摘要
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,电池栅线电极的高宽比达到最大值,同时栅线电极的线电阻也达到最小值,因此正银浆料达到一个较好的印刷性能。
The additives ethyl cellulose and polyamide wax of positive Ag paste with different viscosities and rheological behaviors were studied to optimize the screen printing performance of the Ag paste, the morphology, densification and resistivity of Ag electrodes. The roles of ethyl cellulose and polyamide wax in the viscosity as well in rheological behavior were 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 becomes thus critical. By comparing morphology, densification and resistivity of Ag electrodes, we find that the optimum ratio of ethyl cellulose over polyamide wax is 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 are very beneficial to further improve the efficiency of current commercial silicon based solar cells.
作者
莫丽玢
赵雷
周春兰
张宇阳
王文静
Mo Libin;Zhao Lei;Zhou Chunlan;Zhang Yuyang;Wang Wenjing(Key Laboratory of Solar Thermal Energy and Photovoltaic System,Institute of Electrical Engineering, Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2019年第3期994-1000,共7页
Rare Metal Materials and Engineering
基金
国家自然科学基金(61504150
61674151)
国家高技术研究发展计划("863"计划)(2015AA050302)
