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Enhancing defect-related photoluminescence by hot implantation into SiO2 layers

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7 Author(s)
Im, S. ; Department of Metallurgical Engineering, School of Materials Science and Engineering, Yonsei University, Seoul, 120-749, Korea ; Jeong, J.Y. ; Oh, M.S. ; Kim, H.B.
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Visible photoluminescence around an orange band of 580 nm wavelength are observed from 300 nm thin SiO2 layers implanted by Si or Ge ions at both substrate temperatures of 25 °C [room temperature (RT)] and 400 °C (hot). Si implantations at an energy of 30 keV were performed with doses of 5×1015, 3×1016, and 1×1017cm-2 while Ge implantations were done at 100 keV with a dose of 5×1015cm-2. Samples implanted at 400 °C always show much higher intensities of luminescence than those implanted at room temperature. Electron spin resonance signals of the hot-implanted samples indicate relatively smaller amounts of nonradiative defects than those of RT-implanted samples. It is concluded that the hot-implantation effectively enhances the intensity of defect-related photoluminescence by reducing the density of the nonradiative defects and introducing the radiative defects, which contribute to the luminescence in SiO2 layers. © 1999 American Institute of Physics.

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Applied Physics Letters  (Volume:74 ,  Issue: 7 )