Assessing of photoluminescence and structural properties of Dy+3 doped cadmium tantalate phosphor

Abstract

According to the charge balance, trivalent dysprosium doped Cdx-1Ta2O6:xDy3+ (x=0.5, 1, 2, 3, 5) phosphor series was fabricated by solid state reaction route at 1100 C for 8 h. The synthesized phosphors were investigated by XRD (X-ray diffraction), SEM (scanning electron microscopy), and PL (photoluminescence) analyses. XRD and SEM analyzes revealed the orthorhombic colombite crystal structure and the presence of oval-like and shapeless morphology with submicron and several micron grain sizes, respectively. With the excitation of 387.8 nm, the phosphors exhibited blue and yellow emissions at 482.4 nm and 578.5 nm depending on the 4F9/2→6H15/2 and 4F9/2→6H13/2 transitions of Dy3+, respectively. The concentration quenching did not occur because the improvement in the charge balance reduced the structural defects and decreased the conversion of excitation energy to non-radiative transitions. The emission intensity of cadmium tantalate phosphor increased with increasing Dy3+ ion concentration up to x=5 value, and did not occurred the concentration quenching which reduces emission intensity. The Commission Internationale d’Eclairage (CIE) coordinates of Cdx-1Ta2O6:xDy3+ (x=0.5, 1, 2, 3, 5) phosphors were found near the white region in the chromaticity diagram

Keywords

• Photoluminescence
• XRD
• SEM
• W-LEDs

References

1. Referans1 European Coordination Committee of the Radiological, Electromedical and Healthcare IT Industry, COCIR application for new exemption Page 1-12, Blvd A. Reyers 80 1020 Brussels, 2011.
2. Referans2 V.L. Colvin, M.C. Schlamp, A.P. Alivisatos, Nature 370 (1994) 354–357.
3. Referans3 L.E. Chaar, L.A. Lamont, N.E. Zein, Renewable and Sustainable Energy Reviews 15 (2011) 2165–75.
4. Referans A4.I. Iorgu, D. Berger, L. Alexandrescu, B.S. Vasıle, C. Mateı, Chalcogenide Letters 10 (2013) 525 – 531.
5. Referans 5 I. Willner, R. Baron, B.Willner, Biosens. Bioelectron. 22 (2007) 1841.
6. Referans 6 Y.J. Choi, Y.J. Kim, J.W. Lee, Y. Lee, Y.B. Lim, H.W. Chung, Journal of Nanoscience and Nanotechnology 12 (2012)2160–216
7. Referans7 Y. Su, Y. He, H. Lu, L. Sai, Q. Li, W. Li, L. Wang, P. Shen, Q. Huang, C. Fan, Biomaterials 30 (2009) 19–25
8. Referans 8 M. İlhan, M. K. Ekmekçi, Synthesis and photoluminescence properties of Dy3+ doped white light emitting CdTa2O6 phosphors, J. Solid State Chem. 226 (2015) 243–249

9. Referans 9 M. İlhan, Int. J. Appl. Ceram. Technol. 14 (2017) 1134–1143.
10. Referans 10 M.K. Ekmekçi, M. İlhan, L.F. Güleryüz, A. Mergen, Study on molten salt synthesis, microstructural determination and white light emitting properties of CoNb2O6:Dy3+ phosphor, Optik 128 (2017) 26–33.
11. Referans 11 R. Erdem, M. İlhan, M.K. Ekmekçi, Ö. Erdem, Electrospinning, preparation and photoluminescence properties of CoNb2O6:Dy3+ incorporated polyamide 6 composite fibers, Appl. Surf. Sci. 421 (2017) 240–246.
12. Referans 12 M. İlhan, M. Ekmekçi, A. Mergen, C. Yaman, Photoluminescence characterization and heat treatment effect on luminescence behavior of BaTa2O6:Dy3+ phosphor, Int. J. Appl. Ceram. Technol. 14 (2017) 1134–1143.
13. Referans 13 M. İlhan, İ.Ç. Keskin, Analysis of Judd–Ofelt parameters and radioluminescence results of SrNb2O6:Dy3+ phosphors synthesized via molten salt methodPhys. Chem. Chem. Phys. 22 (2020) 19769–19778.
14. Referans 14 M. İlhan, İ.K. Keskin, S. Gültekin, Assessing of photoluminescence and thermoluminescence properties of Dy3+ doped white light emitter TTB-lead metatantalate phosphor, J. Electron. Mater. 49 (2020) 2436–2449.
15. Referans 15 M. İlhan, İ.Ç. Keskin, Photoluminescence, radioluminescence and thermoluminescence properties of Eu3+ doped cadmium tantalate phosphor, Dalton Trans. 47 (2018) 13939–13948.
16. Referans 16 İ. Aritman, S. Yildirim, A Kisa, L.F. Guleryuz, M Yurddaskal, T. Dikici, E. Celik, Synthesis and characterization of Gd2O2SO4:Pr3+ scintillation material produced by sol–gel process for digital imaging system, Acta Phys. Pol. A 131 (2017) 106-108.
17. Referans 17 M. Vukovic, L. Mancic, I. Dinic, P. Vulic, M. Nikolic, Z. Tan, O. Milosevic, The gadolinium effect on crystallization behavior and luminescence of β‐NaYF4:Yb,Er phase, Int. J. Appl. Ceram. Technol. 17 (2020) 1445–1452.
18. Referans 18 R.S. Naorem, N.P. Singh, N.M. Singh, Photoluminescence studies of Ce3+ ion-doped BiPO4 phosphor and its photocatalytic activity, Int. J. Appl. Ceram. Technol. 17 (2020) 2744–2751.
19. Referans 19 H. Yang, X. Liu, Z. Zhou, L. Guo, Preparation of a novel Cd2Ta2O7 photocatalyst and its photocatalytic activity in water splittingCatal. Commun. 31 (2013) 71–75.
20. Referans 20 F. Haessner, G. Petzow, E. Preisler, Eignung von cadmiumtantalat als kontrollmaterial für hochtemperaturreaktoren, J. Nucl. Mater. 7 (1962) 46–57
21. Referans 21 G. Blasse, Energy transfer between inequivalent Eu2+ ions, J. Solid State Chem. 62 (1986) 207–211
22. Referans 22 G. Blasse, Energy transfer in oxidic phosphors, Philips Res. Rep. 24 (1969) 131.
23. Referans 23 C.S. McCamy, Correlated color temperature as an explicit function of chromaticity coordinates, Color Res. Appl. 17 (1992) 142–144.