Adaptive automatic solar cell defect detection and classification based on absolute electroluminescence imaging

Youyang Wang, Liying Li, Yifan Sun, Jinjia Xu, Yun Jia, Jianyu Hong, Xiaobo Hu, Guoen Weng, Xianjia Luo, Shaoqiang Chen, Ziqiang Zhu, Junhao Chu and Hidefumi Akiyama

Energy, 2021, vol. 229, issue C

Abstract: Current defect inspection methods for photovoltaic (PV) devices based on electroluminescence (EL) imaging technology lack juggling both labor-saving and in-depth understanding of defects, restricting the progress towards yield improvement and higher efficiency. Herein, we propose an adaptive approach for automatic solar cell defect detection and classification based on absolute EL imaging. Specifically, we first develop an unsupervised algorithm to automatically detect defects referring to the defect features in EL images. Then a diagnosis approach is proposed, which statistically classifies the detected defects based on the electrical origin. To the best of our knowledge, the proposed method is the first effort to integrate automatic defect detection with fine-grained classification. Experimental results on multiple types of solar cells show that the proposed method can achieve the average uncertainty of 5.15% at the minimum, with by up to 98.90% optimization ratio compared with two conventional methods. The proposed method is expected to provide more guiding feedback in both practical design and reliability diagnosis of the PV industry.

Keywords: Photovoltaic cell; Absolute electroluminescence imaging; Automatic defect detection and classification; Reliability diagnosis (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:229:y:2021:i:c:s0360544221008550

DOI: 10.1016/j.energy.2021.120606

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