Texturing technology for transparent conducting film as top electrode of thin film solar cell

Abstract

The invention discloses a texturing technology for a transparent conducting film as a top electrode of a thin film solar cell. The technology successively comprises the following operational steps: immersing, cleaning and drying. According to the immersing, the cleaning and the drying steps, an automatic control method is employed to carry out automatic and continuous immersing, etching and texturing. A solution for etching of a transparent conducting film is composed of oxalic acid, hydrochloric acid, a surface active stabilizer and deionized water as well as particularly comprises, by weight: 0.1% to 1.5% of the oxalic acid; 0.3% to 2.5% of the hydrochloric acid; 0.01% to 0.5% of the surface active stabilizer; and the balance being the deionized water. According to the invention, an etching solution that is prepared autonomously and an integrated matching of various technologies including an automatic up-and-down feeding technology, an automatic temperature adjusting technology, an automatic immersing technology, an automatic cleaning technology, an automatic drying technology and an automatic monitoring and control technology and the like are utilized, so that industrially automatic and continuous immersing and etching production of the transparent conducting film that is needed by the thin film solar cell is realized.

Description

technical field [0001] The invention relates to the technical field of solar energy utilization, in particular to a texturing process of a transparent conductive film for a front electrode of a thin film solar cell. Background technique [0002] Thin-film solar cells are thin-film photoelectric devices that convert the sun's light energy into direct current (DC) electricity. Transparent conductive films are necessary in the structure of thin-film solar cells. Transparent conductive films are used as front electrodes in thin-film solar cells, that is, solar cells The generated electricity is collected and extracted, and it must be maximized to allow sunlight to pass through. This requires that the transparent conductive film used as the front electrode of the thin film solar cell has a high transmittance to sunlight, and at the same time must have a low sheet resistance to reduce the loss of ohmic contact. In order to maximize the photoelectric conversion efficiency of thin-...

AI Technical Summary

Problems solved by technology

The velvet degree of soaking etching surface is easy to control, the uniformity of surface roughness is good, and the velvet making process is easy to control independently. It is mostly used in manual single-piece production, with low production capacity and large-scale industrial production. Large-scale production, large output, but it is not easy to control the texture of the spray-etched surface, the uniformity of the surface roughness fluctuates greatly, and the texturing process is difficult to control

Whether it is immersion etching or spray etching, the proficiency of the production process technology and corresponding operations is high, and the consistency and stability of industrial mass-produced products are difficult to achieve the transparent conductive film required by thin-film solar cells. requirements