Molecular electronic tuning of Si surfaces

Rami Cohen*, Noemi Zenou, David Cahen, Shlomo Yitzchaik

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

86 Scopus citations

Abstract

Assembling quinolinium-based chromophores on silicon surfaces provides a new route to electronic control over such semiconducting surfaces. The two-step process by which the molecules are grafted on to the surface involves first coupling the organic functionality to silicon, followed by chromophore anchoring. These synthetic steps are monitored by XPS, UV - Vis and FTIR spectroscopies. Using contact potential difference measurements we found that the electron affinity of the modified silicon is a function of the molecule's dipole moment. The same technique shows a pronounced effect of the sub-nanometer siloxane-based, coupling-agent, layer by itself on the band bending and band-bending modification as function of chromophore adsorption.

Original languageAmerican English
Pages (from-to)270-274
Number of pages5
JournalChemical Physics Letters
Volume279
Issue number5-6
DOIs
StatePublished - 21 Nov 1997

Bibliographical note

Funding Information:
SY acknowledges support for this research by the Israel Science Foundation. DC thanks the US-Israel Binational Science Foundation, and the Minerva Foundation, Munich, for partial support. We thank Dr. Hagai Cohen for his help in the XPS measurements.

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