학술논문
Dual-mode optical thermometry based on intervalence charge transfer excitations in Tb3+/Pr3+ co-doped CaNb2O6 phosphors.
Document Type
Article
Author
Source
Subject
*CHARGE transfer
*OPTICAL measurements
*THERMOMETRY
*DOPING agents (Chemistry)
*LUMINESCENCE
*PHOSPHORS
*LUMINESCENCE measurement
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Language
ISSN
0272-8842
Abstract
Self-calibrated temperature measurements combined with luminescence intensity ratio (LIR) and luminescence lifetime are more accurate. A dual-mode self-calibration optical thermometer was designed based on CaNb 2 O 6 : Tb3+/Pr3+ phosphor. The obtained sample has excellent sensitivity, with the maximum values of absolute sensitivity (S a) and relative sensitivity (S r) being 0.69 K-1 at 612 K and 2.50% K-1 at 532 K for LIR mode, and 0.0059 K-1 at 475 K and 2.62% K-1 at 535 K for luminescence lifetime mode, respectively. These results indicate that CaNb 2 O 6 : Tb3+/Pr3+ phosphor has valuable potential application for self-calibration optical temperature measurement. [Display omitted] • The CaNb 2 O 6 : Tb3+/Pr3+ phosphors were successfully prepared by high-temperature solid reaction. • A novel dual-mode optical thermometer was designed based on CaNb 2 O 6 : Tb3+/Pr3+ phosphors. • The maximum S a and S r were 0.69 K-1 and 2.50% K-1 for LIR mode, respectively. • The maximum S a and S r were 0.0059 K-1 and 2.62% K-1 for luminescence lifetime mode, respectively. [ABSTRACT FROM AUTHOR]