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Ant-apex contact heterojunction solar battery and preparation method thereof

A solar cell and heterojunction technology, applied in circuits, photovoltaic power generation, electrical components, etc., to achieve the effects of easy implementation, high photoelectric conversion efficiency, and avoiding contamination

Inactive Publication Date: 2009-06-03
JIANGSU AIDE SOLAR ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there is no technology that can combine the advantages of the above two solar cells

Method used

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  • Ant-apex contact heterojunction solar battery and preparation method thereof

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Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0015] Such as figure 1 Shown is a schematic diagram of the structure of two adjacent units in the back point contact heterojunction solar cell of the present invention, and a solar cell is composed of many such units. Each unit is arranged on a silicon substrate 1, and then a complete solar panel is obtained by connecting multiple units.

[0016] The silicon substrate 1 of the present invention is a P-type or N-type single crystal silicon wafer with a thickness of 200-500 μm and a resistivity of 0.3-500 Ωcm, and the silicon substrate 1 is used as a base area of ​​a solar cell. Prepare a passivation layer 2 made of one of heavily doped amorphous silicon or microcrystalline silicon or silicon dioxide with a thickness of 50-80 nm on the back surface of the silicon substrate 1 to reduce the flow of carriers on the silicon substrate 1 Composite of back ...

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Abstract

The invention relates to an ant-apex contact heterojunction solar battery and a preparation method thereof. The ant-apex contact heterojunction solar battery is characterized in that a plurality of units are included; each unit adopts a P-type or N-type single crystal silicon as a silicon substrate which is used as a base region of the battery; a passivation layer and an aluminium layer are sequentially prepared on the back surface of the silicon substrate from inside to outside, and a point contact base electrode is formed on the surface of the aluminium layer; an amorphous layer used as an emitter region of the battery is deposited on the right surface of the silicon substrate; a transparent conductive film and an emitter region electrode arranged on the transparent conductive film are arranged on the surface of the amorphous layer; and when in use, the base electrode and the emitter region electrode of each unit are respectively connected with an anode and a cathode of electrical equipment through leads. In the ant-apex contact heterojunction solar battery and the preparation method thereof, because the point contact base electrode which is realized through the laser heating technique is adopted on the back surface of the silicon substrate, the effect for passivating and reducing ohmic contact of the electrode can be achieved, the complex process of high sintering in a conventional battery is avoided, the demand to the environment cleanliness is low, the demand to the substrate is thus not high, and a conventional single crystal wafer sold in the market can be adopted.

Description

technical field [0001] The invention relates to a solar cell and a manufacturing method thereof, in particular to a back point contact heterojunction solar cell and a manufacturing method thereof. Background technique [0002] The back point contact solar cell designs the metal electrode and the emission area of ​​the cell on the back surface of the cell, effectively avoiding the influence of the Auger recombination of the emission area on the cell efficiency. At the same time, the dielectric layer or metal layer on the back surface of the battery will reflect the light reaching the back back into the battery body, effectively enhancing light absorption. The electrodes of the battery are all arranged on the back surface, which greatly simplifies the interconnection between the batteries and the preparation process of the assembly. However, compared with conventional solar cells, backpoint contact solar cells have the outstanding disadvantages of high requirements on materia...

Claims

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Application Information

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IPC IPC(8): H01L31/042H01L31/052H01L31/0224H01L31/18
CPCY02E10/50
Inventor 陈国江钟运辉许颖张燕鹏邓峻峰
Owner JIANGSU AIDE SOLAR ENERGY TECH CO LTD
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