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

Figure 3

Optical micrographs of 4 laser-processed PET samples with increasing laser power. (a) 5%; (b) 10%; (c) 15%; (d) 20%. All samples have been processed at a scanning speed of 200 mm/s 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.

(a)

(b)

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(d)