Laser-induced forward transfer (LIFT) has the advantage of the absence of contact and masking, which is beneficial for the front-side metallization of solar cells. However, due to the influence of the interaction between adjacent pulses, it is difficult to obtain continuous lines with a high resolution. In this paper, by optimizing relevant parameters (laser fluence, gap distance, viscosity, spot size, and spot pitch), we demonstrate that silver lines with a high resolution and high aspect ratio (thickness over width) can be printed stably. The printing of single-voxel aims to initially determine the range of parameters necessary to generate high-resolution and high-aspect ratio voxels. Subsequently, based on this parameter range, lines are printed at different spot pitches to define the optimal parameters required to produce continuous lines. A comparison of two different viscosities (250 and 50 Pa·s) reveals that high-resolution continuous lines can only be realized at a viscosity of 50 Pa·s. In addition, the continuous lines printed at a large spot size (150 μm) are more uniform and narrower than those printed at a small spot size (60 μm). Finally, according to the optimal parameters (50 Pa·s viscosity, 150 μm spot size, 30 μm gap distance, 70 μm spot pitch, and 1.3 J/cm² laser fluence), continuous lines with a 44 μm width and 0.54 aspect ratio are achieved via the single-step printing process.

激光诱导的正向转移（LIFT）的优点是没有接触和掩膜，这对太阳能电池的正面金属化是有益的。然而，由于相邻脉冲之间的相互作用的影响，难以获得具有高分辨率的连续线。在本文中，通过优化相关参数（激光注量，间隙距离，粘度，光斑尺寸和光斑间距），我们证明了可以稳定地打印具有高分辨率和高纵横比（厚度与宽度）的银线。单体素的打印旨在初步确定生成高分辨率和高纵横比的体素所需的参数范围。随后，基于此参数范围，以不同的点距打印线条，以定义产生连续线条所需的最佳参数。两种不同粘度（250和50 Pa·s）的比较显示，高分辨率连续线只能在50 Pa·s的粘度下实现。此外，以大光点尺寸（150微米）打印的连续线比以小光点尺寸（60微米）打印的连续线更均匀，更窄。最后，根据最佳参数（50 Pa·s粘度，150μm的光斑尺寸，30μm的间隙距离，70μm的光斑间距和1.3 J / cm^2个激光注量），通过单步打印过程即可获得宽度为44μm，纵横比为0.54的连续线。