Applications of laser precisely processing technology in solar cells
Hong-jie Wang, Hua Cheng, Kang-wen Xie, Fu-yun Lu, Yong-chao Du
Optoelectronics Letters ›› 2007, Vol. 3 ›› Issue (5) : 385-387.
Applications of laser precisely processing technology in solar cells
According to the design method of laser resonator cavity, we optimized the primary parameters of resonator and utilized LD arrays symmetrically pumping manner to implementing output of the high-brightness laser in our laser cutter, then which was applied to precisely cutting the conductive film of CuInSe2 solar cells, the buried contact silicon solar cells’ electrode groove, and perforating in wafer which is used to the emitter wrap through silicon solar cells. Laser processing precision was less than 40 μ m, the results have met solar cell’s fabrication technology, and made finally the buried cells’ conversion efficiency be improved from 18% to 21%.
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