Luminescence properties of defects in P⁺- or B⁺-implanted thermally grown silicon dioxide

The photoluminescence (PL) spectra from P⁺- or B⁺-implanted thermally grown film obtained by synchrotron radiation and excimer laser are studied and the nature of the defects induced by the ion implantation is discussed. Results show that under the excitation of KrF excimer laser, three PL bands at 4.3 eV, 2.7 eV, and 1.9 eV are observed. As for the PL bands at 4.3 eV and 1.9 eV, the intensity increases with a decrease in the temperature, while it decreases for the PL at 2.7 eV. From the similarities of the temperature dependence and the decay profile between the present ion-implanted SiO₂ film and the well-identified bulk silica glass, the two PL bands at 4.3 eV and 2.7 eV are attributable to the oxygen vacancy, while the PL at 1.9 eV is from NBOHC.