Method for preparing front electrode of crystalline silicon photovoltaic cell

Abstract

The invention relates to the technical field of crystalline silicon photovoltaic cells and in particular to a method for preparing the front electrode of a crystalline silicon photovoltaic cell. The method comprises the following steps of: firstly, forming an electrode by using silk screen printing photosensitive silver paste and drying the electrode; secondly, covering the top of the cell with a mask plate provided with an electrode pattern and irradiating the mask plate with a UV light source to cure a part to be retained, wherein the retained part is any part of the electrode pattern, the un-retained part is uncured, and unexposed and uncured part required to be cleaned is any part of the electrode pattern; thirdly, cleaning the uncured part of an electrode gate line by using a photosensitive silver paste developing solution; and fourthly, sintering the electrode gate line. The method for preparing the front electrode of the crystalline silicon photovoltaic cell can prepare thin electrode gate lines with high height-to-width ratios, reduces light shielding area, increases electrode cross-sectional area so as to reduce power loss and greatly improve the conversion efficiency of the cell.

Description

technical field [0001] The invention relates to a crystalline silicon photovoltaic cell, in particular to a method for preparing a front electrode of a crystalline silicon photovoltaic cell. 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. Sunlight shines on a semiconductor PN junction (PN Jμnct1n) to form a new hole-electron pair (H-E pair), 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. Current is drawn from the front and back electrodes. In order to increase the light-receiving area of ​​the battery, it is required that the width of the electrode grid line be as small as possible, but at the same time, in order to reduce the power loss of the electrode, it is required that the cros...

AI Technical Summary

Problems solved by technology

At present, the industrialized electrode grids are prepared by screen printing. Increasing the height-width ratio of the electrode grids poses a great challenge to the performance of the screen and paste. It is becoming more and more difficult to further increase the aspect ratio of the electrode grids.

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