TY  - CONF
AU  - Stamenković, Tijana
AU  - Radmilović, Nadežda
AU  - Dinić, Ivana
AU  - Vuković, Marina
AU  - Barudžija, Tanja
AU  - Čebela, Maria
AU  - Lojpur, Vesna
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6067
AB  - In this investigation, samples of SrGd2O4 doped with different Yb3+ (2, 4, 6 at.%) ions and constant Ho3+ (1 at.%) and Bi3+ (2 at.%) concentrations were prepared. The sol-gel method with glycine as a fuel and citric acid as a chelator was chosen for sample preparation. All samples were heated in the furnace for 1.5 h at 500 °C and then thermally treated for 2.5 h at 1000 °C. The pure orthorhombic lattice of SrGd2O4, space group Pnma, was revealed by X-ray diffraction (XRD) (JCPDS Card No.:01-072-6387). Transmission electron microscopy (TEM) discovered agglomerated clusters of spherical particles measuring around 150 nm in size. Including Bi3+ ions into the structure influenced the morphology of the sample showing fine packing of pyramidal-shaped nanoparticles. The uniform distribution of constitutive elements in the samples was confirmed by energy dispersive spectroscopy (EDS). Up-conversion emission properties were evaluated from photoluminescent emission spectra and intensity dependence on excitation power after excitation at 976 nm. Dominant green (550 nm), red (671 nm), and infrared (758 nm) 5F4, 5S2 → 5I8, 5F5 → 5I8, 5F4, 5S2 → 5I7 transition emissions, respectively, are detected in all samples. The sample co-doped with Bi3+ showed the most intense photoluminescent emission.
PB  - Belgrade : Institut za multidisciplinarna istraživanja
C3  - Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
T1  - Enhancement of up-conversion luminescent characteristics of Yb3+/Ho3+ co-doped Bi3+ based SrGd2O4 nanoparticles
UR  - https://hdl.handle.net/21.15107/rcub_dais_14663
ER  - 

@conference{
author = "Stamenković, Tijana and Radmilović, Nadežda and Dinić, Ivana and Vuković, Marina and Barudžija, Tanja and Čebela, Maria and Lojpur, Vesna",
year = "2023",
abstract = "In this investigation, samples of SrGd2O4 doped with different Yb3+ (2, 4, 6 at.%) ions and constant Ho3+ (1 at.%) and Bi3+ (2 at.%) concentrations were prepared. The sol-gel method with glycine as a fuel and citric acid as a chelator was chosen for sample preparation. All samples were heated in the furnace for 1.5 h at 500 °C and then thermally treated for 2.5 h at 1000 °C. The pure orthorhombic lattice of SrGd2O4, space group Pnma, was revealed by X-ray diffraction (XRD) (JCPDS Card No.:01-072-6387). Transmission electron microscopy (TEM) discovered agglomerated clusters of spherical particles measuring around 150 nm in size. Including Bi3+ ions into the structure influenced the morphology of the sample showing fine packing of pyramidal-shaped nanoparticles. The uniform distribution of constitutive elements in the samples was confirmed by energy dispersive spectroscopy (EDS). Up-conversion emission properties were evaluated from photoluminescent emission spectra and intensity dependence on excitation power after excitation at 976 nm. Dominant green (550 nm), red (671 nm), and infrared (758 nm) 5F4, 5S2 → 5I8, 5F5 → 5I8, 5F4, 5S2 → 5I7 transition emissions, respectively, are detected in all samples. The sample co-doped with Bi3+ showed the most intense photoluminescent emission.",
publisher = "Belgrade : Institut za multidisciplinarna istraživanja",
journal = "Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia",
title = "Enhancement of up-conversion luminescent characteristics of Yb3+/Ho3+ co-doped Bi3+ based SrGd2O4 nanoparticles",
url = "https://hdl.handle.net/21.15107/rcub_dais_14663"
}

Stamenković, T., Radmilović, N., Dinić, I., Vuković, M., Barudžija, T., Čebela, M.,& Lojpur, V.. (2023). Enhancement of up-conversion luminescent characteristics of Yb3+/Ho3+ co-doped Bi3+ based SrGd2O4 nanoparticles. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
Belgrade : Institut za multidisciplinarna istraživanja..
https://hdl.handle.net/21.15107/rcub_dais_14663

Stamenković T, Radmilović N, Dinić I, Vuković M, Barudžija T, Čebela M, Lojpur V. Enhancement of up-conversion luminescent characteristics of Yb3+/Ho3+ co-doped Bi3+ based SrGd2O4 nanoparticles. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia. 2023;.
https://hdl.handle.net/21.15107/rcub_dais_14663 .

