Publication: Optical Temperature Sensor Capabilities of the Green Upconverted Luminescence of Er3+ in La3NbO7 Ceramic Powders
Loading...
Identifiers
Publication date
2022-04
Defense date
Advisors
Tutors
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI AG
Impact
Export
Abstract
We present a study of the Er3+ upconverted luminescence in erbium doped Lanthanum
Niobium Oxide, La3NbO7, ceramic powder, prepared by solid state reaction. This study focuses
on the analysis of the feasibility of this system as a temperature sensor. Efficient UC luminescence
was observed under the 975 nm excitation showing intense green, red and NIR (850 nm) emission
bands. The NIR luminescence centred at about 850 nm and lying on the first biological window is
mainly insensitive to the temperature. In contrast, the upconverted green bands, associated with
the (2H11/2,4S3/2) !4I15/2 transitions, showed a high sensibility to temperature. Their temperature
dependence was studied from RT up to 525 K, paying special attention to the physiological range of
temperature (303–318 K). The high thermal sensitivities obtained, in comparison with other Er3+ and
Er3+-Yb3+ based optical temperature sensors in such ranges, suggest the potential application of this
phosphor in thermal sensing, suitable for both biological systems and other industrial applications
requiring higher temperatures.
Description
Keywords
Fluorescence intensity ratio, Optical temperature sensor, Er3+, Up-conversion luminescence, Sensitivity
Bibliographic citation
Hernández-Rodríguez, M. A., Egaña, A., Rodríguez-Mendoza, U. R., Lavín, V., & Muñoz-Santiuste, J. E. (2022). Optical Temperature Sensor Capabilities of the Green Upconverted Luminescence of Er3+ in La3NbO7 Ceramic Powders. In Crystals. 12(4). 455-465.