@Article{CL.2023.207.439,
AUTHOR = {Z. Liu, R. X. Wang, K. W. Sun, X. C. Ling, J. W. Sun, D. H. Chen},
TITLE = {Upconversion red light emission and luminescence thermometry of Gd<sub>2</sub>O<sub>3</sub>:Er<sup>3+</sup> @Gd<sub>2</sub>O<sub>3</sub>:Yb<sup>3+</sup> core-shell nanofibers synthesized via electrospinning},
JOURNAL = {Chalcogenide Letters},
VOLUME = {20},
YEAR = {2023},
NUMBER = {7},
PAGES = {439--447},
URL = {http://www.techscience.com/CL/v20n7/65252},
ISSN = {1584-8663},
ABSTRACT = {Gd<sub>2</sub>O<sub>3</sub>:Er<sup>3+</sup> @Gd<sub>2</sub>O<sub>3</sub>:Yb<sup>3+</sup> core-shell nanofibers with cubic phase were successfully 
fabricated by electrospinning method. The structural, morphological properties were 
investigated by X-Ray diffraction, scanning electron microscopy. Under 980 nm excitation, 
the upconversion photoluminescence in visible light exhibits strong red emitting band with 
obvious splitting peaks resulted from stark splitting of energy level. The visible emissions 
are sensitive to temperature in the range of 303-543 K. The red emission displays 
quenching with elevation of temperature. The activation energy for thermal quenching is 
equal to 0.1408 eV. The temperature dependent multi-peaks of red emission were 
systematically investigated. Based on valley and peak ratio of I<sub>680.31nm</sub>/ I<sub>683.03nm</sub> in 
upconversion emission spectra, temperature sensing with constant absolute sensitivity was 
achieved. These results suggest Gd<sub>2</sub>O<sub>3</sub>:Er<sup>3+</sup> @Gd<sub>2</sub>O<sub>3</sub>:Yb<sup>3+</sup> nanofibers are promising 
candidates for luminescence thermometry, which may provide their application values in 
both scientific research and industry. },
DOI = {10.15251/CL.2023.207.439}
}