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用于带有硼发射极的n型太阳能电池的低复合穿透铝浆

Low Recombination Firing-Through Al Paste for N-Type Solar Cell with Boron Emitter.

作者信息

Zhu Peng, Liu Yuan, Cao Chengjiang, Tian Juan, Zhang Aichuang, Wang Deliang

机构信息

College of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China.

Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology, Changzhou University, Changzhou 213164, China.

出版信息

Materials (Basel). 2021 Feb 6;14(4):765. doi: 10.3390/ma14040765.

DOI:10.3390/ma14040765
PMID:33561983
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7915839/
Abstract

A kind of low recombination firing-through screen-printing aluminum (Al) paste is proposed in this work to be used for a boron-diffused N-type solar cell front side metallization. A front side fire-through contact (FTC) approach has been carried out for the formation of local contacts for a front surface passivated solar cell. With a low contact resistivity (ρ) of 1.0 mΩ·cm, good ohmic contact between the boron-doped front surface of the silicon sample and the Al paste was realized. To obtain a good energy conversion efficiency, a balance can be achieved between the open circuit voltage (V) and contact resistivity (ρ) of the cell by combining suitable Al powders and appropriate additives. The detailed micro-contact difference in Si/metallization between the firing-through Al paste and silver-aluminum (Ag-Al) paste was analyzed. The dark saturation current density beneath the metal contact (J) of the Si/metallization region using our firing-through Al paste was discussed, which was proven to be 61% lower than using Ag-Al paste. The pseudo energy conversion efficiency of the cell using Al paste measured by Suns-V was also higher than using Ag-Al paste. The role of Al paste in low surface metal recombination is discussed. The utilization of this new kind of Al paste was much cheaper and more convenient, compared to the traditional process using Ag or Ag-Al paste.

摘要

本文提出了一种用于硼扩散N型太阳能电池正面金属化的低复合穿透式丝网印刷铝（Al）浆料。为了形成正面表面钝化太阳能电池的局部接触，采用了正面穿透式接触（FTC）方法。硅样品的硼掺杂正面与Al浆料之间实现了低至1.0 mΩ·cm的接触电阻率（ρ），形成了良好的欧姆接触。为了获得良好的能量转换效率，通过组合合适的Al粉末和适当的添加剂，可以在电池的开路电压（V）和接触电阻率（ρ）之间实现平衡。分析了穿透式Al浆料与银铝（Ag-Al）浆料在硅/金属化方面的详细微观接触差异。讨论了使用我们的穿透式Al浆料的Si/金属化区域金属接触下方的暗饱和电流密度（J），结果表明该值比使用Ag-Al浆料时低61%。通过Suns-V测量的使用Al浆料的电池的伪能量转换效率也高于使用Ag-Al浆料时的效率。讨论了Al浆料在低表面金属复合中的作用。与使用Ag或Ag-Al浆料的传统工艺相比，这种新型Al浆料的使用成本更低且更方便。

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本文引用的文献

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