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Three-junction cascaded solar cell and its preparation method

A solar cell and triple-junction technology, which is applied in the direction of circuits, photovoltaic power generation, electrical components, etc., can solve the problems of manufacturing process complexity and increasing battery manufacturing costs, and achieve the goal of reducing manufacturing difficulty, reducing production costs, and simple manufacturing processes Effect

Active Publication Date: 2016-03-09
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 triple-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 manufacturing process will be increased in order to obtain a high-efficiency triple-junction solar cell

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  • Three-junction cascaded solar cell and its preparation method
  • Three-junction cascaded solar cell and its preparation method
  • Three-junction cascaded solar cell and its preparation method

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Embodiment Construction

[0020] The three-junction cascade solar cell provided by the present invention and the preparation method thereof will be described in detail below with reference to the accompanying drawings.

[0021] First, specific implementations of the three-junction cascade solar cell of the present invention are given in conjunction with the drawings.

[0022] Reference attachment figure 1 , 2 Shown, where, figure 1 It is a schematic diagram of the structure of the three-junction cascade solar cell grown in a front-mounted manner provided by this embodiment, figure 2 for figure 1 The structure diagram of the finished product of the three-junction cascade solar cell is shown. figure 1 , 2 The structure shown is explained in detail.

[0023] In the study of GaAs materials, it is found that by adjusting the composition of the quaternary materials BInGaAs and GaNASBi, the quaternary materials can have ideal bandwidth and suitable lattice constant, which makes the BInGaAs and GaAsBi materials match...

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Abstract

The invention provides a three-junction cascade solar battery, comprising a GaNAsBi bottom battery, a first tunnel junction, a BInGaAs intermediate battery, a second tunnel junction and an AlGaInP top battery which are connected on a GaAs substrate in sequence, wherein the AlGaInP top battery and the GaAs substrate are respectively provided with electrodes. The invention also provides a preparation method of the three-junction cascade solar battery. The preparation method comprises the following steps of: (1) growing the GaNAsBi bottom battery, the first tunnel junction, the BInGaAs intermediate battery, the second tunnel junction, the AlGaInP top battery and an ohmic contact layer on the GaAs substrate in sequence; and (2) respectively preparing an upper electrode and a lower electrode on the AlGaInP top battery and the GaAs substrate and obtaining a targeted solar battery. The invention has the advantages that lattice constants of all subbatteries are matched with the GaAs substrate, so that the production cost is reduced; and a forward growing method is adopted for growth, the preparation process is simple and the battery 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 three-junction cascade solar cell using quaternary materials containing boride and bismuth compounds, BInGaAs 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, meet the current matching of each sub-cell, and has high cell efficiency. Background technique [0002] In the development process of group III-V compound semiconductor solar cells, in order to improve the conversion efficiency of the battery, it is necessary to divide the solar spectrum, and use matching sub-cells with different band gap widths to connect in series to achieve full utilization of sunlight. purpose. Among the triple-junction solar cells, the currently more mature system is the GaInP / GaAs / Ge (1.9 / 1.42 / 0.7eV) triple-junction cell grown in lattice matching. However, the gap combination of...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0687H01L31/0304H01L31/18
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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