Abstract
In recent years, the behavior of light and elevated temperature-induced degradation (LeTID) has seriously influence on the performance and stability of high efficiency passivated emitter and rear contact (PERC) solar cells and thus remains a crucial challenge for manufacturers. In this work, we explored the LeTID behavior of p-type boron-gallium co-doped commercial multicrystalline silicon (mc-Si) PERC cells under different firing conditions with or without hydrogenation with electron injection (HEI) treatment. It was found that kinetics of LeTID were strongly affected by the peak firing temperature, and the injection carriers could change the kinetic behavior. A fitting model was implemented to explore the influence of carrier injection on the dependence between firing conditions and LeTID behavior. This dependence relationship was explained by the variation of hydrogen concentration, which was modulated by the peak firing temperature. In addition, a trajectory equation of hydrogen and related theoretical model were established to systematically describe the mechanism that might trigger the LeTID behavior. Finally, response surface methodology (RSM) were used to explore and optimize solutions to improve performance and stability of the cells. These results were not only contribution to elucidate potential mechanism of LeTID, but also to guide the development matching commercial PERC cells.
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The data that support the findings of this study are available from the corresponding author upon reasonable request.
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Acknowledgements
This thesis would not have been possible without the consistent and valuable reference materials that I received from my supervisor, whose insightful guidance and enthusiastic encouragement in the course of my shaping this thesis definitely gain my deepest gratitude.
Funding
This project is supported by The National Natural Science Foundation of China (grant No. 61804066), The Natural Science Foundation of Jiangsu Province (grant No. BK20180596, BK20180601), China Postdoctoral Science Foundation (2020 M671602), Jiangsu Postdoctoral Science Foundation (2020K143B), Postgraduate Research & Practice Innovation Program of Jiangsu Province (grant No. KYCX20_1770).
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All authors have contributed to the concept, data collection, data analysis and interpretation of the paper. Shaomin Li contributed to data processing and analysis, and write the first draft. Xi Xi was mainly responsible for organizing the concept of the article and guiding the overall content. Guilin Liu polished previous versions of manuscript. Lan Wang participated in data collection, Liping Chen participated in data collection, Yanfeng Jiang commented on the manuscript. All authors read and approved the final manuscript.
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Li, S., Xi, X., Liu, G. et al. Potential Mechanism of LeTID Dynamic Behavior Dependent on Firing and Hydrogenation with Electron Injection. Silicon 14, 11443–11451 (2022). https://doi.org/10.1007/s12633-022-01831-3
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DOI: https://doi.org/10.1007/s12633-022-01831-3