Red light intensity modulation, temperature sensing and bioimaging of NaLuF4:Er3+/Tm3+/Yb3+ microcrystals under 1532 nm laser excitation

Zhou, Wei; Yang, Jian; Jin, Xiangliang

doi:10.1016/j.jallcom.2024.173534

Cited by 5 publications

(1 citation statement)

References 35 publications

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“…Based on previous reports, two crucial parameters, absolute sensitivity ( S a ) and relative sensitivity ( S r ), are typically employed to precisely evaluate the thermal sensitivity characteristics across various thermometers, which can be determined using the following expression , S a = | d LIR italicdT | = a 0.25em exp ( − b T ) × b T 2 S r = | 1 LIR d LIR dT | = b T 2 The S r values calculated via eq are illustrated in Figure c. These models result in S r values of 1.30% K –1 ( I 655 / I 545 ) and 1.12% K –1 ( I 545 / I 525 ) at 313 K. It is noteworthy that the maximum S r values obtained exceed those recently reported for luminescent thermometers based on Er 3+ doping materials. − Furthermore, temperature resolution (δ T ) is a vital parameter for luminescent thermometers, which is defined as δ T = 1 S normalr δ LIR LIR where δLIR/LIR signifies the relative uncertainty of thermometric parameter readings. Based on the standard deviation, the δLIR/LIR values are determined to be 0.5% .…”

Section: Resultsmentioning

confidence: 99%

Engineering Visible to Near-Infrared Luminescence through a Selective Doping Strategy for High-Performance Temperature Sensing

Dai,

Li,

et al. 2024

Inorg. Chem.

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Luminescence nanothermometers have garnered considerable attention due to their noncontact measurement, high spatial resolution, and rapid response. However, many nanothermometers employing single-mode measurement encounter challenges regarding their relative sensitivity. Herein, a unique class of tunable upconversion (UC) and downshifting (DS) luminescence covering the visible to nearinfrared range (400−1700 nm) is reported, characterized by the superior Tm 3+ , Ho 3+ , and Er 3+ emissions induced by efficient energy transfer. The outstanding negative thermal expansion characteristic of ScF 3 nanocrystals has been found to guide excitation energy toward the relevant emitting states in the Yb 3+ −Ho 3+ −Tm 3+ -codoped system, consequently resulting in remarkable near-infrared III (NIR-III) luminescence at ∼1625 nm (Tm 3+ : 3 F 4 → 3 H 6 transition), which in turn presents numerous opportunities for designing multimode ratiometric luminescence thermometry. Furthermore, by facilitating phonon-assisted energy transfer in Er 3+ −Ho 3+ -codoped systems, the luminescence intensity ratio (LIR) of 4 I 13/2 of Er 3+ and 5 I 6 of Ho 3+ in ScF 3 :Yb 3+ /Ho 3+ /Er 3+ exhibits a strong temperature dependence, enabling NIR-II/III luminescence thermometry with superior thermal sensitivity and resolution (S r = 0.78% K −1 , δT = 0.64 K). These findings not only underscore the distinctive and ubiquitous attributes of lanthanide ion-doped nanomaterials but also hold significant implications for crafting luminescence thermometers with unparalleled sensitivity.

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