Room-temperature ultrafast synthesis, morphology and upconversion luminescence of K0.3Bi0.7F2.4:Yb3+/Er3+ nanoparticles for temperature-sensing application

Xiaoli Gao; Feng Song; Dandan Ju; Aihua Zhou; Adnan Khan; Ziyu Chen; Xu Sang; Ming Feng; Lisa Liu

doi:10.1039/D0CE01231A

Room-temperature ultrafast synthesis, morphology and upconversion luminescence of K_0.3Bi_0.7F_2.4:Yb³⁺/Er³⁺ nanoparticles for temperature-sensing application†

Xiaoli Gao,^ab Feng Song,

*^ab Dandan Ju,^c Aihua Zhou,

^d Adnan Khan,^ab Ziyu Chen,^ab Xu Sang,^ab Ming Feng^ab and Lisa Liu^ab

Author affiliations

* Corresponding authors

^a School of Physics, The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Nankai University, Tianjin, PR China
E-mail: fsong@nankai.edu.cn

^b Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China

^c School of Science, Tianjin Chengjian University, Tianjin 300384, PR China

^d Physics Department, School of Science, Tianjin University of Science & Technology, Tianjin 300457, People's Republic of China

Abstract

An ultrafast route at room temperature has been developed for the first time to synthesize lanthanide ion (Yb³⁺/Er³⁺)-activated K_0.3Bi_0.7F_2.4 fluorescent nanoparticles and hold the potential to be applied in luminescent temperature sensors. In addition, the crystal structure and morphology of the K_0.3Bi_0.7F_2.4 nanoparticles prepared at different reaction conditions were studied in detail for the first time, including the reaction time and different mole ratios of Bi source and NH₄F. Moreover, Yb³⁺/Er³⁺ doped in the K_0.3Bi_0.7F_2.4 matrix using a luminescent thermometer based on the fluorescence intensity ratio technology was also investigated. Additionally, K_0.3Bi_0.7F_2.4:Yb³⁺/Er³⁺ revealed excellent up-conversion luminescence performance, and the up-conversion mechanisms of samples are affirmed according to the up-conversion emission intensity as a function of the pump power density. Simultaneously, the optical thermometric performance of the samples was investigated in the temperature range of 323–523 K to indagate the temperature sensor performance. Significantly, the maximum sensor sensitivity of the studied nanoparticles were 0.0058 K⁻¹ (S_a) at 523 K and 1.08 K⁻¹ (S_r) at 323 K, which indicates that K_0.3Bi_0.7F_2.4:20%Yb³⁺/2%Er³⁺ fluorescent nanoparticles can be exploited as a promising luminescent thermometer.

This article is part of the themed collection: Editor’s Collection: Rare Earth Materials

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Article information

DOI: https://doi.org/10.1039/D0CE01231A
Article type: Paper
Submitted: 23 Aug 2020
Accepted: 12 Sep 2020
First published: 07 Oct 2020

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CrystEngComm, 2020,22, 7066-7074

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Room-temperature ultrafast synthesis, morphology and upconversion luminescence of K_0.3Bi_0.7F_2.4:Yb³⁺/Er³⁺ nanoparticles for temperature-sensing application

X. Gao, F. Song, D. Ju, A. Zhou, A. Khan, Z. Chen, X. Sang, M. Feng and L. Liu, CrystEngComm, 2020, 22, 7066 DOI: 10.1039/D0CE01231A

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