Enhancement of laser-induced rear surface spallation by pyramid textured structures on silicon wafer solar cells

被引:10
作者
Du, Z. R. [1 ,2 ]
Palina, N. [1 ]
Chen, J. [1 ]
Aberle, A. G. [1 ,2 ]
Hoex, B. [1 ]
Hong, M. H. [1 ,2 ]
机构
[1] Natl Univ Singapore, Solar Energy Res Inst Singapore, Singapore 117574, Singapore
[2] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore
来源
OPTICS EXPRESS | 2012年 / 20卷 / 23期
基金
新加坡国家研究基金会;
关键词
ABLATION; WATER;
D O I
10.1364/OE.20.00A984
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Pulsed laser ablation is increasingly being applied to locally open the rear dielectric layer of advanced silicon wafer solar cell structures, such as aluminum local back surface field solar cells. We report that the laser ablation process on the rear surface of the solar cell at a relatively low laser fluence can cause undesirable spallation at the front surface which is textured with random upright pyramids. This phenomenon is attributed to the enhancement of the surface spallation effect by up to 3 times due to the confinement of the pressure waves at the tips of these random pyramids. Laser ablation at different laser focus positions and laser fluences is carried out to achieve optimized laser processing of the solar cells. (C) 2012 Optical Society of America
引用
收藏
页码:A984 / A990
页数:7
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