Algorithm for Judd–Ofelt analysis of Pr3+ from the emission spectrum: Case study of Sr2LaF7:Pr3+ nano-powder Aleksandar Ćirić, Markus Suta, Tom Förster, Bojana Milićević, Tamara Gavrilović, et al. Journal of Applied Physics, 2026 The Judd–Ofelt theory governs the intensity of 4fn ↔ 4fn transitions of rare earth ions in terms of an admixed induced electric dipolar character from higher energetic even parity states by the crystal field and successfully reproduces experimental absorption and emission line strengths. Traditionally, the Judd–Ofelt theory requires three intensity parameters that have to be estimated from an experimental absorption spectrum. That approach is fundamentally problematic with non-transparent or polycrystalline materials, and particularly with Pr3+ ions due to the low energy difference between the excited 4f15d1 configuration and the 4f2 spin–orbit levels, which is in contrast with the closure approximation necessary for the validity of the Judd–Ofelt theory and usually leads to non-physical intensity parameters. In this work, an algorithm based on experimental emission spectra is presented that resolves these limitations. For that purpose, steady-state and time-resolved emission spectra at liquid nitrogen temperatures (T = 77 K) as well as decay times of the 1D2 and 3P0 levels were measured. The method was tested on hydrothermally prepared Sr2LaF7:Pr3+ as a representative example as this compound shows emission from both the 3P1,0 and 1D2 levels at room temperature with measured decay times of the 3P0 and 1D2 level of 59 and 225 μs, respectively. From the intensities of the 3P0 → 3H4,6, 3F2-based emission, and the 1D2-based decay time, Judd–Ofelt parameters of Ω2 = 2.34 × 10−20, Ω4 = 5.84 × 10−20, and Ω6 = 21.68 × 10−20 cm2 were obtained. The calculated values showed very good agreement with the diffuse reflectance measurements and allowed the prediction of Pr3+ near infrared emission intensities.
Sensor Fusion in Luminescence Thermometry: A Path to Higher Precision and Broader Applicability Aleksandar Ćirić, Zoran Ristić, Tamara Gavrilović, Jovana Periša, Mina Medić, et al. Laser and Photonics Reviews, 2025 Advancing measurement precision and extending the temperature range are key goals in luminescence thermometry. Traditional single‐parameter methods often underperform. Sensor fusion (SF), a statistical tool widely used in fields like autonomous vehicles and medical imaging, is applied to luminescent thermometry by combining multiple sensor probes or treating each temperature‐dependent parameter as a separate sensor. This approach consistently enhances precision and extends the temperature range, with fused precision equaling the sum of individual precisions. SF using inverse variance weighting surpasses traditional linear regression models due to its adaptability, achieving maximum performance with any sensor material. It works with both time‐resolved and steady‐state readouts, using single or multiple excitation sources. Computer simulations and experiments validate this method. For Sm2+, combining lifetime and intensity ratio measurements significantly improves precision across the entire range. Fusion of Mn4+, Ho3+, and Cr3+ lifetimes expands the temperature range to 300–650 K. For Yb3+/Er3+ upconversion green and red emission lifetimes, precision improves across all temperatures. However, Mn5+ shows limited improvement due to the dominance of precision in line‐shift measurements, highlighting a limitation of the approach. Overall, SF demonstrates its potential to revolutionize luminescence thermometry by enhancing precision and usability across diverse conditions.
