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Front-mounted three-junction cascaded solar cell and preparation method thereof

A technology of solar cells and triple-junction cells, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of complex manufacturing process and increase the cost of battery manufacturing, and achieve low manufacturing difficulty, high open circuit voltage, and simple manufacturing process Effect

Active Publication Date: 2016-04-27
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a front-mounted three-junction cascaded solar cell and its preparation method to solve the problems in the prior art that the production cost of the battery and the complexity of the production process will be increased in order to obtain a high-efficiency triple-junction battery

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  • Front-mounted three-junction cascaded solar cell and preparation method thereof
  • Front-mounted three-junction cascaded solar cell and preparation method thereof
  • Front-mounted three-junction cascaded solar cell and preparation method thereof

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Embodiment Construction

[0020] The front-mounted triple-junction cascaded solar cell provided by the present invention and its preparation method will be described in detail below in conjunction with the accompanying drawings.

[0021] Firstly, the specific implementation manner of the front-mounted triple-junction cascaded solar cell of the present invention is given with reference to the accompanying drawings.

[0022] Reference attached figure 1 , 2 As shown, among them, figure 1 It is a structural schematic diagram of the front-mounted three-junction cascaded solar cell grown in the front-mounted manner provided in this specific embodiment, figure 2 for figure 1 The schematic diagram of the structure of the finished product of the three-junction cascaded solar cell shown in Fig. figure 1 , 2 The structure shown is described in detail.

[0023] In the research on GaAs materials, it is found that by adjusting the components of quaternary materials BGaAsBi and GaNAsBi, the quaternary material...

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Abstract

The invention provides a forward installed triple-junction cascade solar cell. The forward installed triple-junction cascade solar cell comprises a GaNAsBi bottom cell, a first tunnel junction, a BGaAsBi middle cell, a second tunnel junction and an AlGaInP top cell sequentially connected onto a GaAs substrate, wherein the AlGaInP top battery and the GaAs substrate are provided with electrodes respectively. The invention also provides a preparation method of the forward installed triple-junction cascade solar cell. The preparation method comprises the following steps of: (1) growing the GaNAsBi bottom cell, the first tunnel junction, the BGaAsBi middle cell, the second tunnel junction, the AlGaInP top cell and an ohmic contact layer sequentially on the GaAs substrate; and (2) respectively preparing a top electrode and a bottom electrode on the AlGaInP top cell and the GaAs substrate to obtain the target solar cell. According to the forward installed triple-junction cascade solar cell, the lattice constants of all sub-cells are matched with the GaAs substrate, the production cost is reduced, the forward installed growing method is adopted for growth, the preparation technology is simple, and the cell efficiency is improved.

Description

technical field [0001] The present invention relates to the field of solar cells, in particular to a GaAs-based front-mounted triple-junction cascaded solar cell using boride and bismuth-containing quaternary materials BGaAsBi and GaNAsBi, and having an optimized band-gap combination, and a preparation method thereof. The solar cell can make full use of the solar spectrum, and meet the current matching of each sub-cell, with high cell efficiency. Background technique [0002] In the development process of III-V compound semiconductor solar cells, in order to improve the conversion efficiency of the cells, it is necessary to divide the solar spectrum, and use matching sub-cells with different band gaps in series to achieve full utilization of sunlight. Purpose. In triple-junction solar cells, the currently researched relatively mature system is the lattice-matched growth of GaInP / GaAs / Ge (1.9 / 1.42 / 0.7eV) triple-junction solar cells. 32-33% (one sun). Calculations show that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0687H01L31/0693H01L31/18
CPCY02E10/544Y02P70/50
Inventor 孙玉润董建荣李奎龙曾徐路于淑珍赵勇明赵春雨杨辉
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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