Rheological effect on screen-printed morphology of thick film silver paste metallization

被引：22

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

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2017年 / 28卷 / 07期

关键词：

WALL SLIP; CONCENTRATED SUSPENSIONS; POLYMER-SOLUTIONS; APPARENT SLIP; VISCOMETERS; FLOW;

D O I：

10.1007/s10854-016-6219-1

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

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.

引用

页码：5548 / 5553

页数：6