Rapid, Chemical-Free Generation of Optically Scattering Structures in Poly(ethylene terephthalate) Using a CO₂ Laser for Lightweight and Flexible Photovoltaic Applications

Figure 2

Optical micrographs of 4 laser-processed PET samples with increasing scanning speed between the parallel laser processing lines. (a) 100 mm/s; (b) 200 mm/s; (c) 300 mm/s; (d) 400 mm/s. All samples have been processed at 15% power and at 400 μm spacing. The insets are CCI surface maps that have been set to the same scale, and horizontally the scale bar is equal to 200 μm.

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