Matched screen board of solar cell electrode and printing method thereof

Abstract

The invention discloses a matched screen board of a solar cell electrode and a printing method thereof. The matched screen board of the solar cell electrode comprises two screen boards which are matched. A first screen board of the two screen boards is of a complete grid line structure and comprises a plurality of thin grid lines and a plurality of main grid lines. A second screen board of the two screen boards is of a thin grid line structure. After accurate counterpoint of the two screen boards is achieved, overlapping of the thin grid lines on the two screen boards is guaranteed. According to the matched screen board of the solar cell electrode and the printing method thereof, a 'camel peak' which can appear with a traditional printing method occurs to the electrode thin grid lines after primary printing is carried out. The 'camel peak' disappears after secondary printing. The electrode grid lines obtained after the two printing are even, smooth, and large in depth-width ratio. And meanwhile, the problem of empty printing is solved, and conversion efficiency of a solar cell is improved.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a matching screen plate of a solar cell electrode with grid line complementary structure and a printing method thereof. Background technique [0002] Today's global economic development is advocating low-carbon, and solar energy is a clean energy source, and its widespread use has become a trend. The development of solar cell technology is getting faster and faster. Although its cost is much higher than that of traditional forms of power generation such as thermal power, in the 21st century when a low-carbon economy is vigorously advocated, research on solar cell technology will play an important role in the field of energy research. . Solar cells are the core of solar energy utilization, and improving their conversion efficiency is a major goal of current research. In addition to the selection of battery substrate materials and the improvement of substrate manuf...

AI Technical Summary

Problems solved by technology

[0004] 1. One-time printing is prone to virtual printing (ie breakpoints), and the aspect ratio of the thin grid lines is small;

[0005] 2. Although multiple printings can avoid virtual printing, the thin grid lines become seriously widened, which affects the illuminated area of ​​the battery, and the result of repeated printing is that the thin grid lines are uneven and appear "camel humps";

[0006] 3. Even if multiple printings can solve the problem of the height of the thin grid lines, but for the busbars, the consequence of multiple printings is that the thickness of the busbars is higher and the conductive paste is wasted, but it does not bring obvious conversion efficiency improve;

[0007] 4. The high-precision stencil is easy to be damaged, and the grid line is easy to break

[0008] Generally speaking, the traditional multiple printing method is not only costly, but also does not bring corresponding benefits, so it is not suitable for large-scale production of enterprises

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