翻译-银浆丝网印刷技术中连接料的影响.docxVIP

本科生毕业设计（论文）论文翻译Effect of polymer binders in screen printing techniqueof silver pastes银浆丝网印刷技术中连接料的影响学院轻工学院专业________印刷工程________导师学生学号_______201110830151______2015年03月25日Effect of polymer binders in screen printing techniqueof silver pastesAbstractSilver pastes are widely used in the front-side metallizationof crystalline silicon solar cells via screen printing technique,with an aim to print conductivelines bearing a high aspectratio which helps reduce electric resistance and improve theoverall device efficiency. Rheological features are very importantto describe the paste behaviors during screen printing as well asin the formation of fine conductive lines on wafer substrate. Inthis study, three different silver pastes and two individual components(i.e., silver powder and polymer binder) have beensystematically investigated, revealing how the altering rheologicalfeatures due to the addition of polymer binders—despite atypically low weight percentage—can significantly impact the(simulated) printing quality of a silver paste. The results point tothe imperative need to delve into the effects of polymer species,polymer molecular weight and its weight percentage in order tosystematically improve the printing performance of metal pasteswithout altering its main (powders) component.IntroductionCrystalline silicon solar cells have accounted for the mainphotovoltaic technology to date.There remain, however,numerous possibilities for further improvement in deviceperformances. Among the major directions of ongoing researchesis to improve the efficiency of the integratedmodules. In this respect, the contribution from the metalpastes, in particular front-side silver pastes, came immediatelyto our notice. An optimal front-side metallizationtypically consists of multiple fine lines (fingers) and twowider connecting lines (busbar) arranged in an H-pattern.The ability to fabricate fine conductive lines with a high aspectratio (height vs. width) is crucial in order to increase theeff