| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Optical Investigation of Sm3+ Doped Zinc-Lead-Phosphate Glass |
| Raja J. Amjad1,2**, M. R. Sahar1, S. K. Ghoshal1, M. R. Dousti1, S. Riaz2, B. A. Tahir1 |
1Advanced Optical Material Research Group, Faculty of Science, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
2Centre for Solid State Physics, University of the Punjab, QAC, Lahore-54590, Pakistan |
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Abstract Samarium doped lead-zinc-phosphate glasses having composition (60?x)P2O5-20PbO-20ZnO-xSm2O3 where x=0, 0.5, 1.0, 3.0mol% were prepared by using the melt quenching technique. The Archimedes method was used to measure their densities, which are used to calculate the molar volumes. The values of densities lie in the range 3.698–4.090 gm/cm3 whereas those of molar volume lie in the range of 37.24–40.00 cm?3. UV-vis-NIR absorption spectroscopy in the wavelength range 200–2000 nm was carried out. Absorption spectra consist of seven absorption peaks corresponding to the transitions from the 6H5/2 ground state to various excited energy levels. The energy band gap measured from the optical absorbance is found to be in the range of 3.88–4.43 eV and 3.68–4.33 eV for direct and indirect transitions, respectively. In addition, the photoluminescence spectrum shows four prominent emission bands centered at 560, 597, 642 and 700 nm corresponding to the 4G5/2–6HJ (J=5/2, 7/2, 9/2, 11/2) transitions respectively and the intensity of all the bands are enhanced as the concentration of Sm3+ ions increases.
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Received: 04 May 2012
Published: 31 July 2012
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| PACS: |
73.43.Fj
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(Novel experimental methods; measurements)
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73.61.Jc
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(Amorphous semiconductors; glasses)
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76.30.Kg
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(Rare-earth ions and impurities)
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42.70.Jk
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(Polymers and organics)
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