Silicon solar cells with rear side diffractive gratings have been fabricated.
Fabricated solar cells are electrically planar, but optically structured (“EPOS”).
The nanoimprinted grating leads to current density gains of up to 1.8 mA/cm2.
For thinner solar cells (100 µm), the gain increases, in accordance to simulations.
Also for textured front side the grating leads to a small gain in the EQE.