  The surface of thin-film solar cells can be tailored with photonic
nanostructures to allow light trapping in the absorbing medium. This in turn
increases the optical thickness of the film and thus enhances their absorption.
Such a coherent light trapping is generally accomplished with deterministic
photonic architectures. Here, we experimentally explore the use of a different
nanostructure, a disordered one, for this purpose. We show that the
disorder-induced modes in the film allow improvements in the absorption over a
broad range of frequencies and impinging angles.
