Thin film solar cell scribing device and method

Abstract

The present invention relates to a thin film solar cell scribing device and method. The device comprises a work bench, a first guide rail which is arranged on the work bench and used to move a thin film solar cell, a second guide rail which is arranged on the work bench and positioned above the first guide rail, wherein the extension direction of the second guide rail is orthogonal with the extension direction of the first guide rail and is parallel to the extension directions of multiple pre-scribing lines, a scribing assembly which is slidably arranged on the second guide rail and comprises a scribing head and a pick-up head arranged at an interval, wherein the scribing head scribes the thin film solar cell and the pick-up head can collect image information of the multiple pre-scribing lines, a processing module which is in communication connection with the scribing assembly and obtains the paths of the multiple pre-scribing lines according to the image information of the multiple pre-scribing lines to obtain the paths of the multiple scribing lines corresponding to the thin film solar cell and to control the scribing head to scribe the thin film solar cell. The device can improve the overall conversion efficiency of the thin film solar module.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a scribing device and method for thin-film solar cells. Background technique [0002] In order to control and increase the output voltage value, solar cells are usually made into modules, that is, multiple cells are connected in series. Segmentation between sub-cells on different functional layers is achieved by scribing. [0003] Three scribe lines are required to be introduced in the fabrication process of copper indium gallium selenide (CIGS) thin film solar cells. First of all, after the molybdenum (Mo) back electrode layer is plated on the soda-lime glass substrate, the laser is used to perform the first scribing on the surface of the Mo back electrode layer to evenly divide it into slender small cells, and the first scribing The line is marked as P1; secondly, after continuing to plate the CIGS light absorbing layer and cadmium sulfide (CdS) / zinc oxide (ZnO) buffer la...

AI Technical Summary

Problems solved by technology

In order to prevent the three scribed lines of P1, P2 and P3 from bending and intersecting each other, resulting in waste products and a decrease in the yield rate of thin-film solar cells, the usual solution is to increase the distance between the 3 scribed lines

However, the implementation of this scheme will lead to an increase in the area of ​​the "dead zone", which will affect the overall conversion efficiency of the thin film solar cell module.

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