Laser Ablation Modeling of CIGS Solar Cells

S. Grubinskas, and G. Raciukaitis
Center for Physical Sciences and Technology
Vilnius, Lithuania

Structure under consideration was a layered medium consisting of various materials depending on the specific solar cell. Three processes are considered: energy coupling by electrons taking into account interference effects between the layers, energy transfer from electrons to the lattice using a two-temperature model for heat dissipation and phase transitions in materials.

Incident time-harmonic transverse electric field plane wave was considered. Also periodic Floquet boundary conditions were used on exterior pairs of boundaries. Energy coupling profiles deviate significantly from their usual exponential form. We draw conclusion that selectivity of the ablation process depends on selectivity of the laser energy coupling.