Solar cells with an extremely thin light absorber were realized by wet chemical preparation on arrays of ZnO nanorods. The absorber consisted of an In2 S3 layer (∼20 nm thickness) and its interface region with a transparent CuSCN hole conductor. By changing the length of the nanorods (0-3.3 μm) and keeping the In2 S3 layer thickness constant at ∼20 nm, the short circuit current increased from about 2-10 mA cm2. A marked increase of the external quantum efficiency at longer wavelengths is attributed to light scattering and a solar energy conversion efficiency of 2.5% has been demonstrated.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)