研究目的
To design and construct an automated Electroluminescent Imaging System for analyzing the series resistance of solar cells with high accuracy and low cost.
研究成果
The automated ELIT system successfully provided both qualitative and quantitative series resistance measurements for solar cells at a fraction of the cost of commercial systems. A 3.6% difference in series resistance values was observed compared to conventional I-V measurement methods, demonstrating the system's accuracy and potential for widespread application.
研究不足
The system's accuracy is currently validated only for 4 busbar solar cells, with ongoing optimizations for 3 and 5 busbar configurations. The sensitivity to the number of busbars may affect the series resistance measurements.
1：Experimental Design and Method Selection:
The ELIT system was designed to automate the image capturing and analysis process for evaluating the series resistance of solar cells. It includes a dark enclosure, a camera for capturing infrared emissions, and a power supply for applying current.
2：Sample Selection and Data Sources:
Solar cells with 3 to 5 busbars were used. The images captured were processed using MATLAB for series resistance calculation.
3：List of Experimental Equipment and Materials:
Pentax K100D camera, Zup 10-20 power supply, Wi-Fi SD card, MATLAB software.
4：Experimental Procedures and Operational Workflow:
The solar cell is forward biased, and its infrared emission is captured by the camera. The images are sent wirelessly to a computer for processing.
5：Data Analysis Methods:
The series resistance was calculated using MATLAB based on the electroluminescence signal's linear dependence on the supplied voltage.
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