Spraying system for preparing ultra-efficient solar cell electrode, and application of spraying system

Abstract

The invention relates to a spraying system for preparing a super-efficient solar cell electrode, and application thereof. The system comprises a slurry storage device (1), a spraying device (2) and amask (3), wherein the slurry storage device (1) and the spraying device (2) are connected through a pipeline, and the mask (3) is arranged between the spraying device (2) and a solar cell electrode. The system is characterized in that (1) fully mixing slurry; (2) manufacturing a seed layer; (3) manufacturing a conductive transmission layer; and (4) carrying out a co-firing process, wherein after agrid line (4) is manufactured, an electrode is heated and sintered so as to form the super-efficient solar cell electrode. Compared with the prior art, the manufactured multilayer electrode of the invention is good in electrode compactness and good in grid line electrode stacking leveling property, current transmission is facilitated, the precious metal consumption is reduced, the cost is greatlysaved, and the operation yield is increased.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a spraying system for preparing ultra-high-efficiency solar cell electrodes and its application. Background technique [0002] At present, with the continuous innovation and development of photovoltaic power generation technology, the requirements for photoelectric conversion efficiency are getting higher and higher. On the one hand, on silicon-based batteries, such as the current Perc (passivated emitter back contact) technology, HIT (heterojunction battery) technology, Topcon (tunneling oxide layer passivation battery) technology, N-type technology, etc., In addition to the need to improve the process, on the other hand, it is necessary to adjust the printing process. The main method is to reduce the width of the grid line, that is, the electrode, and increase the height of the grid line, that is, the electrode. The main purpose is to reduce the shading lo...

AI Technical Summary

Problems solved by technology

In the past two years, the development of no-knot, low-knot or less-knot technology has reduced the number of wefts to a certain extent, but the number of warps has always been unavoidable. At the same time, due to the difference in the leveling performance of different slurries, the electrodes cannot reach the maximum level. good form, such as Figure 4 , resulting in the application of the conversion efficiency on the electrode is not optimal

[0004] The current electrodes are all made of a single precious metal, which is costly. After printing and forming, and after forming, the level difference distribution is large, the height is low, and the resistance value is easy to be high, which affects the electron transmission and the conversion efficiency is restricted. For example, Figure 5-6

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