Hydrogen desorption effect on cathodoluminescence of ZnO |
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| Authors: | B. Dierre X.L. Yuan T. Ishigaki K. Ueda T. Sekiguchi |
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| Affiliation: | 1. L.N. Gumilyov Eurasian National University, Astana, Kazakhstan;2. Institute of Solid State Physics, University of Latvia, Riga, Latvia |
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| Abstract: | 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 H2 desorption is found by TPD for both faces. These data suggest that the decrease of the UV intensity is related to H desorption. |
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