Production equipment for inkjet printing of positive electrode of crystalline silicon solar cell

Abstract

The invention discloses production equipment for inkjet printing of a positive electrode of a crystalline silicon solar cell. The production equipment comprises positive electrode main grids, positive electrode fine grids, a bent type piezoelectric inkjet head for printing the positive electrode main grids, a push and press type piezoelectric inkjet head for printing the positive electrode fine grids and computer equipment, wherein the two inkjet heads are electrically connected with the computer equipment, ink fountains of the bent type piezoelectric inkjet head and the push and press type piezoelectric inkjet head are filled with silver-containing conductive ink, and the computer equipment is used for driving the bent type piezoelectric inkjet head to print transversely and the push and press type piezoelectric inkjet head to print vertically through CAD (computer aided design) / CAM (computer aided manufacturing) imaging signals. The production equipment has the advantages that by the aid of the CAD / CAM imaging signals, the high-resolution inkjet heads and the silver-containing conductive ink, thousands of superposition quantities can be jetted by the silver-containing conductive ink within short time, and accordingly, the height of the positive electrode fine grids is increased greatly, the width of the positive electrode fine grids is decreased, and a height-width ratio of the positive electrode fine grids is increased (the light-shading area is decreased), and further, solar cell conversion efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of crystalline silicon solar cells, and more particularly relates to a production equipment for inkjet printing the positive electrodes of crystalline silicon solar cells. Background technique [0002] A solar cell is a device that effectively absorbs solar radiation energy and converts light energy into electrical energy by using the photovoltaic effect. When sunlight shines on a semiconductor P-N junction (P-N Junction), a new hole-electron pair (V-E pair) is formed. ), under the action of the P-N junction electric field, holes flow from the N region to the P region, electrons flow from the P region to the N region, and a current is formed after the circuit is turned on. Because it is a solid semiconductor device that converts sunlight energy into electrical energy by using the photovoltaic effect of various potential barriers, it is also called a solar cell or a photovoltaic cell, and is an important comp...

AI Technical Summary

Problems solved by technology

[0004] But screen printing technology also has some shortcomings, for example, the energy of sunlight cannot be well utilized, forming a so-called "dead layer".

Images