Bi 3+ -based luminescent thermometry in perovskite-type CaZrO 3 phosphor
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Bi3+‑based luminescent thermometry in perovskite‑type CaZrO3 phosphor Xiuna Tian1 · Hongjian Dou1 · Lingyuan Wu2 Received: 22 October 2019 / Accepted: 20 January 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Based on the luminescence of Bi3+, novel temperature sensing materials CaZrO3:Bi3+ and CaZrO3:Bi3+/Sm3+ were successfully synthesized by solid-state reaction. The XRD patterns show that the synthesized materials have a pure phase of CaZrO3. The XPS results show that the Bi3+ and Sm3+ can be detected in CaZrO3:Bi3+/Sm3+. With the excitation of 318 nm, the CaZrO3:Bi3+ material shows intense temperature-dependent luminescence. The maximum relative sensitivity can be obtained at 440 K (1.78% K−1). Under the excitation of 408 nm, the CaZrO3:Sm3+ material shows the characteristic emission peaks of Sm3+. The spectral overlap between the emission spectrum of Bi3+ and the excitation spectrum of Sm3+ leads to an energy transfer from Bi3+ to Sm3+ in CaZrO3:Bi3+/Sm3+ phosphor. With the excitation of 318 nm, the emission spectrum of CaZrO3:Bi3+/Sm3+ material shows the characteristic peaks of B i3+ and S m3+. The fluorescence decay curves also show the 3+ 3+ evidence of the energy transfer from Bi to Sm . The luminescence intensity ratio of Sm3+ and Bi3+ in CaZrO3:Bi3+/Sm3+ shows obvious temperature dependence. Based on the luminescence intensity ratio, a large relative sensitivity is obtained at 443 K (1.15% K−1).
1 Introduction Temperature is a fundamental physical quantity in various fields of science. Accurate measurement of temperature is very important and necessary. In recent years, temperature measurement technology based on inorganic phosphor materials has attracted people’s interest due to its non-contact and high sensitivity properties, such as rare earth or transition metal-doped materials [1–5]. Du et al. reported the temperature sensing method based on the upconversion luminescence of Y b3+/Er3+/Fe3+ tridoped N aBiF4 phosphor [6]. Chen et al. investigated the dual-activator luminescence of RE/TM codoped Y3Al5O12 (RE = Eu3+, Tb3+, Dy3+; TM = Mn4+, Cr3+) for optical thermometry [7]. Chi et al. reported Zn2GeO4:Mn2+ phosphor as a highly sensitive luminescent thermometer based on the luminescence of Mn2+ [8]. As is known, ions with s 2 configuration are of large importance in the field of luminescence. The influence * Xiuna Tian [email protected] 1
Department of Public Sciences, Jinzhou Medical University, Jinzhou 121001, Liaoning, China
Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China
2
of the host lattice on the luminescent properties of these ions is drastic. Therefore, we speculate that temperature will have a significant effect on the luminescence properties of these ions. To verify this, we choose B i3+ with 6 s2 configuration as the activator, which is a well-known luminescent ion in this class. Ions with s2 configuration usually show strong optical absorption in the
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