Stamenković, Tijana, Radmilović, Nadežda, Dinić, Ivana, Vuković, Marina, Barudžija, Tanja, Čebela, Maria, Lojpur, Vesna, "Enhancement of up-conversion luminescent characteristics of Yb3+/Ho3+ co-doped Bi3+ based SrGd2O4 nanoparticles" in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia (2023),
https://hdl.handle.net/21.15107/rcub_dais_14663 .

TY  - CONF
AU  - Stamenković, Tijana
AU  - Ranđelović, Marjan
AU  - Čebela, Maria
AU  - Vuković, Marina
AU  - Dinić, Ivana
AU  - Mančić, Lidija
AU  - Lojpur, Vesna
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6066
AB  - The aim of this research was to investigate for the first-time photocatalytic degradation of methylene blue over SrGd2O4 powders co-doped with constant Er3+ (0.5 at.%) and different Yb3+ (1, 2.5 and 5 at.%) concentrations. Samples were successfully prepared via sol-gel assisted combustion method. They exhibit photoluminescence properties which are manifested as red emission at 661 nm (4F9/2 → 4I15/2) and two green emissions at 551 and 523 nm (4S3/2 → 4I15/2 and 2H11/2 → 4I15/2). X-ray Powder Diffraction pattern proved that all samples crystallize as a pure orthorhombic phase. Scanning electron microscopy was used for morphology characterization and it revealed the existence of porous agglomerated round-shaped particles. Energy dispersive X-ray spectroscopy showed the presence of dopant ions and even distribution of all constituting elements. To calculate the energy band gap, UV-VIS diffuse reflectance spectroscopy was performed and a value of 4.3 eV was obtained, as well as the four additional values from the bands at lower energies. Photocatalytic degradation of methylene blue was monitored using UV-VIS absorption spectroscopy. Obtained results were promising since after 4 h of exposure to the simulating Sun irradiation, more than 50% of the starting dye concentration was mineralized.
PB  - Belgrade : Institut za multidisciplinarna istraživanja
C3  - Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
T1  - Characterization and photocatalytic activity of newly synthesized Er and Yb doped SrGd2O4 nanophosphorus
UR  - https://hdl.handle.net/21.15107/rcub_dais_14662
ER  - 

@conference{
author = "Stamenković, Tijana and Ranđelović, Marjan and Čebela, Maria and Vuković, Marina and Dinić, Ivana and Mančić, Lidija and Lojpur, Vesna",
year = "2023",
abstract = "The aim of this research was to investigate for the first-time photocatalytic degradation of methylene blue over SrGd2O4 powders co-doped with constant Er3+ (0.5 at.%) and different Yb3+ (1, 2.5 and 5 at.%) concentrations. Samples were successfully prepared via sol-gel assisted combustion method. They exhibit photoluminescence properties which are manifested as red emission at 661 nm (4F9/2 → 4I15/2) and two green emissions at 551 and 523 nm (4S3/2 → 4I15/2 and 2H11/2 → 4I15/2). X-ray Powder Diffraction pattern proved that all samples crystallize as a pure orthorhombic phase. Scanning electron microscopy was used for morphology characterization and it revealed the existence of porous agglomerated round-shaped particles. Energy dispersive X-ray spectroscopy showed the presence of dopant ions and even distribution of all constituting elements. To calculate the energy band gap, UV-VIS diffuse reflectance spectroscopy was performed and a value of 4.3 eV was obtained, as well as the four additional values from the bands at lower energies. Photocatalytic degradation of methylene blue was monitored using UV-VIS absorption spectroscopy. Obtained results were promising since after 4 h of exposure to the simulating Sun irradiation, more than 50% of the starting dye concentration was mineralized.",
publisher = "Belgrade : Institut za multidisciplinarna istraživanja",
journal = "Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia",
title = "Characterization and photocatalytic activity of newly synthesized Er and Yb doped SrGd2O4 nanophosphorus",
url = "https://hdl.handle.net/21.15107/rcub_dais_14662"
}

