Cu(In,Ga)Se2 solar cells were fabricated on flexible borosilicate ultra-thin glass.
Performances were compared to those of cells fabricated on rigid soda-lime glass.
Cu(In,Ga)Se2 layer properties were investigated notably by quantitative GD-OES.
Differences are due to a lower Na supply in the case of ultra-thin glass substrates.
The impact of cell bending on photovoltaic characteristics was studied.