A Sb2(S1-x/Sex)3 graded-composition is obtained by a sequential deposition of Sb 2S3 and Sb2Se3 onto a mesoporous TiO2 photoelectrode followed by thermal annealing at 300 C. The compositional graded-solar cells exhibit a greatly enhanced performance compared to pristine Sb2S3-sensitized or Sb2Se 3-sensitized solar cells. The best performing cell, delivering an incident-photon-to-current efficiency extended to 1050 nm, exhibits an overall power conversion efficiency of 6.6% under simulated illumination.
- graded composition
- heterojunction solar cells
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- General Materials Science