Stamenković, T., Ranđelović, M., Čebela, M., Vuković, M., Dinić, I., Mančić, L.,& Lojpur, V.. (2023). Characterization and photocatalytic activity of newly synthesized Er and Yb doped SrGd2O4 nanophosphorus. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
Belgrade : Institut za multidisciplinarna istraživanja..
https://hdl.handle.net/21.15107/rcub_dais_14662

Stamenković T, Ranđelović M, Čebela M, Vuković M, Dinić I, Mančić L, Lojpur V. Characterization and photocatalytic activity of newly synthesized Er and Yb doped SrGd2O4 nanophosphorus. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia. 2023;.
https://hdl.handle.net/21.15107/rcub_dais_14662 .

Stamenković, Tijana, Ranđelović, Marjan, Čebela, Maria, Vuković, Marina, Dinić, Ivana, Mančić, Lidija, Lojpur, Vesna, "Characterization and photocatalytic activity of newly synthesized Er and Yb doped SrGd2O4 nanophosphorus" in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia (2023),
https://hdl.handle.net/21.15107/rcub_dais_14662 .

TY  - JOUR
AU  - Stamenković, Tijana
AU  - Dinić, Ivana
AU  - Vuković, Marina
AU  - Radmilović, Nadežda
AU  - Barudžija, Tanja
AU  - Tomić, Miloš
AU  - Mančić, Lidija
AU  - Lojpur, Vesna
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6087
AB  - In this investigation, samples of strontium-gadolinium-oxide (SrGd2O4) doped with different Yb3+ (2, 4 and 6 at%) and constant Ho3+ (1 at%) contents and co-doped with Bi3+ (2 at%) were prepared using the glycine-assisted sol–gel method. The pure orthorhombic SrGd2O4 phase, space group Pnma, was revealed using X-ray diffraction in all samples. Transmission electron microscopy discovered agglomerated clusters of spherical particles measuring approximately 150 nm in size. The inclusion of Bi3+ ions into the structure influenced the morphology since the formation of larger grains was observed, with sizes reaching up to ∼1.7 μm. The uniform distribution of all constitutive elements was confirmed by energy-dispersive X-ray spectroscopy. In all samples, up-conversion emission spectra revealed two dominant green (540 and 550 nm), red (671 nm), and infrared (758 nm) emission lines, due to the 5F4,5S2→5I8, 5F5→5I8, and 5F4,5S2 → 5I7 transitions, respectively. The sample co-doped with Bi3+ showed the most intense photoluminescent emissions, shorter luminescence decay, and the highest quantum yield. Additionally, a significant decrease in the energy band gap value was detected using diffuse reflectance spectroscopy for this sample. Methylene blue was used as a test pollutant to investigate its photocatalytic efficiency under simulated sunlight irradiation. The results show that Bi3+ co-doping deteriorates the photocatalytic efficiency of the SrGd2O4:Yb3+/Ho3+ phase by reducing hydroxyl radical formation.
PB  - Elsevier
T2  - Ceramics International
T1  - Effect of Bi3+co-doping on the up-converting and photocatalytic properties of SrGd2O4:Yb3+/Ho3+ phase
VL  - 49
IS  - 23
SP  - 37758
EP  - 37767
DO  - 10.1016/j.ceramint.2023.09.103
UR  - https://hdl.handle.net/21.15107/rcub_dais_15138
ER  - 

