title: The quantum confined Stark effect in silicon nanocrystals.
abstract: The quantum confined Stark effect (QCSE) in Si nanocrystals embedded in a SiO(2) matrix is demonstrated by photoluminescence (PL) spectroscopy at room and cryogenic temperatures. It is shown that the PL peak position shifts to higher wavelengths with increasing applied electric field, which is expected from carrier polarization within the quantum dots. It is observed that the effect is more pronounced at lower temperatures due to the improved carrier localization at the lowest energy states of the quantum dots. Experimental results are shown to be in good agreement with phenomenological model developed for the QCSE model.
authors.affiliation: Department of Physics, Middle East Technical University, 06531 Ankara, Turkey.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Kulakci
authors.forename: Ugur
authors.initials: U
authors.lastname: Serincan
authors.forename: Rasit
authors.initials: R
authors.lastname: Turan
authors.forename: Terje G
authors.initials: TG
authors.lastname: Finstad