In this work, the effects of the Mo groove (P1 line) shape on the quality and performance of final modules are investigated. A gradual sloped Mo edge is successfully realized by controlling the laser beam parameters and incidence directions. As a comparison, a sharp vertical Mo edge is also investigated. With the traditional sharp vertical groove shape, voids, cracks, and peel‐offs near the abrupt step edge of P1 lines are often found to grow within the Cu(In,Ga)Se₂ (CIGS) layer and induce unwanted growth behavior of the transparent conducting oxide (TCO) layer. With the sloped groove shape, conformal growth with a continuous surface for CIGS, Zn(O,S) buffer, and Al:ZnO TCO layers without cracks and peel‐offs at the P1 position from the ablated glass region to the pristine Mo region is successfully realized. The suppression of voids, cracks, and peel‐offs in the CIGS layer effectively reduces the number of shunting pathways for the solar modules and helps to greatly improve the fill factor and efficiency of Zn(O,S)‐based CIGS modules. Finally, a Zn(O, S)‐based CIGS module of 16.3% efficiency is obtained with a cell width of 7 mm after use of MgF₂ antireflective coating.

中文翻译：

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激光刻划的Mo槽形状对高效Zn（O，S）基Cu（In，Ga）Se2太阳能电池组件的影响

在这项工作中，研究了Mo凹槽（P1线）形状对最终模块的质量和性能的影响。通过控制激光束参数和入射方向，可以成功实现渐变的Mo边缘。作为比较，还研究了尖锐的垂直Mo边缘。采用传统的尖锐垂直凹槽形状，通常会在Cu（In，Ga）Se ₂内生长出P1线陡峭台阶边缘附近的空隙，裂纹和剥离。（CIGS）层并引起透明导电氧化物（TCO）层的有害生长行为。对于倾斜的沟槽形状，CIGS，Zn（O，S）缓冲层和Al：ZnO TCO层具有连续表面的共形生长，在从烧蚀玻璃区域到原始Mo区域的P1位置没有裂纹和剥离。成功实现。CIGS层中空隙，裂纹和剥离的抑制有效地减少了太阳能模块的分流路径数量，并有助于大大提高基于Zn（O，S）的CIGS模块的填充因子和效率。最后，使用MgF ₂减反射膜后，单元宽度为7 mm，可获得效率为16.3％的基于Zn（O，S）的CIGS模块。