Principal component analysis luminescence thermometry of Ce3+-case study of BaF2:Ce3+single crystals Aleksandar Ćirić, Marius Stef, Gabriel Buse, Jovana Periša, Zoran Ristić, et al. Journal of Applied Crystallography, 2025 Luminescence thermometry based on Ce3+-doped materials is limited by the lack of well separated emission bands and the nanosecond timescale of the 4f–5d transition, which complicate conventional temperature-readout methods. In this work, we demonstrate the application of principal component analysis (PCA) to enhance the temperature sensitivity of BaF2:Ce3+ single crystals. A crystal was grown by the vertical Bridgman method and characterized structurally and spectroscopically. Temperature-dependent photoluminescence spectra were recorded in the 300–550 K range under 270 nm LED excitation. PCA was applied to the emission spectra, enabling dimensionality reduction and extraction of a principal component (PC1) that exhibits a strong monotonic dependence on temperature. This PCA-based method achieves an average temperature resolution of ∼1 K, overcoming the limitations of traditional luminescence intensity ratio techniques for Ce3+ systems. These results highlight the potential of PCA for practical high-precision luminescence thermometry using Ce3+-doped materials.
Algorithm for Judd–Ofelt analysis of Pr3+ from the emission spectrum: Case study of Sr2LaF7: Pr3+ nano-powder A Ćirić, M Suta, T Förster, B Milićević, T Gavrilović, Ž Antić, ... Journal of Applied Physics 139 (16) , 2026 2026
Spectroscopic insight into up-conversion and down-conversion photoluminescence of HfO2: Ho3+ and HfO2: Ho3+/Yb3+ coatings synthesized by plasma electrolytic oxidation on hafnium S Stojadinović, A Ćirić Ceramics International , 2026 2026
Tunable up-conversion and down-conversion photoluminescence of HfO2: Er3+ and HfO2: Er3+/Yb3+ coatings formed by plasma electrolytic oxidation of hafnium S Stojadinović, A Ćirić Optical Materials, 117907 , 2026 2026 Citations: 1
Photoluminescence properties of HfO2: RE3+ (RE= Eu, Sm, Tb, Dy) coatings formed by plasma electrolytic oxidation of hafnium in an electrolyte containing RE oxide particles S Stojadinović, A Ćirić Journal of Alloys and Compounds, 186205 , 2026 2026
Machine learning-assisted luminescence thermometry using Mn5+-doped near-infrared phosphor with improved accuracy and precision S Kuzman, MD Dramićanin, A Ćirić, J Periša, B Milićević, Ž Antić, Z Ristić Sensors and Actuators A: Physical, 117292 , 2025 2025
Principal component analysis luminescence thermometry of Ce3+–case study of BaF2: Ce3+ single crystals A Ćirić, M Stef, G Buse, J Periša, Z Ristić, T Gavrilović, MD Dramićanin Applied Crystallography 58 (5) , 2025 2025 Citations: 1
Eu2+/Eu3+ doped Al2O3 coatings formed on tungsten by plasma electrolytic oxidation: photoluminescent properties and application in luminescence thermometry S Stojadinović, P Nelson, S Kuzman, J Periša, Z Ristić, A Ćirić Optical Materials 167, 117244 , 2025 2025 Citations: 1
High-Performance multiparametric luminescent thermometer: Dy3+-doped Sodium Alumino-Borate Glass A Ćirić, AG Gökçe, M Gökçe, S Kuzman, Z Ristić, B Milićević, D Koçyiğit, ... Journal of Luminescence, 121508 , 2025 2025 Citations: 1
Advancing luminescence thermometry: Employing multiple fluorescence intensity ratios of YAG: Er3+/Mn4+ nanocrystals for supersensitive temperature sensing J Periša, B Milićević, A Ćirić, I Zeković, V Đorđević, Ž Antić, ... Ceramics International 51 (17), 23224-23232 , 2025 2025 Citations: 8
