کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5436431 | 1509552 | 2017 | 11 صفحه PDF | دانلود رایگان |
The present paper reports on the swift heavy ion (SHI) induced modifications in the structural, optical and luminescence properties of Dy3+ doped CaMoO4 phosphors synthesized via hydrothermal route. The material is irradiated by 30Â MeV Li3+, 75Â MeVÂ C6+ and 100Â MeV Ag7+ ions in the fluence range varying from 1Â ÃÂ 1011 to 1Â ÃÂ 1013 ion/cm2. The ion induced modified properties were investigated by using X-ray diffractometer (XRD), Field Emission Scanning Electron microscopy (FESEM) with energy dispersive x-ray spectroscopy (EDS), X-Ray photoelectron spectroscopy (XPS), diffuse reflectance (DR) and photoluminescence (PL) spectroscopy. The XRD and the FESEM results confirm the loss of crystallinity and reduction of the particle size after SHI irradiations. The change in elemental behavior before and after SHI irradiation is described via EDS assisted elemental mapping and XPS spectroscopy. DR spectra exhibit a red shift in the absorption band, resulting in a decrease in the band gap after ion irradiation. The change in the intensity of the PL peaks without any change in the band positions was noticed after ion irradiation. The variation in structural and optical properties and colour characteristics with ion fluence is discussed in details on the basis of the variation of defect concentration, elemental behavior and the linear energy transfer with ion irradiation.
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Journal: Acta Materialia - Volume 124, 1 February 2017, Pages 109-119