Screen printing and electrical properties of silver paste using a robust biopolymer binder for fine line electrode in energy devices

IF 2.8 4区 工程技术 Q2 POLYMER SCIENCE Macromolecular Research Pub Date : 2024-07-05 DOI:10.1007/s13233-024-00296-0
Young Sil Lee, Ju Hwan An, Kwan Han Yoon
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Abstract

The purpose of this study is to identify factors affecting the dispersion and printing properties of pastes that are required to form fine line width electrodes by controlling the rheological properties of pastes applied in various fields. In particular, to solve the problem of high cost and low efficiency of silver used in the front electrode of silicon solar cells, it is necessary to print uniform fine lines with high aspect ratio to achieve higher efficiency while reducing raw material consumption. In this study, ethyl cellulose (EC), a conventional general-purpose binder, and xanthan gum (XG), which is widely used as a thickener in the food industry and has excellent temperature stability and the advantage of having a high viscosity even with a small content, used as binders. An organic solution was prepared by completely dissolving the binder in a solvent, and then inorganic particles and glass flecks were added to prepare the final paste. The rheological properties of the paste were measured, and the aspect ratio and the electrical conductivity of the electrodes were assessed after screen printing and firing. The results indicated that the paste prepared with XG binder exhibited a higher overall viscosity compared to the paste with EC binder and demonstrated a superior shear-thinning behavior. The pastes with optimal printing properties were found to contain 12 wt% EC and 7 wt% XG, respectively. In the frequency sweep test, XG had higher G' and G'' than EC, showing relatively good sedimentation stability and high aspect ratio. Viscosity recovery through hysteresis test was also better for XG than EC. For the final electrical conductivity, both EC and XG showed a value of 103 Ω⋅m order. However, if the electrodes were formed from a paste made of XG, the final solar cell efficiency is expected to be higher due to the larger area receiving sunlight due to the high aspect ratio.

Graphical Abstract

This study investigates the rheological properties of pastes formulated with ethyl cellulose and xanthan gum for screen-printed electrodes in silicon solar cell fabrication. Xanthan gum-based pastes exhibit higher viscosity and better shear thinning behavior compared to ethyl cellulose-based pastes, with optimal printing properties observed at 7 wt% xanthan gum content. The findings suggest that utilizing xanthan gum-based pastes could lead to higher efficiency in silicon solar cells due to the potential for achieving larger aspect ratio electrodes

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使用坚固的生物聚合物粘合剂丝网印刷用于能源设备细线电极的银浆及其电气性能
本研究的目的是通过控制应用于不同领域的浆料的流变特性,找出影响浆料分散和印刷特性的因素,以形成细线宽电极。特别是,为了解决硅太阳能电池前电极用银成本高、效率低的问题,有必要印刷出高宽比的均匀细线,从而在降低原材料消耗的同时实现更高的效率。在这项研究中,使用了传统的通用粘合剂乙基纤维素(EC)和黄原胶(XG)作为粘合剂,黄原胶在食品工业中被广泛用作增稠剂,具有优异的温度稳定性和即使含量较少也具有高粘度的优点。先将粘合剂完全溶解在溶剂中,制备成有机溶液,然后加入无机颗粒和玻璃碎片,制备成最终的糊状物。测量了浆糊的流变特性,并评估了丝网印刷和烧制后电极的长宽比和导电性。结果表明,使用 XG 粘合剂制备的浆料与使用 EC 粘合剂制备的浆料相比具有更高的总体粘度,并表现出优异的剪切稀化性能。具有最佳印刷性能的浆料分别含有 12 wt% 的 EC 和 7 wt% 的 XG。在扫频测试中,XG 的 G' 和 G'' 比 EC 高,显示出相对较好的沉降稳定性和高纵横比。通过滞后测试,XG 的粘度恢复也比 EC 好。在最终电导率方面,EC 和 XG 的值均为 103 Ω⋅m 级。然而,如果电极是由 XG 制成的浆料形成的,由于高宽比,接受太阳光的面积更大,因此最终的太阳能电池效率预计会更高。 图解 摘要 本研究调查了用乙基纤维素和黄原胶配制的浆料在硅太阳能电池丝网印刷电极制造中的流变特性。与乙基纤维素浆料相比,黄原胶浆料具有更高的粘度和更好的剪切稀化性能,在黄原胶含量为 7 wt% 时可观察到最佳印刷性能。研究结果表明,利用黄原胶基浆料可以实现更大长宽比的电极,从而提高硅太阳能电池的效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Macromolecular Research
Macromolecular Research 工程技术-高分子科学
CiteScore
4.70
自引率
8.30%
发文量
100
审稿时长
1.3 months
期刊介绍: Original research on all aspects of polymer science, engineering and technology, including nanotechnology Presents original research articles on all aspects of polymer science, engineering and technology Coverage extends to such topics as nanotechnology, biotechnology and information technology The English-language journal of the Polymer Society of Korea Macromolecular Research is a scientific journal published monthly by the Polymer Society of Korea. Macromolecular Research publishes original researches on all aspects of polymer science, engineering, and technology as well as new emerging technologies using polymeric materials including nanotechnology, biotechnology, and information technology in forms of Articles, Communications, Notes, Reviews, and Feature articles.
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