Synthesis of Core-Shell ScF3 Nanoparticles for Thermal Enhancement of Upconversion
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Detail(s)
Original language | English |
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Pages (from-to) | 158–163 |
Journal / Publication | Chemistry of Materials |
Volume | 33 |
Issue number | 1 |
Online published | 15 Dec 2020 |
Publication status | Published - 12 Jan 2021 |
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Abstract
Lanthanide-doped ScF3 nanoparticles are synthesized and explored for thermal enhancement of upconversion. A hot-injection method is developed to control the formation of ScF3 nanoparticles with a core-shell nanostructure of uniform size and morphology. Temperature dependence of the upconversion emission is investigated in the temperature range from 168 to 308 K. In contrast to typical NaYF4:Yb/Er@NaYF4 nanoparticles that display thermally quenched emissions, a 3.7-fold enhancement of the upconversion emission is recorded for the ScF3:Yb/Er@ScF3 nanoparticles as the temperature is increased from 168 to 248 K because of the negative thermal expansion of the ScF3 host lattice. Besides, the emission profiles of the nanocrystals also display a strong temperature dependence, enabling convenient ratiometric thermometry with a relative sensitivity of 1.73%·K-1 at 168 K. As the core-shell nanoparticles are minimally susceptible to surface quenching, our findings may inspire new ideas for developing thermally enhanced upconversion nanoparticles with high emission intensities.
Citation Format(s)
Synthesis of Core-Shell ScF3 Nanoparticles for Thermal Enhancement of Upconversion. / Ren, Biyun; Chen, Bing; Zhao, Jianxiong et al.
In: Chemistry of Materials, Vol. 33, No. 1, 12.01.2021, p. 158–163.
In: Chemistry of Materials, Vol. 33, No. 1, 12.01.2021, p. 158–163.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review