Controlling surfaces and interfaces of semiconductors using organic molecules

Rami Cohen, Stephane Bastide, David Cahen, Jacqueline Libman, Abraham Shanzer, Yossi Rosenwaks

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Control over semiconductor surface energetics can be achieved using different chemisorbed organic molecules with diverse electronic properties. We find evidence of such control over CdTe upon adsorption of dicarboxylic acid derivatives with different substituted phenyl rings. FT-IR measurements show that the dicarboxylic acid derivatives bind as carboxylates to form approximately one monolayer. Such chemisorption modifies both the band bending and the electron affinity (up to 500 and 700 mV, respectively), as measured by contact potential difference (CPD). Changes in band bending result from_a coupling between molecular orbitals and surface states close to the valence band and depend on the withdrawing character of the phenyl substituent. A model is presented to interpret and explain the data.

Original languageEnglish
Pages (from-to)394-400
Number of pages7
JournalOptical Materials
Volume9
Issue number1-4
DOIs
StatePublished - Jan 1998
Externally publishedYes

Funding

We thank the Israeli Science Ministry, Forschungszentrum Jiilich (KFA), Minerva Foundation, Munich and the Tashtyoth program of the Israeli Science Ministry for support.

FundersFunder number
Israeli Science Ministry
Kimberley Foundation Australia
Minerva Foundation
Forschungszentrum Jülich

    Fingerprint

    Dive into the research topics of 'Controlling surfaces and interfaces of semiconductors using organic molecules'. Together they form a unique fingerprint.

    Cite this