莫丽玢,赵雷,周春兰,张宇阳,王文静.乙基纤维素和聚酰胺蜡在晶硅太阳电池电极材料中的应用[J].稀有金属材料与工程,2019,47(3):994~1000.[molibin,zhao lei,zhou chunlan,zhang yuyang,wang wenjing.The Effect of Ethyl Cellulose and Polyamide Wax in Ag paste as Electrodes in Silicon Solar Cells[J].Rare Metal Materials and Engineering,2019,47(3):994~1000.]
乙基纤维素和聚酰胺蜡在晶硅太阳电池电极材料中的应用
投稿时间:2017-08-08  修订日期:2017-11-06
中文关键词:  乙基纤维素  聚酰胺蜡  正银浆料  触变性能  丝印特性
基金项目:国家自然科学基金资助 (项目号:61504150,61674151)和国家高技术研究发展计划(863) 资助(项目号:2015AA050302)
中文摘要:
      本文通过分析乙基纤维素和聚酰胺蜡在不同溶剂和载体中的粘度及触变性能的作用规律,以研究其对太阳电池正银浆料的丝印特性和电池电极形貌、致密度及电学性能等的关系。发现乙基纤维素和聚酰胺蜡在溶剂中对溶液的粘度分别起到了不同的作用,从而影响着正银浆料的触变和流变性能。其中,乙基纤维素在溶液中的主要作用是提高浆料的整体粘度,而聚酰胺蜡在溶液中的主要起着增强浆料剪切变稀的能力。由于浆料的丝印特性主要是通过调节浆料的触变性能来优化的,因此乙基纤维素和聚酰胺蜡在浆料中的比例对浆料的丝印特性起着十分关键的作用。通过对比乙基纤维素和聚酰胺蜡在浆料中的不同比例对其触变性能及对电池正面电极形貌、致密度和电阻率的影响,结果表明当乙基纤维素与聚酰胺蜡在浆料中的比例为1:5时,正银浆料能达到一个较好的印刷性能。
The Effect of Ethyl Cellulose and Polyamide Wax in Ag paste as Electrodes in Silicon Solar Cells
英文关键词:Ethyl Cellulose  Polyamide Wax  Ag paste  Thixotropy  Screen-printing
英文摘要:
      Solar cell is currently one of the most promising renewable energy technologies. At present, crystalline silicon (c-Si) solar cell is the most widely used photovoltaic cells and cover 90% market share of the world total PV cell production. Front side Ag paste is a key material in c-Si solar cells because it is the main channel of conducting photocurrent. In general, to gain a higher conversion efficiency for solar cell, the low series resistance and the high short-circuit current is required by optimizing Ag paste and its grid. The rheological behavior is very improtant for Ag paste because it can adjust the screen-printing performace and make the grid has a good morphology to enhance the short circuit current and reduce the series resistance for solar cells. Ethyl cellulose is the most common thickeners, which can be used to adjust the viscosity of pastes. And polyamide wax is an important thixotropic agent that can be used to adjust the rheologic performance of pastess. In this work, The additives ethyl cellulose and polyamide wax of positive Ag paste with different viscosity and rheological behavior was studied to optimize the screen printing performance of the Ag paste, the morphology, densification and resistivity of Ag electrodes. The role of ethyl cellulose and polyamide wax on the viscosity as well as on rheological behavior was different. Ethyl cellulose was mainly used to improve the viscosity of the Ag paste while polyamide wax was used to improve capability of shear-thinning of the Ag paste. Because screen-printing performance is mainly determined by rheological behavior, the ratio of ethyl cellulose over polyamide wax became thus critical. By comparing morphology, densification and resistivity of Ag electrodes, we found the ratio of ethyl cellulose over polyamide wax was 1:5 in our case. Besides, the screen-printing performance of the paste with this ratio is also optimized. The development of new Ag paste and the way of optimizing performance of the Ag paste reported in this paper is very beneficial to further improve the efficiency of current commercial silicon based solar cells.
作者单位E-mail
莫丽玢 中国科学院电工研究所 molibin@mail.iee.ac.cn 
赵雷 中国科学院电工研究所  
周春兰 中国科学院电工研究所  
张宇阳 中国科学院电工研究所  
王文静 中国科学院电工研究所  
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