In the context of growing new energy utilization, China's photovoltaic industry has experienced rapid development. Among the key components in this sector, solar cells have become widely used. To secure these cells and ensure insulation, moisture resistance, and protection from air exposure—thereby extending their service life—the solar backsheet plays a crucial role. The spectrophotometer from Hangzhou Caipu Technology is now employed in the quality inspection of these solar backsheets.
During the lamination process of solar photovoltaic modules, two layers of film are used to bond the solar cells with glass and the backsheet. One of these layers typically needs to be removed using short-wave UV light. While the backsheet itself has some resistance to ultraviolet light (300–380 nm), certain backsheet materials may still experience yellowing when exposed to UV radiation. This can lead to degradation of the material’s molecular structure, reducing its reflectivity and overall performance, which in turn affects the power output of the module. Therefore, accurately measuring the yellowing value of the solar backsheet is essential for maintaining product quality.
Jiangsu Photovoltaic Technology Co., Ltd., a high-tech enterprise specializing in polyvinylidene fluoride (PVDF) products, faced challenges in accurately measuring the yellowing value of their solar backsheet using conventional colorimeters. As a result, they turned to the CS-660 spectrophotometer from Hangzhou Caipu Technology, which offers advanced color measurement capabilities.
The CS-660 spectrophotometer from Hangzhou Color Spectrum Technology Co., Ltd. is designed with ergonomic features, low power consumption, and a large-capacity lithium battery, making it suitable for both lab and field use. It can measure both SCI (specular component included) and SCE (specular component excluded), ensuring accurate color readings in various applications. The device includes built-in software with essential color equations, standard light sources, and industry-specific metrics, while optional accessories allow for testing of powders and granules.
To test the yellowing value of the solar backsheet using the CS-660, follow these steps:
Step 1: Prepare the standard and sample of the solar backsheet (Figure 3).
Step 2: Turn on the spectrophotometer, perform black and white calibration, align the standard with the test hole, and press the "Test" button. After the "drop" sound, check the results (Figure 5).
Step 3: Enter the "Sample Measurement" interface, align the sample with the test hole, press "Test," and review the results (Figure 7).
Once the measurements are complete, the yellowing value and differences between samples can be clearly seen. This data provides an accurate reflection of the product’s quality, meeting high customer expectations and improving the performance of solar modules. By enhancing product quality, the company ensures better sunlight absorption and increased power output.
Hangzhou Caipu Technology’s products are widely used across industries such as printing, coatings, automotive parts, metal, home appliances, food safety, and medical testing. With continuous innovation and a commitment to quality, the company ensures stable, high-performance solutions for customers worldwide. Through collaboration and mutual benefit, businesses can achieve sustainable growth and long-term success.
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