Hydrogen desorption effect on cathodoluminescence of ZnO

The effects of the low-energy electron beam on ZnO single crystals were investigated by cathodoluminescence (CL), Time-of-Flight Electron Stimulated Desorption (TOF-ESD) and Temperature Programmed Desorption (TPD). Under e-beam irradiation, the ultraviolet (UV) emission decreases exponentially for O...

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Bibliographic Details
Published inSuperlattices and microstructures Vol. 45; no. 4; pp. 321 - 325
Main Authors Dierre, B., Yuan, X.L., Ishigaki, T., Ueda, K., Sekiguchi, T.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.04.2009
Subjects
Electron beam
Electron-stimulated desorption
Hydrogen
Luminescence
ZnO
Electron beam
Electron-stimulated desorption
ZnO
Hydrogen
Luminescence
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Summary:The effects of the low-energy electron beam on ZnO single crystals were investigated by cathodoluminescence (CL), Time-of-Flight Electron Stimulated Desorption (TOF-ESD) and Temperature Programmed Desorption (TPD). Under e-beam irradiation, the ultraviolet (UV) emission decreases exponentially for O-face, while it increases and then decreases for Zn-face. Meanwhile, a large desorption of H + is observed by TOF-ESD for both O- and Zn-faces. On the other hand, an increase of H in the irradiated volume is observed after stopping the e-beam irradiation. Similar H 2 desorption is found by TPD for both faces. These data suggest that the decrease of the UV intensity is related to H desorption.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0749-6036
1096-3677
DOI:10.1016/j.spmi.2008.12.015