Si-based solar cells and modules are very inefficient absorbing the UV light and present low external quantum efficiency (EQE) in this region mainly because (i) absorption and reflection losses
caused by the front glass, (ii) absorption in the encapsulation material, (iii) parasitic absorptions and reflections due to the optimized λ/4 anti-reflective coatings at 600 nm, and (iv) high recombination rates in the heavily doped emitter [5].