Product Code: ICA10_M1305

Scribing of Thin Films with Picosecond Laser Pulses for CIGS Solar Cells
Authors:
P. Gecys, Laboratory for Applied Research, Center for Physical Science and Technology; Vilnius Lithuania
G. Raciukaitis, Laboratory for Applied Research, Center for Physical Science and Technology; Vilnius Lithuania
M. Gedvilas, Laboratory for Applied Research, Center for Physical Science and Technology; Vilnius Lithuania
A. Braun, Solarion Ag; Leipzig Germany
S. Ragnow, Solarion Ag; Leipzig Germany
Presented at ICALEO 2010

Laser scribing is an important step to preserve high efficiency of thin-film photovoltaic devices over large areas by production integral interconnects. The results on picosecond laser application in the Cu(InGa)Se2 (CIGS) Solar cell scribing with different wavelength and beam profile are presented. Both, wavelength and beam profile are of essential importance for the selectivity of the ablation process and for the efficiency. The complex absorber layer of copper-indium-gallium diselenide is a thermo-sensitive material, and laser processing might provoke undesirable modification photo-electrical properties of the material. Therefore, the scanning electron microscopy, electron-dispersion spectrometry and micro-Raman have been used to evaluate the processing results to show benefits of the used picosecond lasers in selective scribing on this type of photovoltaics structures.