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Solar cell in bi-component gradual change structure, and preparation method for solar cell

A technology for solar cells and composition gradient, applied in the field of solar cells, can solve the problems of limiting the diffusion capacity of photogenerated carriers and reducing the conversion efficiency, and achieve the effect of eliminating the transport barrier, improving the lattice stress, and improving the photoelectric conversion efficiency.

Active Publication Date: 2016-03-23
PEKING UNIV
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Problems solved by technology

However, at present, high-efficiency full-spectrum InGaN solar cells are facing difficulties such as epitaxial growth of high-quality InGaN thin films, preparation of p-n junctions of high-In InGaN, and electron-hole transport barriers, which greatly limit the diffusion ability of photogenerated carriers and reduce conversion efficiency

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  • Solar cell in bi-component gradual change structure, and preparation method for solar cell
  • Solar cell in bi-component gradual change structure, and preparation method for solar cell
  • Solar cell in bi-component gradual change structure, and preparation method for solar cell

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Embodiment Construction

[0033] The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.

[0034] In this embodiment, an InGaN two-component graded solar cell is prepared.

[0035] like figure 1As shown, the InGaN two-component graded structure solar cell of this embodiment includes: substrate 1, bottom electrode contact layer 2, bottom composition graded layer 3, absorption enhancement layer 4, top composition graded layer 5, top electrode contact layer 6. The top electrode 7, the bottom electrode 8 and the passivation layer 9; wherein, the bottom electrode contact layer 2 is grown on the substrate 1; on a part of the bottom electrode contact layer 2, the bottom composition gradient layer 3 and the absorption enhancement layer are sequentially formed 4. The top component gradient layer 5, the top electrode contact layer 6 and the top electrode 7; on a part of the bottom electrode contact layer 2 is the bottom electrode 8; the sides ...

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Abstract

The invention discloses a solar cell in a bi-component gradual change structure, and a preparation method for the solar cell. The solar cell comprises a substrate, a bottom electrode contact layer, a bottom component gradual change layer, an absorption enhancement layer, a top component gradual change layer, a top electrode contact layer, a top electrode, a bottom electrode, and a passivation layer. The bottom electrode contact layer grows on the substrate. The bottom component gradual change layer, the absorption enhancement layer, the top component gradual change layer, the top electrode contact layer and the top electrode are sequentially disposed on a part of the bottom electrode contact layer. The bottom electrode is disposed on a part of the bottom electrode contact layer. The passivation layer covers the side surfaces of all layers, and the top component gradual change layer can absorb all solar spectrums to some degree and can effectively improve the photoelectric conversion efficiency. A part of sunlight passing through the top component gradual change layer can be further absorbed by the absorption enhancement layer. The bottom component gradual change layer can eliminate an electronic (hole) conveying barrier, and can adjust and control crystal lattice stress, so as to improve the growing quality of materials.

Description

technical field [0001] The invention relates to solar cell technology, in particular to a two-component graded structure solar cell and a preparation method thereof. Background technique [0002] As a major national strategic demand, the research and development of new energy has always been the focus of research and development by relevant units. Environmental problems such as air pollution directly threaten human health and reduce the quality of life. Solar cells are a kind of clean and renewable energy. Especially in recent years, the cost of photovoltaic industry has been greatly reduced and the efficiency of photoelectric conversion has been improved, making solar cells a cheap and efficient new energy that can replace traditional thermal power generation. It can meet the needs of energy conservation and environmental protection in the new situation. needs. Photoelectric conversion efficiency is a characteristic index of solar cells. From single-junction cells to multi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/065H01L31/18
CPCH01L31/065H01L31/1848Y02E10/544Y02P70/50
Inventor 王新强盛博文荣新王平唐宁郑显通马定宇荀坤沈波
Owner PEKING UNIV
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