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Er-activated BaVO upconversion nanosheets for dual-mode temperature sensing. | LitMetric

AI Article Synopsis

  • Research focuses on non-contact luminescence thermometry using luminescence intensity ratio (LIR) technology, but there's a scarcity of high-sensitivity Er-doped phosphors.
  • BaVO:Er samples were synthesized through a sol-gel method with citric acid and analyzed for their luminescence properties under different laser stimulations.
  • The study found that BaVO:Er exhibits distinct emissions under UV and 980 nm laser stimulation, showing potential for high sensitivity in temperature-sensing applications through the analysis of energy levels in Er ions.

Article 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 Er ions that exhibit on-par luminescence and high sensitivity. In this work, samples of BaVO:Er 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 VO ions. Upon being stimulated by a 980 nm laser, the sample exhibits standard green up-conversion Er emission bands. Concurrently, an assessment was conducted on the phosphor's ability to measure temperature by analysing the LIR between the thermally coupled H, S energy levels (TCELs) and the non-thermally coupled H, F energy levels (NTCELs) of the Er ion. The corresponding highest sensitivity of temperature for TCELs and NTCELs can position BaVO:Er nanosheets as a capable option for materials utilized in temperature-sensing applications.

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Source
http://dx.doi.org/10.1039/d3nr06401hDOI Listing

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