文献类型：期刊文献

英文题名：Rheological effect on screen-printed morphology of thick film silver paste metallization

作者：Zhou, Yingying[1];Tong, Hua[1];Liu, Yujie[2];Yuan, Shuanglong[1];Yuan, Xiao[1];Liu, Cui[1];Zhang, Yuancheng[2];Chen, Guorong[1];Yang, Yunxia[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]Shanghai Solar Energy Res Ctr Co, Shanghai 200241, Peoples R China

年份：2017

卷号：28

期号：7

起止页码：5548

外文期刊名：JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS

收录：;EI(收录号：20170203226321);WOS:【SCI-EXPANDED(收录号:WOS:000397601500054)】；

基金：This study was supported by Shanghai Science and Technology Committee Project (No. 15dz1201102). We also thank National 863 program (D200-6-1401).

语种：英文

外文关键词：Viscosity - Silicon - Metallizing - Silicon solar cells - Silver - Topography

摘要：Up to now the topography of thick film silver paste metallization is still a great challenge to the crystalline silicon solar cell manufacturers due to lack of overall understanding about the dependence of screen-printed morphology on paste rheology. In this article, we demonstrate that both the shear thixotropy and wall slip are primary rheological behaviors of pastes affecting screen-printed morphology. By comparison among three different commercial pastes, the association of screen-printed morphology with apparent viscosity and slip velocity of pastes were investigated. The results from printing finger lines with designed width of 45 mu m show clearly that the widening degree of lines is associated with the paste viscosity, and the height and cross-sectional profile of lines mainly rely on the wall slip velocity of paste passing through screen meshes. Briefly, the lower the apparent viscosity, the wider the lines; and the greater the wall slip velocity, the less the line height and more likely the formation of trapezoidal cross-sectional profile with larger area. Our study shows for the first time that the wall slip of pastes may produce significant influence on cell efficiency, since its influence on screen-printed morphology is considerably remarkable and vital.