Type

Journal Article

Authors

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

Subjects

Physics

Topics
materials spectrum analysis surface exciton data transmission x ray photoelectron spectroscopy x ray diffraction nanotechnology semiconductors

Microscopic origins of the surface exciton photoluminescence peak in ZnO nanostructures (2011)

Abstract We report photoluminescence (PL) studies of the surface exciton peak in ZnO nanostructures at ∼3.367 eV aimed at elucidation of the nature and origin of the emission and its relationship to the nanostructure morphology. PL spectra in conjunction with localized voltage application in high vacuum and different gas atmospheres show a consistent variation (and recovery), allowing an association of the PL to a bound excitonic transition at the ZnO surface, which is modified by an adsorbate. PL studies of samples treated by plasma and of samples exposed to UV light under high vacuum conditions, both well-known processes for desorption of surface adsorbed oxygen, show no consistent effects on the surface exciton peak indicating the lack of involvement of oxygen species. X-ray photoelectron spectroscopy data strongly suggest involvement of adsorbed OH species. X-ray diffraction, scanning, and transmission electronmicroscopy data are presented also, and the relationship of the surface exciton peak to the nanostructure morphology is discussed.
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: 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 = Physical Sciences: Semiconductors
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, Kumar Kumarappan, 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