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Preparation method of CdTe solar cells under magnetic field

A technology of solar cells and thin-film solar cells, which is applied in the manufacture of circuits, electrical components, and final products, and can solve the problems of understanding, scattered CdTe solar cells, etc.

Inactive Publication Date: 2010-03-17
上海联孚新能源科技集团有限公司
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  • Abstract
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Problems solved by technology

However, people's current understanding of the characteristics and preparation methods of CdTe solar cells is very scattered, and there is no systematic understanding

Method used

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  • Preparation method of CdTe solar cells under magnetic field

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Embodiment

[0030] (1) First pre-treat the transparent glass substrate: use 1713 transparent glass as the deposition substrate, use acetone ultrasonic cleaning to remove the grease on the glass surface, then deionized water ultrasonic cleaning to remove impurities on the glass surface; finally dry the glass Put it into the pretreatment chamber and use plasma to clean the glass substrate.

[0031] (2) Preparation of In 2 o 3 :F transparent conductive film: the transparent glass substrate is automatically transferred to the sample stage of the magnetron sputtering instrument by the robot arm in a vacuum environment, and the sputtering target is high-purity In 2 o 3 , first use a vacuum pump to evacuate the sputtering chamber, then use a molecular pump to evacuate the reaction chamber, feed Ar gas and 5% CHF3, adjust the flow rate; adjust the reaction pressure and sputtering power, and sputter for a certain period of time.

[0032] (3) Growth of CdS thin film: The substrate of the prepare...

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Abstract

The invention discloses a preparation method of CdTe solar cells under a magnetic field, which comprises the following steps: pretreating a transparent glass substrate; preparing an In2O3:F transparent conductive film on the transparent glass substrate; putting the glass substrate in a near space subliming furnace, and growing a Cds buffer layer on the glass substrate; growing a CdTe film on the prepared CdS film by using a near space sublimation method, and applying a magnetic field of 1-15T by using a superconducting magnet coil on the substrate to grow a CdTe absorption layer; spattering ametal back electrode on the CdTe surface to form an ohmic contact; and obtaining the high-efficiency CdTe film solar cell. Since the CdTe solar cell is prepared by using the near space sublimation method under the intense magnetic field, the surface smoothness and the compactness of the CdTe film are obviously improved, and the conversion efficiency of the CdTe film solar cell is enhanced.

Description

technical field [0001] The invention relates to a method for manufacturing a cadmium telluride (CdTe) thin-film solar cell, and belongs to the field of manufacturing technology of nano inorganic compound energy materials. Background technique [0002] Solar energy is a clean, non-polluting, inexhaustible natural energy source. Almost all natural resources on which human beings depend are converted to solar energy. Direct conversion of solar energy into electrical energy is an important technology for large-scale utilization of solar energy. Base. Since Bell Labs developed the first polysilicon solar cell with an efficiency of 6% in 1954, the solar cell market has been increasing at an annual rate of 35%. [0003] CdTe is a compound semiconductor and is generally used as an absorber layer in solar cells. Due to its direct bandgap of 1.45eV, it is most suitable for photoelectric energy conversion, thus making it possible to achieve an optical absorption rate of 90% above its...

Claims

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Application Information

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IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 张根发赖建明苏青峰
Owner 上海联孚新能源科技集团有限公司
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