Photoluminescence of Eu{sup 3+} ion doped phosphate ceramics
- Gilbert C. Robinson Department of Ceramic and Materials Engineering, Clemson University, Clemson, South Carolina 29634-0907 (United States)
- Battelle Pacific Northwest National Laboratory, Post Office Box 999, Richland, Washington 99352 (United States)
Phosphate ceramics doped with Eu{sup 3+} ions were synthesized through sol-gel process. The fluorescence spectra of Eu{sup 3+} as a function of firing temperature, dopant concentration, composition, and structure of the matrices were investigated. The gels synthesized by the reaction of P{sub 2}O{sub 5} with tetraethoxy silane or titanium tetraethoxide (Ti(OEt){sub 4}) and EuCl{sub 3}{center_dot}6H{sub 2}O as the dopant were fired in air from the temperature range 200{endash}900{degree}C to form P{endash}Si or P{endash}Ti crystalline phases. The crystal structure was examined by powder x-ray diffractometry. Si{sub 5}O(PO{sub 4}){sub 6} was the only crystalline phase for the P{endash}Si system. The amount of doping Eu{sup 3+} varied from 1 up to 10 at{percent}, and no obvious concentration quenching was observed in the concentration range. It was found that the phosphosilicates gave stronger fluorescence emission than the phosphotitanates. For both systems, the intensity of Eu{sup 3+} emission increased with higher firing temperatures. For the P{endash}Si system, the emission intensity increased with greater amounts of phosphorus, while the emission intensity did not change with the variation of composition in the P{endash}Ti system. {copyright} {ital 1998 American Institute of Physics.}
- OSTI ID:
- 573948
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 4 Vol. 83; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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