Pr 3+ -Activated Sr 2 LaF 7 Nanoparticles as a Single-Phase White-Light-Emitting Nanophosphor B Milićević, A Ćirić, K Milenković, Z Ristić, J Periša, Ž Antić, ... Nanomaterials 15 (10), 717 , 2025 2025 Citations: 2
Doubling the relative sensitivity of YNbO4: Sm3+ luminescence thermometer by observing 4G7/2 emitting level LĐ Far, A Ćirić, K Milenković, M Medić, B Milićević, S Kuzman, ... Journal of Luminescence 280, 121125 , 2025 2025 Citations: 5
Eu3+-activated Sr2GdF7 colloid and nano-powder for horticulture LED applications B Milićević, A Ćirić, Z Ristić, M Medić, AN Alodhayb, IR Evans, Ž Antić, ... Journal of Alloys and Compounds 1010, 177820 , 2025 2025 Citations: 7
Sensor Fusion in Luminescence Thermometry: A Path to Higher Precision and Broader Applicability A Ćirić, Z Ristić, T Gavrilović, J Periša, M Medić, B Milićević, ... Laser & Photonics Reviews, e00781 , 2025 2025 Citations: 2
Readout Methods to Enhance the Performance of Luminescence Thermometers MD Dramićanin, AN Alodhayb, A Ćirić Condensed Matter 9 (4), 46 , 2024 2024 Citations: 6
Luminescence Thermometry with Eu 3+ -Doped Y 2 Mo 3 O 12 : Comparison of Performance of Intensity Ratio and Machine Learning Temperature Read-Outs T Gavrilović, V Đorđević, J Periša, M Medić, Z Ristić, A Ćirić, Ž Antić, ... Materials 17 (21), 5354 , 2024 2024 Citations: 2
Red emission enhancement in BaYF 5 :Eu 3+ phosphor nanoparticles by Bi 3+ co-doping K Milenković, L Đačanin Far, S Kuzman, Ž Antić, A Ćirić, MD Dramićanin, ... Optics Express 32 (23), 41632-41643 , 2024 2024 Citations: 2
Nanosized Eu 3+ -Doped NaY 9 Si 6 O 26 Oxyapatite Phosphor: A Comprehensive Insight into Its Hydrothermal Synthesis and Structural, Morphological, Electronic … M Ivanovici, A Ćirić, J Periša, M Marinović Cincović, MG Brik, ... Nanomaterials 14 (20), 1639 , 2024 2024 Citations: 2
Tuneable Red and Blue Emission of Bi 3+ -Co-Doped SrF 2 :Eu 3+ Nanophosphors for LEDs in Agricultural Applications J Periša, S Kuzman, A Ćirić, Z Ristić, Ž Antić, MD Dramićanin, B Milićević Nanomaterials 14 (20), 1617 , 2024 2024 Citations: 1
Luminescence Thermometry of Eu3+-Doped Y2Mo3O12: Comparison of Traditional LIR and Machine Learning Approach V Đorđević, T Gavrilović, A Ćirić, Z Ristić, M Medić, Ž Antić, ... Sensors and Electronic Instrumentation Advances, 31 , 2024 2024
Sensor fusion luminescence thermometry better together A Ćirić, Z Ristić, T Gavrilović, J Periša, M Medić, MD Dramićanin arXiv preprint arXiv:2409.03479 , 2024 2024 Citations: 1
MOST CITED SCHOLAR PUBLICATIONS
JOES: An application software for Judd-Ofelt analysis from Eu3+ emission spectra A Ćirić, S Stojadinović, M Sekulić, MD Dramićanin Journal of Luminescence 205, 351-356 , 2019 2019 Citations: 260
An extension of the Judd-Ofelt theory to the field of lanthanide thermometry A Ćirić, S Stojadinović, MD Dramićanin Journal of Luminescence 216, 116749 , 2019 2019 Citations: 86
Self-referenced method for the Judd–Ofelt parametrisation of the Eu 3+ excitation spectrum A Ćirić, Ł Marciniak, MD Dramićanin Scientific Reports 12 (1), 563 , 2022 2022 Citations: 79
The Impact of the COVID-19 Pandemic on Digital Library Usage: A Public Library Case Study J Ćirić, A Ćirić Journal of Web Librarianship , 2021 2021 Citations: 68
