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N. Bednar, N. Severino, N. Adamovic:
"LIGHT TRAPPING IN THIN CU(IN,GA)SEz SOLAR CELLS ON TEXTURED POLYIMIDE SUBSTRATE";
Talk: 31st European Photovoltaic Solar Energy Conference and Exhibition - EU PVSEC, Hamburg, Deutschland; 09-14-2015 - 09-18-2015; in: "31st European Photovoltaic Solar Energy Conference and Exhibition - EU PVSEC", (2015), 1061 - 1064.

This work presents a light trapping possibility in Cu(In,Ga)Sei (CIGS) solar cells on polyimide
substrate achieved by surface modification of the substrate material. Polyimide substrate was treated with oxygen
plasma in a parallel plate reactor. By changing the plasma processing parameters, several samples were produced,
with different sizes of the features formed on the surface. Two samples were selected for the additional optical
simulation in order to determine the effect of the substrate topology on the light absorption in CIGS absorber layer.
The simulation was done using finite element method and both cases of TM and TE polarized excitation were
considered. The results show the improvement in absorption in both short wavelength region (due to decreased
reflectance) and long wavelength region {due to photon trapping in the absorber layer).

This work presents a light trapping possibility in Cu(In,Ga)Sei (CIGS) solar cells on polyimide
substrate achieved by surface modification of the substrate material. Polyimide substrate was treated with oxygen
plasma in a parallel plate reactor. By changing the plasma processing parameters, several samples were produced,
with different sizes of the features formed on the surface. Two samples were selected for the additional optical
simulation in order to determine the effect of the substrate topology on the light absorption in CIGS absorber layer.
The simulation was done using finite element method and both cases of TM and TE polarized excitation were
considered. The results show the improvement in absorption in both short wavelength region (due to decreased
reflectance) and long wavelength region {due to photon trapping in the absorber layer).

Light trapping, Texturization, Thin Film Solar Cell