有机溶剂对太阳能电池银浆丝网印刷影响的研究

Study on the Influence of Organic Solvents on Printing Performance of Silver Past on Solar Cell Screen

分别以不同比例的松油醇混合相同质量的银浆(9组),在流畅、无断栅虚印等不良状况的前提下进行丝网印刷、烧结,得出不同高宽比的印刷栅线及相应电性能参数。引入丝网印刷产能计算公式评价各组优劣情况,以获得最优实验组。实验证明有机溶剂的添加对银浆粘度有着灵敏的调节作用。随着添加溶剂质量分数的增大,银浆粘度逐渐降低,以此提高了印刷速度,但速度存在峰值,即溶剂用量必须维持在特定的范围内,才能在保证单片电性能的同时通过提高印刷流畅性获得更大的产能。

Terpineol were added to silver paste in different ratios （9 ratio group） to produce a smooth and intact paste. The paste was printed on solar cell screen and sintered, and then different high and wide printing lines formed on the screen and the corresponding electric parameters were measured. The screen printing productivity calculation formula was adopted to evaluate the performance of 9 different test groups, showing the organic solvent addition can largely adjust the viscosity of silver paste. With the increase of terpineol, the viscosity of the paste was lowering gradually and the printing was speeding up. But too low viscosity would slow down the printing. The amount of terpineol added to silver paste must be properly controlled in order to maximize the productivity as well as to guarantee the single electrical performance at the same time.