title: Observation of the first excited state of A-exciton in ZnO nanocombs.
abstract: High-quality ZnO nanocombs were synthesized on Si substrates coated with Au films by evaporating ZnO powders with a high yield. The morphology of the ZnO nanocombs was characterized by scanning electronic microscopy. In order to study the dynamic process of near-band edge emission, the temperature-dependent photoluminescence spectra were measured. The first excited state emission of A-free exciton centered at 3.403 eV was observed at 87 K.
authors.affiliation: Heilongjiang Key Laboratory for Advanced Functional Materials and Excited State Processes, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China.
authors.forename: Zeming
authors.initials: Z
authors.lastname: Li
authors.forename: Hong
authors.initials: H
authors.lastname: Gao
authors.forename: Lili
authors.initials: L
authors.lastname: Wu
authors.forename: Xitian
authors.initials: X
authors.lastname: Zhang