Dual-emission luminescence thermometry using LaGaO3:Cr3+, Nd3+ phosphors

Mullins, Abbi Louise; Ćirić, Aleksandar; Zekovic, Ivana; Williams, J.A. Gareth; Dramicanin, Miroslav; Evans, Ivana Radosavljevic

Abstract

A series of La1-xGa0.99O3: Cr0.01, Ndx phosphors (where x = 0.005, 0.01, 0.02) for luminescence thermometry have been synthesised by a solid-state method, structurally characterised using powder X-ray diffraction data, and investigated by ambient and variable-temperature optical measurements. The design principle relies on the use of a combination of transition metal and rare earth activator ions such that the excitation and emission wavelengths fall within the near infra-red spectral region, notably in the ‘first biological window’ that is attractive for potential in vivo applications. The photoluminescence spectra of the compounds feature the characteristic 2E phosphorescence of Cr3+ at 729 nm and the 4F3/2 to 4I9/2 emission of Nd3+ around 890 nm. The Nd3+ emission is quenched at a higher rate than that of Cr3+ with increasing temperature. Thermometric analysis by monitoring the luminescence intensity ratio (LIR) between the emissions of Cr3+ and Nd3+ from 300 K to 650 K shows a quasi-Boltzmann trend, with a maximum relative sensitivity of ~ 2% K–1, high absolute sensitivity values over this entire temperature range, excellent temperature resolution of 0.04 K at room temperature and high stability.

Citation

Mullins, A. L., Ćirić, A., Zekovic, I., Williams, J. G., Dramicanin, M., & Evans, I. R. (2022). Dual-emission luminescence thermometry using LaGaO3:Cr3+, Nd3+ phosphors. Journal of Materials Chemistry C Materials for optical and electronic devices, 10(28), 10396-10403. https://doi.org/10.1039/d2tc02011d

• Journal Article Type: Article
• Acceptance Date: Jun 22, 2022
• Online Publication Date: Jun 23, 2022
• Publication Date: Jul 28, 2022
• Deposit Date: Jun 24, 2022
• Publicly Available Date: Jun 24, 2022
• Journal: Journal of Materials Chemistry C Materials for optical and electronic devices
• Print ISSN: 2050-7526
• Electronic ISSN: 2050-7534
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 10
• Issue: 28
• Pages: 10396-10403
• DOI: https://doi.org/10.1039/d2tc02011d
• Public URL: https://durham-repository.worktribe.com/output/1200127