Effect of Ca 2+ doping on the upconversion luminescence properties of NaYF 4 :Yb 3+ /Tm 3+ nanoparticles and study of its temperature measurement performance

Effect of Ca 2+ doping on the upconversion luminescence properties of NaYF 4 :Yb 3+ /Tm 3+ nanoparticles and study of its temperature measurement performance

A solvothermal method was used to prepare a series of Yb 3+ /Tm 3+ /Ca 2+ co-doped NaYF 4 nanoparticles with different Ca 2+ contents. Strong upconversion blue fluorescence could be observed under 980 nm laser excitation of the samples. The effect of different Ca 2+ contents on the luminescence inte...

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Veröffentlicht in:CrystEngComm 2022-07, Vol.24 (27), p.4887-4898
Hauptverfasser: Meng, Mingzhou, Zhang, Rui, Cheng, Zhenlong, Fa, Xinmeng, Yang, Jianghua, Ansari, Anees A., Ou, Jun, Wurth, Christian, Resch-Genger, Ute
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container_end_page 4898
container_issue 27
container_start_page 4887
container_title CrystEngComm
container_volume 24
creator Meng, Mingzhou
Zhang, Rui
Cheng, Zhenlong
Fa, Xinmeng
Yang, Jianghua
Ansari, Anees A.
Ou, Jun
Wurth, Christian
Resch-Genger, Ute
description A solvothermal method was used to prepare a series of Yb 3+ /Tm 3+ /Ca 2+ co-doped NaYF 4 nanoparticles with different Ca 2+ contents. Strong upconversion blue fluorescence could be observed under 980 nm laser excitation of the samples. The effect of different Ca 2+ contents on the luminescence intensity was investigated, and it was found that the UV-vis upconversion luminescence increased and then decreased with an increasing Ca 2+ concentration during the increase of the Ca 2+ content from 0 mol% to 25 mol%, reaching the strongest fluorescence at 15 mol%, which was up to about 28 times stronger than that without Ca 2+ doping. Furthermore, the mechanism was investigated, and it was found that the doping of Ca 2+ disrupted the symmetry of the crystal field, resulting in a significant enhancement of the overall fluorescence. Applied to fluorescence intensity ratio thermometry, the absolute and relative sensitivities are as high as 0.0418 K −1 and 2.31% K −1 , respectively, with a minimum temperature resolution of 0.0129 K.
doi_str_mv 10.1039/D2CE00562J
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title Effect of Ca 2+ doping on the upconversion luminescence properties of NaYF 4 :Yb 3+ /Tm 3+ nanoparticles and study of its temperature measurement performance
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