| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1232793 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2012 | 6 Pages |
CaSiO3:Dy3+ (1–5 mol%) nanophosphors have been prepared by a low temperature solution combustion method. The structural and luminescence (ionoluminescence; IL and photoluminescence; PL) studies have been carried out for pristine and ion irradiated samples. The XRD patterns of pristine sample show a prominent peak at (3 2 0) for the monoclinic structure of β-CaSiO3. Upon ion irradiation, the intensity of the prominent peak is decreased at the fluence of 7.81 × 1012 ions cm−2 and at higher fluence of 15.62 × 1012 ions cm−2, the prominent peak completely vanishes. The decrease in peak intensity might be due to the stress induced point defects. On-line IL and in situ PL studies have been carried out on pelletized samples bombarded with 100 MeV Si7+ ions with fluences in the range (7.81–15.62) × 1012 ions cm−2. The characteristic emission peaks at 481,574, 664 and 754 nm recorded in both IL and PL are attributed to the luminescence centers activated by Dy3+ ions. It is found that IL and PL emissions intensity decreases with increase in Si7+ ion fluence. The decrease in intensity can be due to the destruction of SiOSi and OSiO type species present on the surface of the sample. FTIR studies also confirm the SiOSi and OSiO type species observed to be sensitive for swift heavy ion (SHI) irradiated samples.
Graphical abstractPL spectrum of (A) β-CaSiO3 bombarded with 100 MeV Si7+ ions in the fluence range 1 × 1013 ions cm−2; (B) β-CaSiO3:Dy3+ bombarded with 100 MeV Si7+ ions in the fluence range (7.81–15.62) × 1012 ions cm−2.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► CaSiO3:Dy3+ nanoparticles were prepared by solution combustion method. ► Influence of 100 MeV Si7+ ion influence on IL and PL properties was reported. ► The SiOSi and OSiO species observed to be sensitive for SHI irradiated samples.
