Positive electrode of solar cell

Abstract

The embodiment of the invention discloses a positive electrode of a solar cell. The positive electrode comprises two main gate lines and a plurality of secondary gate lines vertical to the main gate lines, and each main gate line consists of a first gate line section and a second gate line section with the width smaller than that of the first gate line section. In the positive electrode of the solar cell, the width of parts of the gate line sections of the main gate lines is smaller than a normal width, so a shading area is reduced, and the power loss caused by gate line shading is reduced, and contact resistance between the gate lines and a silicon wafer is reduced; therefore, the conversion efficiency of the solar cell is improved. Furthermore, the width of the gate lines is shortened, so that the using amount of a sizing agent is reduced; therefore, the manufacturing cost of the solar cell is lowered.

Description

technical field [0001] The invention relates to the technical field of solar energy utilization, and more specifically, relates to a positive electrode of a solar battery sheet. Background technique [0002] A solar cell, also known as a photovoltaic cell, is a semiconductor device that converts the sun's light energy directly into electrical energy. Because it is a green product, does not cause environmental pollution, and is a renewable resource, solar cells are a new energy source with broad development prospects in today's energy shortage situation. [0003] The manufacturing process of solar cells generally has the following steps: chemical cleaning and surface texture treatment, diffusion junction, peripheral etching, phosphorus silicon glass removal, antireflection film deposition, electrode printing, and sintering. In the process of converting light energy into electrical energy in a solar cell, the photogenerated carriers generated inside need to be collected and e...

AI Technical Summary

Problems solved by technology

[0005] In the process of implementing the invention, the inventors found that the prior art has at least the following problems: the grid lines of the front electrodes of existing solar cells have a relatively large width, which on the one hand makes the shading area larger; The contact resistance between silicon chips is high, both of which will reduce the conversion efficiency of the cell

In addition, precious metals are needed as conductive paste when printing electrodes, and the large area covered by the main grid line 1 and the sub-grid line 2 on the silicon wafer will inevitably increase the use of conductive paste, therefore, resulting in the production cost of solar cells. higher

Images