Rb<sub>2</sub>InCl<sub>5</sub>·H<sub>2</sub>O doped with Te<sup>4+</sup> for fluorescence thermometry and coordinated water-related structural phase transformation
Here, we synthesized Rb<sub>2</sub>InCl<sub>5</sub>·H<sub>2</sub>O with x Te<sup>4+</sup> doping by the coprecipitation method, which converts the original nonluminance for pure Rb<sub>2</sub>InCl<sub>5</sub>·H<sub>2</sub>O into orange luminescence ascribed to Te<sup>4+</sup> incorporation with an emission peak at 648 nm and a full width at half maximum of 142 nm (420.3 meV) at room temperature. The photoluminescence (PL) lifetime of Te<sup>4+</sup>-doped Rb<sub>2</sub>InCl<sub>5</sub>·H<sub>2</sub>O exhibits a strong temperature dependence, with a maximum absolute sensitivity (SA) of 12 × 10<sup>-3 </sup>K<sup>-1</sup> at 260 K and a relative sensitivity (SR) of 3.5%K<sup>-1</sup> at 300 K, demonstrating its capability for non-contact remote temperature measurement. Additionally, we capture the dynamic changes of coordinated water with temperature in Rb<sub>2</sub>InCl<sub>5</sub>·H<sub>2</sub>O through temperature-dependent Raman spectroscopy, analyze the resulting structural phase transformation associated with coordinated water, and investigate the reversibility of this phase transformation.
Authors
- Jing Zhou (ORCID: https://orcid.org/0000-0002-2475-7783)
- Xiunan Li (ORCID: https://orcid.org/0000-0002-2117-3547)
- Degui Kong (ORCID: https://orcid.org/0000-0002-6752-1383)
- Wenzhi Wu (ORCID: https://orcid.org/0000-0002-9126-7346)
- Chen Chen (ORCID: https://orcid.org/0000-0001-9355-0551)
- Jing Zhang (ORCID: https://orcid.org/0000-0002-9342-8473)
- B. Y. Hu (ORCID: https://orcid.org/0009-0007-2272-747X)
- G.F. Dong
Institutions
- Heilongjiang University (CN)
Publication Details
- Journal
- Optics Letters
- Published
- 2024-10-17
- DOI
- https://doi.org/10.1364/ol.541142
- Citations
- 5
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 1.04