The emergence of photovoltaic cells not only provides convenience for the recycling of solar energy, but also gradually becomes a part of our lives. The cleaning, texturing and screen printing links in the manufacturing process of photovoltaic cells have improved the quality of the cells in an all-round way, which makes the quality inspection of photovoltaic cells particularly important. Millennial Solar's 3D confocal microscope has won unanimous praise from many cell manufacturers for its comprehensive and accurate measurement of photovoltaic cells and time-saving and labor-saving inspection operations.

Exquisite Technology to Meet Your Surface Measurement Needs

 With high-definition optical microscope technology, Millennial 3D confocal microscope can easily measure steep slopes and various complex-shaped surfaces in photovoltaic cells, and provide height distribution in real time according to the test mode, so as to obtain comprehensive surface data and images. And based on the intuitive icon interface for fast and convenient data ingestion and analysis.

Cleaning and texturing? What exactly is it?

In photovoltaic cells, it is often necessary to make a textured surface on the surface of a silicon wafer. The effective textured structure can make the incident light reflect and refract multiple times, change the direction of the incident light in the silicon wafer, extend the optical path, and generate light trapping. role, thereby increasing the generation of photogenerated carriers and forming a light-trapping textured structure. The light-trapping velvet structure can allow the sun's rays to reflect multiple times on the surface of the silicon wafer to achieve the purpose of reducing the reflectivity.

Reflectance wavelength map of silicon wafer before and after texturing

Textured Surface Measurement of Photovoltaic Pyramid

When Millennial 3D confocal microscope is measuring the textured surface of the pyramid, it can automatically measure the selected coordinate position according to the automatic measurement in the software system to form a pyramid profile analysis module for each scanning area.

Millennial 3D confocal microscope has high-definition confocal microscopy technology. When measuring the textured surface of the pyramid, it can instantly scan the entire area and various uneven shapes, and quickly and accurately draw any outline of a pyramid is expressed in the form of images.

Screen Printing

In order to reduce production costs and improve production efficiency, screen printing technology for producing thick film integrated circuits has been introduced into the production of photovoltaic cell electrodes. Screen printing is to use the basic principle that the mesh part of the screen graphic passes through the paste and is printed on the substrate, while the non-graphic part of the mesh does not pass through the paste and forms a blank on the substrate for printing.

Screen printing process diagram

Photovoltaic Grid Measurement

Millennial 3D confocal microscope can use high-magnification and high-definition technology to scan tiny shapes invisible to the naked eye when using high-definition confocal microscopy technology to measure photovoltaic grids, and accurately capture roughness with high-definition data, even on difficult surfaces. Resolved solvent materials can also be scanned faithfully and accurately capture tiny shapes.

Photovoltaic grid line profile analysis module diagram

The ultra-high measurement analysis of the Millennial 3D confocal microscope makes the number of profile lines in the single field of view up to 48, which greatly reduces the measurement error.

E-mail: market@millennialsolar.cn

Demand determines the market, quality represents the future! Millennial 3D confocal microscope is committed to improving the product quality in the solar cell inspection process by virtue of its multiple functions and high accuracy. Millennial Solar has been continuously launching new products and new technologies. It is precisely because of this quality that it has won unanimous praise from customers in the photovoltaic industry. In the future, Millennial Solar will continue to take quality as the basis, refine products and write a new chapter of development!