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Er3+/Yb3+ codoped Gd2O3 nano-phosphor for optical thermometry

โœ Scribed by Sunil Kumar Singh; Kaushal Kumar; S.B. Rai

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
390 KB
Volume
149
Category
Article
ISSN
0924-4247

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โœฆ Synopsis

Combustion synthesized Gd 2 O 3 : Er 3+ /Yb 3+ nanocrystalline phosphor has been developed and used as a temperature sensor. Frequency upconverted emissions from two thermally coupled excited states 2 H 11/2 and 4 S 3/2 of Er 3+ centered at 523 and 548 nm in the phosphor pumped by NIR source were recorded in the temperature range 300-900 K. The maximum sensitivity derived from the FIR technique of the green upconversion emission is approximately 0.0039 K -1 . The results imply that Er 3+ /Yb 3+ codoped Gd 2 O 3 phosphor can play an important role in high temperature measurements with a better sensitivity.

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