Fracto‐mechanoluminescence and thermoluminescence properties of UV and γ‐irradiated Ca2Al2SiO7:Ce3+ phosphor |
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Authors: | Geetanjali Tiwari Nameeta Brahme R Sharma D P Bisen Sanjay Kumar Sao Manisha Singh |
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Institution: | 1. School of Studies in Physics and Astrophysics, Pt. Ravishankar Shukla University Raipur, Chhattisgarh, India;2. Department of Physics, Arts and Commerce Girls College, Devendra Nagar, Raipur, Chhattisgarh, India;3. Department of Physics, Amity University, Gwalior (M.P.) |
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Abstract: | Ce3+‐doped calcium aluminosilicate phosphor was prepared by a combustion‐assisted method at an initiating temperature of 600°C. Structural characterization was carried out using X‐ray diffraction (XRD) and scanning electron microscopy (SEM). The absorption spectra of Ca2Al2SiO7:Ce3+ showed an absorption edge at 230 nm. The optical characterization of Ca2Al2SiO7:Ce3+ phosphor was investigated in a fracto‐mechanoluminescence (FML) and thermoluminescence (TL) study. The peak of ML intensity increased as the height of impact of the moving piston increased. The TL intensity of Ca2Al2SiO7:Ce3+ was recorded for different exposure times of UV and γ‐irradiation and it was observed that TL intensity was maximum for a UV irradiation time of 30 min and for a γ‐dose of 1180 Gy. The TL intensity had three peaks for UV irradiation at temperatures 82°C, 125°C and 203°C. Also the TL intensity had a single peak at 152°C for γ‐irradiation. The TL and ML emission spectra of Ca2Al2SiO7:Ce3+ phosphor showed maximum emission at 400 nm. The possible mechanisms involved in the TL and ML processes of the Ca2Al2SiO7:Ce3+ phosphor are also explained. Copyright © 2015 John Wiley & Sons, Ltd. |
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Keywords: | silicate materials thermoluminescence mechanoluminescence |
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