Ultra-Lean Silver Screen-Printing for Sustainable Terawatt-Scale Photovoltaic

IF 6 3区 工程技术 Q2 ENERGY & FUELS
Solar RRL Pub Date : 2024-07-27 DOI:10.1002/solr.202400478
Yuchao Zhang, Sisi Wang, Li Wang, Zhenyu Sun, Yuan-Chih Chang, Ran Chen, Catherine Chan, Kuninori Okamoto, Yiwei Ao, Dongliang Wang, Marwan Dhamrin, Tsuji Kosuke, Brett Hallam
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引用次数: 0

Abstract

As the photovoltaics industry approaches the terawatt (TW) manufacturing scale, the consumption of silver in screen-printed contacts must be significantly reduced for all cell architectures to avoid risks of depleting the global silver supply and substantial cost inflations. With alternative metallization techniques (e.g., plating) facing their own challenges for mass production, advancements in the mainstream screen-printing technology to accelerate the pace of silver reductions are urgently needed. This work presents a silver-lean screen-printed contact scheme, providing scope for substantial reductions in silver consumption based on existing industrial screen-printing capabilities. The initial testing of such a design leads to the fabrication of 24.04% efficient large-area TOPCon solar cells with 9 mg W−1 silver consumption compatible with existing soldering-based interconnection technologies, corresponding to a 25%rel reduction in silver usage compared to standard industrial screen-printed TOPCon solar cells. Upon further optimization in pattern designs and fabrication processes, this silver-lean design offers a promising pathway toward ultra-low silver consumption of less than 2 mg W−1 for screen-printed TOPCon solar cells without sacrificing efficiency.

Abstract Image

Abstract Image

用于可持续兆瓦级光伏发电的超简洁银屏印刷技术
随着光伏产业接近太瓦(TW)的生产规模,所有电池结构的丝网印刷触点的银消耗量必须大幅减少,以避免全球银供应枯竭和成本大幅上升的风险。由于替代金属化技术(如电镀)在大规模生产中面临着自身的挑战,因此迫切需要在主流丝网印刷技术方面取得进展,以加快减少银用量的步伐。这项工作提出了一种无银丝网印刷触点方案,在现有工业丝网印刷能力的基础上提供了大幅减少银消耗的空间。通过对这种设计的初步测试,制造出了效率为 24.04% 的大面积 TOPCon 太阳能电池,其 9 mg W-1 的银消耗量与现有的基于焊接的互连技术兼容,与标准的工业丝网印刷 TOPCon 太阳能电池相比,银用量减少了 25%。在进一步优化图案设计和制造工艺后,这种无银设计将为丝网印刷 TOPCon 太阳能电池在不牺牲效率的前提下实现低于 2 mg W-1 的超低耗银量提供一条可行之路。
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来源期刊
Solar RRL
Solar RRL Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
12.10
自引率
6.30%
发文量
460
期刊介绍: Solar RRL, formerly known as Rapid Research Letters, has evolved to embrace a broader and more encompassing format. We publish Research Articles and Reviews covering all facets of solar energy conversion. This includes, but is not limited to, photovoltaics and solar cells (both established and emerging systems), as well as the development, characterization, and optimization of materials and devices. Additionally, we cover topics such as photovoltaic modules and systems, their installation and deployment, photocatalysis, solar fuels, photothermal and photoelectrochemical solar energy conversion, energy distribution, grid issues, and other relevant aspects. Join us in exploring the latest advancements in solar energy conversion research.
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