UV excited SrAl2O4:Tb3+ nanophosphors for photonic applications

UV excited SrAl2O4:Tb3+ nanophosphors for photonic applications

A series of Sr(1-x)Al2O4:xTb3+ (SAOTx; 0 ≤ x ≤ 10.0 mol%) nanophosphors were prepared by solid state reaction technique for various photonic applications. The sintering temperature was estimated to be 1050 °C to crystallize SAOT phosphors into monoclinic structure. The powder X-ray diffraction profi...

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Veröffentlicht in:Materials science in semiconductor processing 2020-01, Vol.105, p.104722, Article 104722
Hauptverfasser: Jamalaiah, B.C., Venkatramaiah, N., Rao, T. Srinivasa, Rasool, Sk Nayab, Rao, B. Narasimha, Ram, D.V. Raghu, Narayana Reddy, A. Surya
Format: Artikel
Sprache:eng
Schlagworte:
Green luminescence
Nanophosphors
Photonic applications
Solid state method
Surface coating
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Zusammenfassung:A series of Sr(1-x)Al2O4:xTb3+ (SAOTx; 0 ≤ x ≤ 10.0 mol%) nanophosphors were prepared by solid state reaction technique for various photonic applications. The sintering temperature was estimated to be 1050 °C to crystallize SAOT phosphors into monoclinic structure. The powder X-ray diffraction profiles were well consistent with JCPDS No. 34–0379. Upon 375 nm excitation, the SAOT phosphors displayed two groups of emission bands corresponding to 5D3 → 7FJ and 5D4 → 7FJ transitions. A quenching in luminescence was noticed beyond 5.0 mol% of Tb3+ concentration due to the transfer of energy at higher concentrations. The emission spectra of SAOTx phosphors showed an intense green luminescence through 5D4 → 7F5 (546 nm) transition. The colour purity of SAOTx phosphors was analyzed by evaluating the chromaticity coordinates. The SAOT5 phosphor could be the best choice for various photonic applications.
ISSN:1369-8001
1873-4081
DOI:10.1016/j.mssp.2019.104722