In order to ensure that solar cells achieve ideal transmittance and reflectivity after depositing ITO films, solar cell manufacturers usually use high-precision testing equipment to conduct scientific testing after the deposition process. This indirectly ensures that the output power, performance and performance of solar cells are stable and efficient when put into practical applications. In order to help solar cell manufacturers scientifically evaluate whether their performance meets the production standards of the deposition process when producing solar cells, Millennial Solar has produced the Spectrophotometer that can efficiently and scientifically detect the light transmittance of deposited films. This equipment adopts a new control data processing function and is based on scientific technical principles to make the analysis smoother and the operation more convenient!

Spectrophotometer - Provides Accurate and Stable Performance Evaluation

Spectrophotometer is a high-precision testing equipment used to measure the transmittance, reflectivity and absorbance of ITO films and various types of films and materials, thereby helping solar cell manufacturers to effectively evaluate the photoelectric conversion rate of solar cells. The equipment uses the most advanced four-zone segmented sector signal collection chopper. During the operation of the chopper, the sample and reference signals are separated and corrected by their respective black zone signals. This ensures that the most accurate detection data is obtained every time.

Four-zone segmented sector signal collection chopper

The integrating sphere with a diameter of 100mm used by the Spectrophotometer uses an optical polytetrafluoroethylene coating. The reflectivity of the coating in the visible area is close to 100%, and it can ensure no yellowing and stable optical performance in long-term use.Provides strong support for solar cell efficiency analysis.

Unique Optical Technology, Powerful Instrument Performance

Spectrophotometer adopts a unique dual-beam optical design, which can greatly reduce the interference of the detection equipment on the solar cell substrate during the test process. In the deposition process of solar cells, Spectrophotometer can perfectly correct the absorbance changes of the solar cell substrate after thin film deposition, thereby stably measuring the sample. Spectrophotometer supports the measurement of solar transmittance in a wide range of wavelengths from the ultraviolet region to the near-infrared region, and ensures that stray light can be effectively reduced during quality inspection of solar cells, thereby achieving high-precision measurement.

Meet a variety of film testing needs and achieve targeted performance testing

Since there are many types of solar cells, the thin film material selected before being put into actual use also needs to vary depending on the type. Among them, the most widely used ITO film, which can be used as a transparent conductive layer and electrode, thereby converting the solar light absorbed by the solar cell into electrical energy, protecting and enhancing the performance of the solar cell.

Transmittance and reflectivity in different wavebands

Therefore, the ITO film must have appropriate electrical and optical properties, and electrical and optical properties affect each other and must be optimized at the same time to achieve the ideal output power of the solar cell. The UV, visible and near infrared region measurement provided by Spectrophotometer in the 190-2800nm range can fully meet the needs of collecting reflectance and transmittance data of ITO films in the full band of 300-1200nm, and generate real-time data and two-dimensional data based on the data processing function. The map helps solar cell manufacturers effectively optimize the performance of solar cells when depositing ITO films and various types of thin film materials, and facilitates their efficient production! 

Quality inspection and assurance of a finished product is extremely important for all walks of life. If an untested solar cell is put into practical application based on theoretical reasoning, the problems encountered are often: It is difficult to make up for or adjust in the future. In order to help solar cell manufacturers produce ideal solar cells, Millennial Solar provides many testing equipment such as Spectrophotometer to provide guarantee for solar cells from production to completion, and help solar cell manufacturers to carry out efficient production and scientific evaluation of solar cells!