Type

Journal Article

Authors

Enda McGlynn
Martin O. Henry
S. Newcomb
Greg Hughes
K. Kumar
H.K. Kim
Y.S. Jung
Mahua Biswas

Subjects

Chemistry

Topics
adsorption nanotechnology photonics photoluminescence spectrum analysis surface exciton materials nanostructure

Microscopic origins of the surface exciton photoluminescence in ZnO nanostructures (2012)

Abstract Photoluminescence (PL) studies of the surface exciton peak in ZnO nanostructures at ∼3.367 eV are reported to elucidate the nature and origin of the emission and its relationship to nanostructure morphology. Localised voltage application in high vacuum and different gas atmospheres show a consistent PL variation (and recovery), allowing an association of the PL to a bound excitonic transition at the ZnO surface modified by an adsorbate. Studies of samples treated by plasma and of samples exposed to UV light under high vacuum conditions show no consistent effects on the surface exciton peak indicating no involvement of oxygen species. X-ray photoelectron spectroscopy data indicate involvement of adsorbed OH species. The relationship of the surface exciton peak to the nanostructure morphology is discussed in light of x-ray diffraction, scanning and transmission electron microscopy data.
Collections Ireland -> Dublin City University -> Publication Type = Article
Ireland -> Dublin City University -> Status = Published
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Science and Health
Ireland -> Dublin City University -> Subject = Physical Sciences: Photonics
Ireland -> Dublin City University -> Subject = Physical Sciences: Spectrum analysis
Ireland -> Dublin City University -> Subject = Physical Sciences: Nanotechnology
Ireland -> Dublin City University -> Subject = Physical Sciences
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Science and Health: School of Physical Sciences
Ireland -> Dublin City University -> Subject = Engineering: Materials
Ireland -> Dublin City University -> Subject = Engineering
Ireland -> Dublin City University -> DCU Faculties and Centres = Research Initiatives and Centres
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools
Ireland -> Dublin City University -> DCU Faculties and Centres = Research Initiatives and Centres: National Centre for Plasma Science and Technology (NCPST)

Full list of authors on original publication

Enda McGlynn, Martin O. Henry, S. Newcomb, Greg Hughes, K. Kumar, H.K. Kim, Y.S. Jung, Mahua Biswas

Experts in our system

1
Enda McGlynn
Dublin City University
Total Publications: 80
 
2
Martin O. Henry
Dublin City University
Total Publications: 35
 
3
Greg Hughes
Dublin City University
Total Publications: 29