Defect-band-free luminescence from ZnO nanoparticles fabricated by ion implantation and thermal oxidation

✍ Scribed by H. Amekura; Y. Sakuma; M. Yoshitake; Y. Takeda; N. Kishimoto; Ch. Buchal

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 323 KB
• Volume: 257
• Category: Article
• ISSN: 0168-583X
• DOI: 10.1016/j.nimb.2006.12.151

✦ Synopsis

Defect-band-free luminescence is observed from ZnO nanoparticles fabricated by implantation of 60 keV Zn + ions in silica glass (SiO 2 ) to 1.0 • 10 17 ions/cm 2 and subsequent oxidation at 600 °C for 1 h. To clarify the mechanism, the samples were evaluated by optical absorption spectroscopy, grazing incidence X-ray diffraction (GIXRD), photoluminescence (PL) spectroscopy and sputter depth profiling using X-ray excited Auger electron spectroscopy (XAES). Based on these observations, we discuss the possible origins of defectband-free luminescence; i.e. the stoichiometric formation of ZnO nanoparticles due to the coexistence of metallic Zn nanoparticles, and the suppression of additional transformation of ZnO to Zn 2 SiO 4 phase at the low oxidation temperature of 600 °C.