Solar cell, module and method for manufacturing solar cell electrode

Abstract

The invention provides a solar cell, a module and a method for manufacturing a solar cell electrode. An electrode at the front side of the solar cell is only formed through electroplating in the prior art, thereby enabling the reliability of a packaged assembly to be low. The method for manufacturing the solar cell electrode comprises the steps of: firstly cleaning and texturing a cell substrate, then carrying out a shallow diffusion at the front side of the substrate to form a PN junction; thereafter depositing a passivation-antireflection film, then carrying out a deep diffusion in an electrode region at the front side of the substrate and passivating the rear side of the substrate; chemically depositing a first metal in the electrode region at the front side of the substrate to form a seed layer, then carrying out electrochemical deposition to form a second metal or metal alloy layer on the seed layer, and finally forming a third metal or metal alloy layer on the second metal or metal alloy layer by spray-coating or printing. The method provided by the invention can improve the robustness of the solar cell electrode, thereby improving the reliability of a corresponding solar cell module.

Description

technical field [0001] The invention relates to electrochemical deposition metal technology, in particular to a method for manufacturing solar cells, modules and solar cell electrodes. Background technique [0002] At present, the conductive electrode generation method of most commercial solar cells is to use the screen printing method to brush the silver paste on the cathode surface of the solar cell, that is, the front surface, and brush the aluminum paste on the anode surface, that is, the back surface, and then through high-temperature co-firing. , simultaneously generating a conductive cathode and an anode on the cathode and anode of the solar cell. The advantage of this solar cell conductive electrode generation method is that the process is simple and reliable, and it is easy to be applied in large-scale production. [0003] However, the simple process of screen printing and co-firing to generate conductive electrodes for solar cells limits the improvement of the pho...

AI Technical Summary

Problems solved by technology

[0009] The solar cell electrodes formed by the electroplating process have poor strength. When the solar cell packages with such electrodes are formed into components, the interconnection strips cannot be directly welded on the electrodes formed by the electroplating process, and conductive adhesives are usually used to paste them. The interconnection strips are bonded to the solar cell electrodes formed by the electroplating process, and the technology of using conductive adhesive to connect the interconnection strips and solar cell electrodes has the problem of poor reliability.

Images