光电子技术, 2018, 38 (4): 262, 网络出版: 2019-01-15  

丝印电极的刮印角度和银浆特性对多晶硅太阳电池性能的影响

The Effect of Sloped Squeegee Angle in Screen Printing and Silver Paste Characteristics on the Performance of Polysilicon Solar Cells
作者单位
英利绿色能源控股有限公司, 光伏材料与技术国家重点实验室, 河北 保定 071051
摘要
通过调整斜角刮板刮印角度, 并匹配不同粘度和固含量银浆, 能够做到在降低成本的同时提高电池效率而又不影响电池片印刷质量。采用三种不同刮印角度斜角刮板,银浆选用杜邦PV18系列两种不同特性的银浆, 分析银浆耗量及电池电性能结果, 测试电池栅线高度、宽度、表面形貌及表面接触电阻以观察印刷效果。结果表明:随刮印角度的增加, 银浆耗量持续降低;适当提高银浆粘度和固含量能印刷出更大高宽比的栅线, 对短路电流和电池效率都能有一定的增益。使用PV18系列银浆时粘度和固含量为390 Pa.s/91.2 %、斜角刮板采用60°时刮印角度时设计电池转换效率最高、印刷效果最好且成本较低。
Abstract
Cutting the cost and improving the cell efficiency without degrading the printing quality could be achieved by adjusting the squeegee-screen angle of sloped squeegee and matching the viscosity and solid content of silver paste. In this paper, with sloped squeegees with three different squeegee-screen angles and DuPont PV18 series silver pastes with two different characteristics, the consumption of silver paste and cell electrical properties were studied and the depth/width/surface appearance of cell grid line were measured. At the same time, contact resistance was measured to observe the printing quality. The results show that, with the increase of squeegee-screen angle, the consumption of silver paste decreases. Due to the increase of the viscosity and solid content of silver paste, higher height/width ratio of grid line has been achieved, which could improve the short-circuit current and cell efficiency. When the viscosity and solid content of DuPont PV18 series silver paste are 390 Pa.s/91.2% and squeegee-screen angle of sloped squeegee is 60°,the cell efficiency and the printing quality are the best, meanwhile the cost is relatively lower.

李翠双, 张晓朋. 丝印电极的刮印角度和银浆特性对多晶硅太阳电池性能的影响[J]. 光电子技术, 2018, 38(4): 262. LI Cuishuang, ZHANG Xiaopeng. The Effect of Sloped Squeegee Angle in Screen Printing and Silver Paste Characteristics on the Performance of Polysilicon Solar Cells[J]. Optoelectronic Technology, 2018, 38(4): 262.

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