Bifacial thin film solar cells constructed from copper indium gallium diselenide, or CIGS, may gather solar energy from both their front and back sides, possibly yielding more solar energy than traditional equivalents. However, so far, their development has resulted in very moderate energy conversion efficiency.
Bifacial thin film solar cells based on copper indium gallium diselenide or CIGS can collect solar energy from both their front and their rear side – and thus