Comparison of Three Ratiometric Temperature Readings from the Er 3+ Upconversion Emission A Ćirić, J Aleksić, T Barudžija, Ž Antić, V Đorđević, M Medić, J Periša, ... Nanomaterials 10 (4), 627 , 2020 2020 Citations: 65
Luminescence Intensity Ratio Thermometry with Er 3+ : Performance Overview A Ćirić, T Gavrilović, MD Dramićanin Crystals 11 (2), 189 , 2021 2021 Citations: 62
MgAl2O4: Cr3+ luminescence thermometry probe in the physiological temperatures range A Ćirić, Z Ristić, J Periša, Ž Antić, MD Dramićanin Ceramics International 47 (19), 27151-27156 , 2021 2021 Citations: 61
Photoluminescence of ZrO2: Gd3+ and ZrO2: Dy3+ coatings formed by the plasma electrolytic oxidation A Ćirić, S Stojadinović Journal of Alloys and Compounds 832, 154907 , 2020 2020 Citations: 58
Judd-Ofelt parametrization from emission spectra: The case study of the Eu3+ 5D1 emitting level A Ćirić, S Stojadinović, MG Brik, MD Dramićanin Chemical Physics 528, 110513 , 2020 2020 Citations: 57
Time-integrated luminescence thermometry of Eu3+ and Dy3+ doped YVO4 A Ćirić, S Stojadinović, MD Dramićanin Sensors and Actuators A: Physical 295, 450-455 , 2019 2019 Citations: 57
Luminescence intensity ratio thermometry and judd-ofelt analysis of TiO2: Eu3+ A Ćirić, S Stojadinović, MD Dramićanin Optical Materials 85, 261-266 , 2018 2018 Citations: 55
Dual-emission luminescence thermometry using LaGaO 3: Cr 3+, Nd 3+ phosphors AL Mullins, A Ćirić, I Zeković, JAG Williams, MD Dramićanin, IR Evans Journal of Materials Chemistry C 10 (28), 10396-10403 , 2022 2022 Citations: 51
Supersensitive Sm 2+ ‐Activated Al 2 O 3 Thermometric Coatings for High‐Resolution Multiple Temperature Read‐Outs from Luminescence A Ćirić, S Stojadinović, Z Ristić, I Zeković, S Kuzman, Ž Antić, ... Advanced Materials Technologies 6 (4), 2001201 , 2021 2021 Citations: 43
Structural and photoluminescence properties of Y2O3 and Y2O3: Ln3+ (Ln= Eu, Er, Ho) films synthesized by plasma electrolytic oxidation of yttrium substrate A Ćirić, S Stojadinović Journal of Luminescence 217, 116762 , 2020 2020 Citations: 42
Photoluminescence properties of Eu3+ doped HfO2 coatings formed by plasma electrolytic oxidation of hafnium S Stojadinović, N Tadić, A Ćirić, R Vasilić Optical Materials 77, 19-24 , 2018 2018 Citations: 42
LumTHools-Software for fitting the temperature dependence of luminescence emission intensity, lifetime, bandshift, and bandwidth and luminescence thermometry and review of the … A Ćirić, MD Dramićanin Journal of Luminescence 252, 119413 , 2022 2022 Citations: 41
Judd-Ofelt and chromaticity analysis of hafnia doped with trivalent europium as a potential white LED phosphor A Ćirić, S Stojadinović, MD Dramićanin Optical Materials 88, 392-395 , 2019 2019 Citations: 40
Dy3+ and Dy3+/Ce3+ doped Al2O3 coatings obtained by plasma electrolytic oxidation: photoluminescence and energy transfer from Ce3+ to Dy3+ S Stojadinović, A Ćirić Journal of Luminescence 226, 117403 , 2020 2020 Citations: 37
Judd-Ofelt modelling of the dual-excited single band ratiometric luminescence thermometry A Ćirić, I Zeković, M Medić, Ž Antić, MD Dramićanin Journal of Luminescence 225, 117369 , 2020 2020 Citations: 37
Luminescence intensity ratio squared—A new luminescence thermometry method for enhanced sensitivity A Ćirić, Ł Marciniak, MD Dramićanin Journal of Applied Physics 131 (11) , 2022 2022 Citations: 35