ORALS

SESSION: SolidStateChemistryTuePM1-R6	Alario-Franco international Symposium (2nd Intl Symp on Solid State Chemistry for Applications & Sustainable Development)
Tue. 29 Nov. 2022 / Room: Andaman 1
Session Chairs: Hiroshi Kageyama; Session Monitor: TBA

14:00: [SolidStateChemistryTuePM105] OS
High sensitivity temperature probing of Mn4+ doped Li4Ti5O12 by lifetime-based luminescence thermometry
Zoran Ristic¹ ; Mina Medic¹ ; Vesna Djordjevic¹ ; Sanja Kuzman¹ ; Mikhail G. Brik² ; Miroslav Dramicanin¹ ; ¹University of Belgrade, Vinca Institute of Nuclear Sciences, Belgrade, Serbia and Montenegro; ²Institute of Physics, University of Tartu,, Tartu 50411, Estonia;
Paper Id: 63 [Abstract]

<p>In this work we utilise luminescent properties of Mn⁴⁺ doped Li₄Ti₅O₁₂ - a very promising material for ultrafast-charge-discharge and long-cycle-life batteries [1]. Applying lifetime-based luminescence thermometry on Mn⁴⁺ doped materials the remote and non-contact temperature readings are possible with great relative sensitivity [2-4].<br />The Mn⁴⁺ doped Li₄Ti₅O₁₂ samples were prepared by the one step solid-state method using stoichiometric amounts of Li₂CO₃, TiO₂ and MnO₂ at 850 ^oC to obtain cubic spinel structure with space group Fd-3m as confirmed by X-ray diffraction analysis. In this host, Mn⁴⁺ is in a strong crystal field providing the strong absorption around 500 nm due to ⁴A_2g &rarr;⁴T_2g electric spin-allowed electron transition and with emission around 679 nm on account of ²E_g &rarr;⁴A_2g spin forbidden electron transition. Due to the coupling to phonon modes of the host material [5] the change of radiative decay rate (radiative lifetime) starts at very low temperatures (&raquo;75 K). In addition, the low value of energy of ⁴T_2g level (20000 cm&minus;1) leads to the strong emission and radiative lifetime quenching starting at low temperatures (&raquo;250 K) which favours the use of this material for the luminescence thermometry in a broad temperature range. <br />Temperature dependences of photo-luminescent emission spectra and emission decay are measured over the 10&ndash;350 K range exhibiting quite large value of relative sensitivity (2.6% K&minus;1@330 K) that facilitates temperature measurements with temperature resolution better than 0.15 K around room temperature.</p>

References:
<p>[1] Bote Zhao, Ran Ran, Meilin Liu, Zongping Shao ; A comprehensive review of Li4Ti5O12-based electrodes for lithium-ion batteries: The latest advancements and future perspectives ; Materials Science and Engineering: R: Reports,Volume 98,Pages 1-71, 2015\n[2] Sekulić, M., Ristic, Z., Milićević, B., Antić, Ž., Đorđević, V., &amp; Dramićanin, M. D. (2019). Li1.8Na0.2TiO3:Mn4+: The highly sensitive probe for the low-temperature lifetime-based luminescence thermometry. Optics Communications, 452, 342&ndash;346.\n[3] Li F., Cai J., Chi F.F., Chen Y., Duan C., Yin M.Investigation of luminescence from luag: Mn4+ for physiological temperature sensing, Opt. Mater., 66 (2017), pp. 447-452,\n[4]Glais E., Đorđević V., Papan J., Viana B., Dramićanin M.D.MgTiO3:Mn4+ a multi-reading temperature nanoprobe, RSC Adv., 8 (2018), pp. 18341-18346,\n[5] Senden T., van Dijk-Moes R.J.A., Meijerink A. Quenching of the red Mn4+ luminescence in Mn4+-doped fluoride LED phosphors, Light Sci. Appl., 7 (2018), p. 8</p>

SESSION: SolidStateChemistryTuePM1-R6	Alario-Franco international Symposium (2nd Intl Symp on Solid State Chemistry for Applications & Sustainable Development)
Tue. 29 Nov. 2022 / Room: Andaman 1
Session Chairs: Hiroshi Kageyama; Session Monitor: TBA

14:25: [SolidStateChemistryTuePM106] OS
LUMINESCENCE THERMOMETRY BASED ON NEAR-INFRARED EMISSION OF Yb3+,Er3+:YAG
Zeljka Antic¹ ; Jovana Periša² ; Aleksandar Ćirić³ ; Mina Medic² ; Ivana Zeković² ; Miroslav Dramicanin² ; Sanja Kuzman² ; ¹Vinca Institute of Nuclear Sciences, University of Belgrade, Belgrade, Serbia and Montenegro; ²University of Belgrade, Vinca Institute of Nuclear Sciences, Belgrade, Serbia and Montenegro; ³Vinča Institute of Nuclear Sciences, Knjaževac, Serbia and Montenegro;
Paper Id: 62 [Abstract]

<p>Temperature plays an essential role in biological systems, affecting a variety of their properties. For example, the cell division rate, and consequently tissue growth, are both critically influenced by temperature. The precise measurement of temperature is needed for both early diagnosis and treatment of malignant diseases. Nowadays, luminescence thermometry is considered to be a promising tool for non-invasive bio-thermal-imaging [1]. For such use, the biocompatible and near-infrared-emitting nanoparticles showing the strong temperature dependence of emission are urgently needed. Working within a near-infrared spectral region (the first and second biological windows) overcomes small light penetration lengths occurring with visible-emitting nanoparticles since in biological windows the extinction coefficient of tissues is low due to a simultaneous reduction in both tissue scattering and absorption coefficients [2]. Herein, well-known Yb3+,Er3+-doped yttrium aluminium garnet (YAG) nanopowder is prepared by the combustion method. The cubic structure of the material was confirmed by X-ray diffraction measurements, while UV-Vis-NIR diffuse reflectance showed typical Yb3+/Er3+ absorption bands. We have investigated the temperature dependence of near-infrared emission of the phosphor aiming to compare the thermometric performances of two different read-outs: i) changes in the intensities of emission bands and ii) changes in the emission bands position and bandwidths. Temperature dependant near-infrared emission spectra were measured in the 1000-1550 nm spectral range upon 980 nm excitation. Following combinations were investigated: i) luminescence intensity ratio of 1470/1530 nm Er3+ emission lines; ii) luminescence intensity ratio of 1030 nm Yb3+ and two Er3+ emission lines (1470 and 1530 nm); iii) Yb3+ emission band position and iv) Yb3+ emission bandwidth (FWHM). Among investigated read-out approaches, the most important figures of merit, absolute and relative sensitivities, and temperature resolutions have been calculated and compared.</p>

References:
<p>[1] M. D. Dramićanin, Luminescence Thermometry, Imprint Woodhead Publishing, Elsevier Science: Cambridge, United Kingdom (2018) [2] B. del Rosal, A. P&eacute;rez-Delgado, M. Misiak, A. Bednarkiewicz, A. S. Vanetsev, Y. Orlovskii, D. J. Jovanović, M. D. Dramićanin, U. Rocha, K. Upendra Kumar, C. Jacinto, E. Navarro, E. Mart&iacute;n Rodr&iacute;guez, M. Pedroni, A. Speghini, G. A. Hirata, I. R. Mart&iacute;n, D. Jaque, J. Appl. Phys., 118 (2015) 143104 (11p).</p>