This study experimentally and numerically investigates a light management strategy to enhance the absorption of ultrathin CIGSe solar cells using a functional back contact with SiO2 nanostructure scatterers and a gold reflector. JCMsuite was used for detailed optical simulations. These simulations were crucial for understanding the complex light-trapping effects, optimizing the nanostructure geometry, and corroborating the experimental external quantum efficiency trends.
M. Demir et al. Ultrathin Cu(In,Ga)Se2 solar cells: enhanced absorption by nanotextured functional back contacts. J. Phys. Energy 7, 045003 (2025).