric layer to create an anti-reflection structure with a rugged surface and a meshed electric-conduction layer to reduce the cost of transparent electric-conduction material. Additionally, a screen-printing method is used to decrease the cost of fabricating solar cells, reducing the dependence on CVD technology. Overall, the invention improves the efficiency of incident light utilization and photoelectric conversion while reducing the cost of solar cell fabrication.
Problems solved by technology
Power shortage drives many nations to develop various substitute energies, especially solar energy.
Besides, solar cells are noiseless and have a long service life.
The electric-conduction layer on the light-incident surface of a solar cell must be made of a material featuring transparency and electric conductibility, such as ITO (Indium Tin Oxide), which is relatively expensive.
Further, the fabrication process of solar cells requires precision CVD (Chemical Vapor Deposition) equipment, which makes the fabrication cost hard to reduce.
Method used
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[0018]The technical contents of the present invention will be described in detail in cooperation with drawings below.
[0019]Refer to FIGS. 1A-1D. The present invention proposes a solar cell with an anti-reflection structure, which comprises a solar cell substrate 10, a meshed electric-conduction layer 20 formed on one surface of the solar cell substrate 10, a plurality of microspheres 30 disposed on the meshed electric-conduction layer 20, and a dielectric layer 40. The microspheres 30 have a diameter of 0.1-50 μm. The dielectric layer 40 is formed between the meshed electric-conduction layer 20 and the microspheres 30 and has a thickness smaller than the diameter of the microspheres 30 to allow the microspheres 30 protrude from the surface of the dielectric layer 40. The solar cell substrate 10 includes a bottom electrode 11 far away from the meshed electric-conduction layer 20, a P-type semiconductor layer 12, and an N-type semiconductor layer 13 neighboring the meshed electric-con...
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Abstract
A solar cell with an anti-reflection structure comprises a solar cell substrate, a meshed electric-conduction layer formed on one surface of the solar cell substrate, a plurality of microspheres disposed on the meshed electric-conduction layer, and a dielectric layer. The microspheres have a diameter of 0.1-50 μm. The dielectric layer is formed between the meshed electric-conduction layer and the microspheres, and has a thickness smaller than the diameter of the microspheres to make the microspheres protrude from the dielectric layer. The meshed electric-conduction layer is formed via a screen-printing method. The present invention uses the microspheres and the meshed electric-conduction layer to achieve an excellent anti-reflection effect. Further, the present invention has the advantages of a simple fabrication process and a low fabrication cost.
Description
FIELD OF THE INVENTION[0001]The present invention relates to a solar cell, particularly to a solar cell with an anti-reflection structure and a method for fabricating the same.BACKGROUND OF THE INVENTION[0002]Power shortage drives many nations to develop various substitute energies, especially solar energy. Solar energy is easy to access and pollution-free. Besides, solar cells are noiseless and have a long service life. Therefore, much money has been invested in research of solar energy. Recently, many technologies have been developed to improve the utilization efficiency of incident light and enhance the photoelectric conversion efficiency, such as changing the interface material, roughening the surface or arranging an anti-reflection layer.[0003]In addition to promoting the photoelectric conversion efficiency, reducing the fabrication cost to increase the economic profit is also a focus subject of solar cell development. The cost of solar cells can be reduced via decreasing the m...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01L31/052H01L31/18
CPCH01L31/18H01L31/0527H01L31/02168G02B1/11G02B5/0226G02B5/0294H01L31/022425H01L31/02366Y02E10/50
Inventor LIN, JIAN-YANGYANG, WEI-JERCHEN, CHIEN-WEN
Owner NATIONAL YUNLIN UNIVERSITY OF SCIENCE AND TECHNOLOGY