Issue 15, 2024

Er3+-activated Ba2V2O7 upconversion nanosheets for dual-mode temperature sensing

Abstract

So far, there has been substantial research on non-contact luminescence thermometry approaches that rely on luminescence intensity ratio (LIR) technology. However, there is limited availability of phosphors doped with Er3+ ions that exhibit on-par luminescence and high sensitivity. In this work, samples of Ba2V2O7:Er3+ were synthesized using a sol–gel method aided by citric acid. The luminescence properties of these samples, including upconversion and down-shifting, were investigated using both ultraviolet and 980 nm laser stimulation. When subjected to ultraviolet (UV) light, the sample exhibits a distinct broadband emission that appears pale green. This emission is a distinguishing property of the sample and is attributed to the presence of V2O72− ions. Upon being stimulated by a 980 nm laser, the sample exhibits standard green up-conversion Er3+ emission bands. Concurrently, an assessment was conducted on the phosphor's ability to measure temperature by analysing the LIR between the thermally coupled 2H11/2, 4S3/2 energy levels (TCELs) and the non-thermally coupled 2H11/2, 4F9/2 energy levels (NTCELs) of the Er3+ ion. The corresponding highest sensitivity of temperature for TCELs and NTCELs can position Ba2V2O7:Er3+ nanosheets as a capable option for materials utilized in temperature-sensing applications.

Graphical abstract: Er3+-activated Ba2V2O7 upconversion nanosheets for dual-mode temperature sensing

Supplementary files

Article information

Article type
Paper
Submitted
15 déc. 2023
Accepted
06 mars 2024
First published
07 mars 2024

Nanoscale, 2024,16, 7443-7452

Er3+-activated Ba2V2O7 upconversion nanosheets for dual-mode temperature sensing

S. K. Samal, S. Kulkarni, J. Yadav and B. S. Naidu, Nanoscale, 2024, 16, 7443 DOI: 10.1039/D3NR06401H

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