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Synthesis and photoresponse of rare earth doped phosphosilicates

Published online by Cambridge University Press:  10 February 2011

Z. Cao ,
B. I. Lee ,
W. D. Samuels ,
G. J. Exarhos  and
L. Wang
Z. Cao
Affiliation:
Gilbert C. Robinson Department of Ceramic and Materials Engineering, Clemson University, Clemson, South Carolina 29634–0907
B. I. Lee
Affiliation:
Gilbert C. Robinson Department of Ceramic and Materials Engineering, Clemson University, Clemson, South Carolina 29634–0907
W. D. Samuels
Affiliation:
Battelle Pacific Northwest National Laboratory, Richland, Washington 99352
G. J. Exarhos
Affiliation:
Battelle Pacific Northwest National Laboratory, Richland, Washington 99352
L. Wang
Affiliation:
Battelle Pacific Northwest National Laboratory, Richland, Washington 99352
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Abstract

Phosphate ceramics doped with Sm3+ and Tb3+ ions were synthesized through sol-gel process. Thin films of Tb3+ doped phosphosilicates were fabricated by spin coating of the phosphosilicate sols on SiOx/indium-tin-oxide/glass substrates. The gels synthesized by reaction of P2O5 with tetraethoxy silane (TEOS) were fired in air at a temperature range of 200°C – 900°C. The crystal structure was examined by x-ray diffractometry. Si5O(PO4)6 was the only crystalline phase. The fluorescence spectra of Sm3+ as a function of firing temperature, composition and structure of the matrices were investigated. The intensity of Sm3+ emission increased with increasing firing temperatures and greater proportion of phosphorus. The photocurrent of the films at 355 nm laser excitation was observed. The photoresponse as a function of laser energy was linear and showed no sign of saturation. The films exhibited stable photoresponse under a high number of laser shots.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 495: Symposium W – Chemical Aspects of Electronic Ceramics Processing , 1997 , 215
Copyright
Copyright © Materials Research Society 1998

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References

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