title: Photoluminescence through in-gap states in phenylacetylene functionalized silicon nanocrystals.
abstract: Optoelectronic properties of Si nanocrystals (SiNCs) were studied by combining scanning tunneling spectroscopy (STS) and optical measurements. The photoluminescence (PL) of phenylacetylene functionalized SiNCs red shifts relative to hexyl- and phenyl-capped counterparts, whereas the absorption spectra and the band gaps extracted from STS are similar for all surface groups. However, an in-gap state near the conduction band edge was detected by STS only for the phenylacetylene terminated SiNCs, which can account for the PL shift via relaxation across this state.
authors.affiliation: WACKER-Lehrstuhl für Makromolekulare Chemie, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany. rieger@tum.de.
authors.forename: Arzu
authors.initials: A
authors.lastname: Angı
authors.affiliation: Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2.
authors.forename: Regina
authors.initials: R
authors.lastname: Sinelnikov
authors.affiliation: Department of Physics, University of Alberta, Edmonton, Alberta T6G 2G2, Canada.
authors.forename: Al
authors.initials: A
authors.lastname: Meldrum
authors.affiliation: Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2.
authors.forename: Jonathan G C
authors.initials: JG
authors.lastname: Veinot
authors.affiliation: Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel. milode@mail.huji.ac.il.
authors.forename: Isacc
authors.initials: I
authors.lastname: Balberg
authors.affiliation: Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel. milode@mail.huji.ac.il.
authors.forename: Doron
authors.initials: D
authors.lastname: Azulay
authors.affiliation: Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel. milode@mail.huji.ac.il.
authors.forename: Oded
authors.initials: O
authors.lastname: Millo
authors.affiliation: WACKER-Lehrstuhl für Makromolekulare Chemie, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany. rieger@tum.de.
authors.forename: Bernhard
authors.initials: B
authors.lastname: Rieger