Copper-based thin film solar cell positive electrode and preparation method thereof

A thin-film solar cell and positive electrode technology, which is applied in the field of solar cells, can solve the problems of affecting the contact between the electrode and the light-absorbing layer, reducing the short-circuit current of the battery, and hindering the transport of carriers, so as to reduce the interface defect state and increase the short-circuit current density , the effect of improving efficiency

Active Publication Date: 2020-06-05
NANKAI UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The contact between molybdenum and the light absorbing layer of the solar cell has the following problems: (1) there are interface defects at the interface between the molybdenum electrode and the light absorbing layer, which promotes the recombination of photogenerated carriers at the back interface and reduces the short-circuit current of the battery; (2) the surface of the metal molybdenum exists Impurities such as oxides affect the contact between the electrode and the light-absorbing layer and increase the series resistance; (3) The work function of metal molybdenum does not match the energy band of the semiconductor light-absorbing layer, which hinders carrier transport

Method used

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  • Copper-based thin film solar cell positive electrode and preparation method thereof
  • Copper-based thin film solar cell positive electrode and preparation method thereof

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preparation example Construction

[0050] The first aspect of the present invention provides a method for preparing a positive electrode of a copper-based thin film solar cell, comprising:

[0051] Prepare Mo metal electrodes on the substrate;

[0052] The Mo metal electrode is treated with an ammonium phosphate solution to obtain a positive electrode of a copper-based thin film solar cell.

[0053]Use ammonium phosphate solution to process Mo metal electrode in the present invention, NH 4 + Etching on the surface of the Mo metal electrode reduces the interface defect states. The contact between the positive electrode and the light absorbing layer is more matched. Simultaneous PO 4 3- The work function of metal Mo is adjusted to match the energy band of the light absorbing layer. After treatment, the short-circuit current density of the battery is greatly improved, so the efficiency is improved. The process of treating Mo metal electrodes with ammonium phosphate solution is simple and reduces the manufac...

Embodiment 1

[0097] A method for preparing a positive electrode of a copper-based thin film solar cell, comprising the following steps:

[0098] Prepare Mo metal electrodes with a thickness of 1 μm on soda-lime glass by magnetron sputtering, soak the Mo metal electrodes in 1 mmol / L ammonium phosphate solution for 20 minutes, and then anneal at 80°C for 30 minutes to obtain copper-based thin-film solar cell positive electrodes .

Embodiment 2

[0100] A method for preparing a positive electrode of a copper-based thin film solar cell, comprising the following steps:

[0101] Prepare Mo metal electrodes with a thickness of 1 μm on soda-lime glass by magnetron sputtering, soak the Mo metal electrodes in 10 mmol / L ammonium phosphate solution for 20 minutes, and then anneal at 80°C for 30 minutes to obtain copper-based thin-film solar cell positive electrodes .

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Abstract

The invention provides a copper-based thin film solar cell positive electrode and a preparation method thereof. The preparation method of the copper-based thin film solar cell positive electrode comprises the following steps of preparing a Mo metal electrode on a substrate; and treating the Mo metal electrode by using an ammonium phosphate solution to obtain the copper-based thin film solar cell positive electrode. According to the method, the ammonium phosphate solution is used for treating the Mo metal electrode, and NH4 <+> is used for etching the surface of the Mo metal electrode, so thatthe interface defect mode is reduced, and the contact between the positive electrode and a light absorption layer is more matched. Meanwhile, PO43- adjusts the work function of metal Mo, so that the metal Mo is matched with the energy band of the light absorption layer. Through processing, the short-circuit current density of the cell is greatly improved, so that the efficiency is improved. The process for treating the Mo metal electrode with the ammonium phosphate solution is simple, and the manufacturing cost of the solar cell is reduced.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a positive electrode of a copper-based thin-film solar cell and a preparation method thereof, a copper-based thin-film solar cell and a preparation method thereof. Background technique [0002] The energy crisis and environmental pollution are becoming more and more serious, and the development of clean green energy has become a major issue facing mankind. Solar power generation is an internationally recognized new energy industry with development potential. All countries are making every effort to develop solar photovoltaic technology, and regard the development and utilization of solar photovoltaics as an important strategy for sustainable energy development. Copper-based thin-film solar cells use copper-based compounds as light-absorbing layers. Copper-based thin-film solar cells have stable performance, strong radiation resistance, and high photoelectric conversion efficiency. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/18
CPCH01L31/022425H01L31/18Y02P70/50Y02E10/50
Inventor 张毅吴建宇申展敖建平刘玮
Owner NANKAI UNIV
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