Synthesis and thermometric properties of shuttle-like Er3+/Yb3+ co-doped NaLa(MoO4)2 microstructures

Dong He, Chongfeng Guo*, Shaoshuai Zhou, Liangliang Zhang, Zheng Yang, Changkui Duan, Min Yin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

Yb3+/Er3+ co-doped NaLa(MoO4)2 up-conversion (UC) monodisperse shuttle-like microcrystals were prepared by a hydrothermal method without any organic solvents or surfactants. The phase purity, structure and morphology of the samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The effects of the initial reaction solution pH values and reaction time on the morphologies of the final products were investigated. The temperature-dependent UC luminescence and temperature sensing properties of the samples were discussed according to the fluorescence intensity ratio (FIR) of green emissions from 2H11/2/4S3/24I15/2 transitions of Er3+ at 530 and 550 nm in the range of 300-510 K under excitation of a 980 nm laser. After sintering at 600°C for 1 h, the UC intensity of the sample increased about 1070 times that of the sample without calcination, and the maximum sensitivity of the samples with and without calcinations was approximately 0.0131 K-1 at 510 K and 0.0135 K-1 at 450 K, respectively. The results indicate that the sensitivity is hardly dependent on the UC luminescence intensities of the samples, and the present shuttle-like NaLa(MoO4)2 monodispersed microcrystals exhibited excellent temperature sensing properties.

Original languageEnglish
Pages (from-to)7745-7753
Number of pages9
JournalCrystEngComm
Volume17
Issue number40
DOIs
Publication statusPublished - 10 Sep 2015
Externally publishedYes

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