Device of electronic printing of solar photovoltaic cell electrode

Abstract

The invention belongs to the technical field of advanced manufacturing and provides a device of electronic printing of a solar photovoltaic cell electrode. The device comprises a fluid jet printing module, a moving module, a microscopic vision module and a control module. According to the fluid jet printing module, conductive ink flows out of a nozzle hole with a certain velocity. Two-dimensional plane motion is realized by the motion platform in the motion module. A host computer controls motion trajectory and motion velocity. The motion platform substrate is connected to a vacuum suction device. The vacuum suction device sucks and fixes a photovoltaic cell semiconductor chip to allow the photovoltaic cell semiconductor chip to move with the motion platform. The microscopic vision module monitors software and a printing process in real time. The device is simple, the structure of the solar photovoltaic cell electrode can be optimized, and the utilization ratio of an electrode material can be improved.

Description

technical field [0001] The invention belongs to the field of advanced manufacturing technology and provides a device for electro-spray printing solar photovoltaic battery electrodes. Background technique [0002] Solar photovoltaic cells (hereinafter referred to as photovoltaic cells) can directly convert solar energy into electrical energy, and its principle is the photovoltaic effect. Silicon solar cells are currently the most mature and dominate battery applications. [0003] Silicon solar cells are mainly composed of upper electrodes, lower electrodes, n-type semiconductors, p-type semiconductors, and p-n junctions. The upper and lower electrodes are directly connected to the load and output voltage to the load, which is the key to affecting the series resistance and photoelectric conversion efficiency of photovoltaic cells. Photovoltaic cells generally use silver as an electrode material, and silver electrodes are also an important part that affects the cost of photovo...

AI Technical Summary

Problems solved by technology

Limited by the structure of the mesh plate and the properties of the slurry, it is difficult to further reduce the width of the electrode structure, so it is difficult to reduce the area of ​​the electrode on the battery plate, resulting in difficulty in reducing the shadow loss

Although the height of the electrode structure can be increased by secondary printing, there are problems such as difficult control of electrode line width accuracy and complex process in secondary printing, which limits the performance of photovoltaic cells such as open circuit voltage, short circuit current, plane utilization rate, and photoelectric conversion efficiency. Further improve

In addition, since screen printing is a contact manufacturing method, it directly applies pressure to the fragile semiconductor wafer, which is likely to cause damage such as cracks and breakage of the wafer.

Moreover, the utilization rate of the electrode paste for screen printing is limited, and the screen needs to be replaced frequently, which increases the manufacturing cost of photovoltaic cells

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