RT Journal Article
T1 Optical Temperature Sensor Capabilities of the Green Upconverted Luminescence of Er3+ in La3NbO7 Ceramic Powders
A1 Hernández Rodríguez, Miguel A.
A1 Egaña Gullón, Álvaro María de
A1 Rodríguez Mendoza, Ulises R.
A1 Lavín, Victor
A1 Muñoz Santiuste, Juan Enrique
AB We present a study of the Er3+ upconverted luminescence in erbium doped LanthanumNiobium Oxide, La3NbO7, ceramic powder, prepared by solid state reaction. This study focuseson the analysis of the feasibility of this system as a temperature sensor. Efficient UC luminescencewas observed under the 975 nm excitation showing intense green, red and NIR (850 nm) emissionbands. The NIR luminescence centred at about 850 nm and lying on the first biological window ismainly insensitive to the temperature. In contrast, the upconverted green bands, associated withthe (2H11/2,4S3/2) !4I15/2 transitions, showed a high sensibility to temperature. Their temperaturedependence was studied from RT up to 525 K, paying special attention to the physiological range oftemperature (303–318 K). The high thermal sensitivities obtained, in comparison with other Er3+ andEr3+-Yb3+ based optical temperature sensors in such ranges, suggest the potential application of thisphosphor in thermal sensing, suitable for both biological systems and other industrial applicationsrequiring higher temperatures.
PB MDPI AG
SN 2073-4352
YR 2022
FD 2022-04
LK https://hdl.handle.net/10016/35080
UL https://hdl.handle.net/10016/35080
LA eng
NO This research has been partially supported by the Spanish Ministerio de Ciencia, Innovacióny Universidades (MICINN) through the Spanish projects RTI2018-101020-B-100 and PID2019-106383GB-C44, by the Madrid Government (Comunidad de Madrid-Spain) under the MultiannualAgreement with UC3Min the line of Excellence of University Professors (EPUC3MXX) and in the contextof the V PRICIT (Regional Programme of Research and Technological Innovation) by the AgenciaCanaria de Investigación, Innovación y Sociedad de la Información (ACIISI) (ProID2017010078).M.A.H.-R. thanks MINECO for the FPI grant (BES-2014-068666). U.R.R.-M.thanks Gobierno de Canarias and EU-FEDER for grant ProID2020010067.
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