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Energy-migration mediated ratiometric upconversion luminescence nanothermometer: Erbium sublattice vs. ytterbium
Rui Liu1, Yao Cheng2, Hang Lin3
1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Fuzhou, Fujian 350002, PR China; College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, PR China.
Abstract:
Accurate lanthanides featured with the abundant ladder-like excited states may enable one single activator to exhibit a multitude of emission bands. The elaborate manipulation on such emission bands can realize the modulation of emission color and therefore lead to plenty of applications. The modification of up-conversion dynamics via energy migration within nanostructure can lead to temperature-dependent colormetric lanthanide up-conversion emissions and has been proposed to design high-performance luminescence nanothermometers. By comparing the up-conversion luminescence thermal behaviors of NaYbF4:Er3+ and NaErF4 nanocrystals, in this work, we demonstrate that a delicate design for the energy migration path within nanocrystal can significantly contribute to the luminescence thermometric performance.
