Benefit of textured CIGS cells for low reflecting nanogrid application
conference paper
Metallization of the front contact can increase the conductivity. We show the optical benefit by combining nanowire with a texture of the thin film stack. The parallel nanowires are placed in crevices of a texture in the optical model. Texturization reduces the reflection of both the stack and the nanowire. For a period of 500 nm, the reflection is virtually independent of the nanowire width for a texture height/period ratio of only 1. For a texture height of 1000 nm, the reflection is minimized with maximum of 3% (between 600 nm and 750 nm wavelength) and this would mean that the surface would appear as black, even with a surface metal coverage of 30%. Moreover, outside this wavelength range, the reflection is below 1% and marks a significant increase in current density up to 38 mA/cm2 compared to the flat layer stack (27 mA/cm2).
TNO Identifier
782772
Source title
33rd European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2017, 25 - 29 September 2017, Amsterdam
Collation
4 p.
Pages
23-26
Files
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