p型PERC双面太阳电池背面铝栅线的设计
发布时间：2019-05-17 02:04
【摘要】：钝化发射极背面接触(PERC)双面太阳电池(PERC+)背面采用丝网印刷铝栅线的设计,代替常规PERC电池背面全铝背场层,达到背面发电的效果。对不同背面铝栅线宽度的PERC+电池和常规PERC电池的电性能及激光开窗截面图进行比较,发现了不同宽度的铝栅线对电池背面空洞率和局部背表面场(LBSF)层的质量有较大影响,合适的铝栅线宽度能最大程度地保证PERC+电池的转换效率。实验得出在相同的激光开窗工艺下,当背面铝栅线设计宽度为250μm时,PERC+电池具有较好的铝栅线高宽比,烧结后的激光开窗区域形成了良好的LBSF层。同时,所有电池在测试时背景采用不反光黑布。测试结果显示,最优组的PERC+电池平均正面转换效率达到21.21%、平均背面转换效率达到13.97%。
[Abstract]:The design of screen printed aluminum grid line is adopted on the back of passivated emitter contact (PERC) double-sided solar cell (PERC), which replaces the all-aluminum back field layer on the back of conventional PERC battery to achieve the effect of back power generation. The electrical performance and laser window section diagram of PERC battery with different back aluminum grid wire width and conventional PERC battery are compared. It is found that the aluminum grid line with different width has a great influence on the cavitation rate on the back of the battery and the quality of the (LBSF) layer on the local back surface field. The suitable width of aluminum grid line can ensure the conversion efficiency of PERC battery to the greatest extent. The experimental results show that under the same laser window opening process, when the design width of the back aluminum grid line is 250 渭 m, the PERC battery has a good aspect ratio of the aluminum grid line, and a good LBSF layer is formed in the sintered laser windowing area. At the same time, all batteries in the test background using non-reflective black cloth. The test results show that the average positive conversion efficiency and back conversion efficiency of PERC battery in the optimal group are 21.21% and 13.97% respectively.
【作者单位】： 国家电投集团西安太阳能电力有限公司;
【分类号】：TM914.4
本文编号：2478719
[Abstract]:The design of screen printed aluminum grid line is adopted on the back of passivated emitter contact (PERC) double-sided solar cell (PERC), which replaces the all-aluminum back field layer on the back of conventional PERC battery to achieve the effect of back power generation. The electrical performance and laser window section diagram of PERC battery with different back aluminum grid wire width and conventional PERC battery are compared. It is found that the aluminum grid line with different width has a great influence on the cavitation rate on the back of the battery and the quality of the (LBSF) layer on the local back surface field. The suitable width of aluminum grid line can ensure the conversion efficiency of PERC battery to the greatest extent. The experimental results show that under the same laser window opening process, when the design width of the back aluminum grid line is 250 渭 m, the PERC battery has a good aspect ratio of the aluminum grid line, and a good LBSF layer is formed in the sintered laser windowing area. At the same time, all batteries in the test background using non-reflective black cloth. The test results show that the average positive conversion efficiency and back conversion efficiency of PERC battery in the optimal group are 21.21% and 13.97% respectively.
【作者单位】： 国家电投集团西安太阳能电力有限公司;
【分类号】：TM914.4
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