Engineering the interface energetics of solar cells by grafting molecular properties onto semiconductors

Dori Gal, Eli Sonea, R. Cohen, G. Kodes, J. Libman, A. Shanzer, H. W. Schock, David Cahen

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


The electronic properties of semiconductor surfaces can be controlled by binding tailor-made ligands to them. Here we demonstrate that deposition of a conducting phase on the treated surface enables control of the performance of the resulting device. We describe the characteristics of the free surface of single crystals and of polycrystalline thin films of semiconductors that serve as absorbers in thin film polycrystalline, heterojunction solar cells, and report first data for actual cell structures obtained by chemical bath deposition of CdS as the window semiconductor. The trend of the characteristics observed by systematically varying the ligands suggests changes in work function rather than in band bending at the free surface, and implies that changes in band line-up, which appear to cause changes in band bending, rather than direct, ligand-induced band bending changes, dominate.

Original languageEnglish
Pages (from-to)487-496
Number of pages10
JournalProceedings of the Indian Academy of Sciences: Chemical Sciences
Issue number6
StatePublished - 1997
Externally publishedYes


  • Cds deposition
  • Cdte crystals
  • Photovoltaics
  • Semiconductor surfaces
  • Solar cells


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