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Preparation method of solar battery based on nano CdS (Cadmium Sulfide) film

A technology of solar cells and thin films, applied in the manufacture of circuits, electrical components, final products, etc., can solve the problems of loss of light energy, battery efficiency reduction, etc., and achieve the effects of increasing short-circuit current, reducing short-wave loss, and reducing short-wave loss

Inactive Publication Date: 2011-08-31
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The basic structure of CdTe thin-film battery is glass / transparent electrode / CdS / CdTe / back electrode. Since the window layer material CdS has a small forbidden band width of about 2.4eV, light with a wavelength of less than 500 nanometers in the solar spectrum will be blocked. The CdS window layer absorbs (it is estimated that a 0.1 micron thick CdS film can absorb about 63% of the incident light whose energy is greater than its forbidden band width), thus losing part of the incident light energy and reducing the efficiency of the cell

Method used

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  • Preparation method of solar battery based on nano CdS (Cadmium Sulfide) film
  • Preparation method of solar battery based on nano CdS (Cadmium Sulfide) film

Examples

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Embodiment 1

[0019] (1) Preparation of nano-CdS:O thin films

[0020] SnO 2 :F transparent conductive glass is put into the sample stage of magnetron sputtering instrument, and sputtering target material is high-purity CdS ceramic target (purity 99.99%, wt.%); First vacuumize to 15Pa to sputtering chamber with vacuum pump, then The reaction chamber was evacuated to 7×10 with a molecular pump -4 Pa; A mixed gas of argon and oxygen is introduced, and the flow ratio of argon and oxygen is 5:1. The deposition pressure is 1.5Pa, the sputtering power is 80W, and the CdS film sputtering time is 2 minutes.

[0021] (2) Heat treatment of nanometer CdS:O film

[0022] Put the nano-CdS film into the sample stage of the near-space sublimation deposition equipment; first use the vacuum pump to evacuate the near-space sublimation equipment to 15Pa, and then use the molecular pump to evacuate the reaction chamber to 9×10 -4 Pa, the sublimation source is a high-purity cadmium chloride crystal, the tem...

Embodiment 2

[0027] (1) Preparation of nano-CdS:O thin films

[0028] SnO 2 :F transparent conductive glass is put into the sample stage of magnetron sputtering instrument, and sputtering target material is high-purity CdS ceramic target (purity 99.99%, wt.%); First vacuumize to 15Pa to sputtering chamber with vacuum pump, then The reaction chamber was evacuated to 7×10 with a molecular pump -4 Pa; A mixed gas of argon and oxygen is introduced, and the flow ratio of argon and oxygen is 4:1. The deposition pressure is 1.5Pa, the sputtering power is 80W, and the CdS film sputtering time is 2 minutes.

[0029] (2) Heat treatment of nanometer CdS:O film

[0030] Put the nano-CdS:O film into the sample stage of the near-space sublimation deposition equipment; first use the vacuum pump to evacuate the near-space sublimation equipment to 15Pa, and then use the molecular pump to evacuate the reaction chamber to 9×10 -4 Pa, the sublimation source is a high-purity cadmium chloride crystal, the t...

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Abstract

The invention relates to a high-efficiency manufacturing method of a solar battery based on a nano CdS (Cadmium Sulfide) film window layer, belonging to the technical field of the manufacturing of inorganic nonmetal material devices. The preparation method of the solar battery comprises the following steps of: preparing a high-forbidden band width oxygen-doped nano CdS film (CdS:O film) on conductive glass by using a magnetic-control sputtering method, wherein the mixed gas of argon and oxygen in a certain proportion is introduced during sputtering, thereby obtaining the nano CdS:O film; carrying out high-temperature annealing to the prepared film in the mixed gas of the argon and the oxygen and steam of cadmium chloride to improve the performance of the film; and then preparing a CdTe orCdZnTe film and back electrodes on the nano CdS:O film to obtain the solar battery. By adopting the CdS:O film to prepare the solar battery, the efficiency of the solar battery based on the CdS film can be improved.

Description

technical field [0001] The invention relates to a solar cell manufacturing method based on a nano-CdS thin film window layer, and belongs to the technical field of solar cell manufacturing technology. Background technique [0002] Due to the depletion of fossil fuels on the earth and the pollution caused by fossil fuels, human beings will face severe energy and environmental crises in the near future. In view of this, many countries have increased their support for the development of renewable energy technologies. As an inexhaustible, inexhaustible and non-polluting energy source, solar energy occupies an extremely important position in the long-term energy strategy of human beings. Among them, solar photovoltaic power generation is a main form of solar energy utilization. As an important part of new energy, it has attracted more and more attention from people in recent years and has developed rapidly. [0003] At present, solar cell products are mainly crystalline silicon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/20
CPCY02P70/50
Inventor 王林军黄健唐可张继军贡伟明夏义本
Owner SHANGHAI UNIV