RT info:eu-repo/semantics/article
T1 A novel optical thermometry strategy based on upconversion emission of Tm3+/Yb3+ codoped Na3GdV2O8 phosphors
A1 Soler Carracedo, Kevin
A1 Saidi, Kamel
A1 Dammak, Mohamed
A1 Martín Benenzuela, Inocencio Rafael
A2 Física
AB In the last few years, huge progress has been devoted to the development of remote opticalthermometry, due to their non-contact, high-sensitivity and fast measurement characteristics,which is especially important for various industrial and bio-applications. For these purposes,lanthanide-doped particles seem to be the most promising luminescence thermometers. In thisstudy, Na3GdV2O8 (NGVO): Tm3+/Yb3+ phosphors are prepared by sol gel method. Under 980nm excitation, the upconversion emission spectra are composed of two visible emission bandsarising from the Tm3+ transitions 1G4→ 3H6 (475 nm), 1G4→ 3F4 (651 nm), a strong emissionat 800 nm (3H4→ 3H6) in the first biological window and an emission in the third biologicalwindow at 1625 nm (3F4 → 3H6). Accordingly, the luminescence intensity ratio (LIR)between the Tm3+ LIR1(3H4/1G4) and LIR2 (3F4/1G4)) transitions demonstrates excellentrelative sensing sensitivity values (4.2 % K−1– 2% K−1) and low-temperature uncertainties(0.4 K–0.5 K) over a wide temperature sensing range of 300 K to 565 K, which areremarkably better than those of many other luminescence thermometers. The NGVO: Tm3+,Yb3+ exhibit a stronger NIR emission at low excitation density that has potential uses in deeptissue imaging, optical signal amplification and other fields. The results indicate Tm3+/Yb3+:NGVO is an ideal candidate for optical thermometer and particular for biological applications.
YR 2021
FD 2021
LK http://riull.ull.es/xmlui/handle/915/34557
UL http://riull.ull.es/xmlui/handle/915/34557
LA en
NO PID2019-106383GB-C44
DS Repositorio institucional de la Universidad de La Laguna
RD 09-may-2024