Electrode preparation method of photovoltaic cell

Abstract

The invention discloses a method for preparing an electrode of a photovoltaic cell, which comprises the following steps of: performing ink-jet printing by using conductive ink which contains an organic X precursor and does not contain silver, and printing an ink layer for forming an electrode pattern on a silicon wafer; the ink layer is sintered at low temperature to form a metal X conductive layer; the metal X conductive layer is sintered at high temperature to form a metal silicification X layer, metallization connection is formed, and preparation of the photovoltaic cell electrode is completed. X is selected from one of nickel, cobalt, titanium and molybdenum. According to the preparation method of the electrode of the photovoltaic cell, a silver-containing material and a silk-screen printing technology are not adopted, and the conductive ink containing nickel, cobalt, titanium or molybdenum and an ink-jet printing technology are adopted, so that the preparation efficiency of the electrode can be improved, the silver consumption in the preparation process of the photovoltaic cell is reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to the photovoltaic field, in particular to a method for preparing an electrode of a photovoltaic cell. Background technique [0002] The electrodes of existing photovoltaic cells are generally formed by screen printing silver paste and sintering. [0003] In order to reduce the amount of silver used in the preparation of photovoltaic cells, it is necessary to avoid the use of silver paste as much as possible. [0004] In addition, screen printing needs to use a screen, but the printing pattern of the screen is fixed, so different screens need to be used for printing different electrode patterns, which requires a lot of screens, which increases the cost. Moreover, the screen plate is easily damaged after repeated use, which will affect the printing accuracy of the grid electrode and further affect the quality of the finally prepared photovoltaic cell. [0005] Therefore, it is necessary to develop a method for preparing electrod...

AI Technical Summary

Problems solved by technology

[0004] In addition, screen printing needs to use a screen, but the printing pattern of the screen is fixed, so different screens need to be used for printing different electrode patterns, which requires a lot of matching screens, which increases the cost

Moreover, the screen plate is easily damaged after repeated use, which will affect the printing accuracy of the grid electrode, and then affect the quality of the final photovoltaic cell.