Synthesis and spectroscopic characterization of YPO{sub 4} activated with Tb{sup 3+} and effect of Bi{sup 3+} co-doping on the luminescence properties
- Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica, Universita di Parma, Parma (Italy)
Single crystals of YPO{sub 4}:Tb{sup 3+}(1%) have been grown from Pb{sub 2}P{sub 2}O{sub 7} flux and their emission dynamics have been characterized by steady state and time resolved optical spectroscopy. The investigation has then been extended to green emitting phosphors with composition Y{sub 0.95-x}Tb{sub 0.05}Bi{sub x}PO{sub 4} (x=0, 0.0025, 0.005, 0.01, 0.025), synthesized by the Pechini sol-gel method and by solid state reaction. The former procedure has yielded higher quality materials in terms of size and morphology of the particles and of emission performance. The effect of the Bi{sup 3+} co-doping on the emission properties has been related to the Bi{sup 3+}{yields}Tb{sup 3+} energy transfer process as well as to the influence of the bismuth ions on the optical properties of the host lattice. - Graphical abstract: The intensity of the 370 nm excited luminescence increases with the Bi{sup 3+} content. A possible mechanism accounting for this behavior is proposed and discussed. Highlights: Black-Right-Pointing-Pointer Green emitting YPO{sub 4}:Tb{sup 3+} phosphors were synthesized by different methods. Black-Right-Pointing-Pointer The emission dynamics have been investigated under different experimental conditions. Black-Right-Pointing-Pointer The co-doping with Bi{sup 3+} ions increases the emission performance of the phosphors.
- OSTI ID:
- 22131134
- Journal Information:
- Journal of Solid State Chemistry, Vol. 192; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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