@article{
author = "Stamenković, Tijana and Dinić, Ivana and Vuković, Marina and Radmilović, Nadežda and Barudžija, Tanja and Tomić, Miloš and Mančić, Lidija and Lojpur, Vesna",
year = "2023",
abstract = "In this investigation, samples of strontium-gadolinium-oxide (SrGd2O4) doped with different Yb3+ (2, 4 and 6 at%) and constant Ho3+ (1 at%) contents and co-doped with Bi3+ (2 at%) were prepared using the glycine-assisted sol–gel method. The pure orthorhombic SrGd2O4 phase, space group Pnma, was revealed using X-ray diffraction in all samples. Transmission electron microscopy discovered agglomerated clusters of spherical particles measuring approximately 150 nm in size. The inclusion of Bi3+ ions into the structure influenced the morphology since the formation of larger grains was observed, with sizes reaching up to ∼1.7 μm. The uniform distribution of all constitutive elements was confirmed by energy-dispersive X-ray spectroscopy. In all samples, up-conversion emission spectra revealed two dominant green (540 and 550 nm), red (671 nm), and infrared (758 nm) emission lines, due to the 5F4,5S2→5I8, 5F5→5I8, and 5F4,5S2 → 5I7 transitions, respectively. The sample co-doped with Bi3+ showed the most intense photoluminescent emissions, shorter luminescence decay, and the highest quantum yield. Additionally, a significant decrease in the energy band gap value was detected using diffuse reflectance spectroscopy for this sample. Methylene blue was used as a test pollutant to investigate its photocatalytic efficiency under simulated sunlight irradiation. The results show that Bi3+ co-doping deteriorates the photocatalytic efficiency of the SrGd2O4:Yb3+/Ho3+ phase by reducing hydroxyl radical formation.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Effect of Bi3+co-doping on the up-converting and photocatalytic properties of SrGd2O4:Yb3+/Ho3+ phase",
volume = "49",
number = "23",
pages = "37758-37767",
doi = "10.1016/j.ceramint.2023.09.103",
url = "https://hdl.handle.net/21.15107/rcub_dais_15138"
}

Stamenković, T., Dinić, I., Vuković, M., Radmilović, N., Barudžija, T., Tomić, M., Mančić, L.,& Lojpur, V.. (2023). Effect of Bi3+co-doping on the up-converting and photocatalytic properties of SrGd2O4:Yb3+/Ho3+ phase. in Ceramics International
Elsevier., 49(23), 37758-37767.
https://doi.org/10.1016/j.ceramint.2023.09.103
https://hdl.handle.net/21.15107/rcub_dais_15138

Stamenković T, Dinić I, Vuković M, Radmilović N, Barudžija T, Tomić M, Mančić L, Lojpur V. Effect of Bi3+co-doping on the up-converting and photocatalytic properties of SrGd2O4:Yb3+/Ho3+ phase. in Ceramics International. 2023;49(23):37758-37767.
doi:10.1016/j.ceramint.2023.09.103
https://hdl.handle.net/21.15107/rcub_dais_15138 .

Stamenković, Tijana, Dinić, Ivana, Vuković, Marina, Radmilović, Nadežda, Barudžija, Tanja, Tomić, Miloš, Mančić, Lidija, Lojpur, Vesna, "Effect of Bi3+co-doping on the up-converting and photocatalytic properties of SrGd2O4:Yb3+/Ho3+ phase" in Ceramics International, 49, no. 23 (2023):37758-37767,
https://doi.org/10.1016/j.ceramint.2023.09.103 .,
https://hdl.handle.net/21.15107/rcub_dais_15138 .

TY  - CONF
AU  - Stamenković, Tijana
AU  - Lojpur, Vesna
AU  - Radmilović, Nadežda
AU  - Vuković, Marina
AU  - Dinić, Ivana
AU  - Mančić, Lidija
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5745
AB  - Optically active materials have a wide range of applications. The phenomenon of light conversion includes two main types: up-conversion, which is the ability of convertion lower energy photons into the ones with the higher energy, and down-conversion, which is vice versa. Orthorhorhombic SrGd2O4 doped with rare earth elements is established to have promising optical characteristics, but rarely explored until nowadays as up-converting material. Due to the phonon energy of around 475 cm-1, which is lower than in many other compounds commonly used hosts, this one has a great perspective as an optically active material. Here, for the first time two combinations of rare earth dopant ions, Yb3+/Ho3+ and Yb3+/Tm3+, with different mutual ratios were chosen as pairs for inducing up-conversion. Sol-gel assisted combustion synthesis, which comprises citric acid as chelator and glycine as fuel, was used to obtain powdered samples that are subsequently thermally treated for 3.5 h at 1100°C. X-ray powder diffraction analysis (XRPD) was performed to determine crystal structure. Morphology characteristics were observed by scanning and transmission electron microscopy (SEM/TEM). Photoluminescent up-converting properties were measured in function of laser power (976 nm) in order to define optimal doping concentration and upconversion mechanism.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.
T1  - Optically active SrGd2O4 phase: Yb3+/Ho3+ and Yb3+/Tm3+ co-doping
SP  - 76
EP  - 77
UR  - https://hdl.handle.net/21.15107/rcub_dais_13629
ER  - 

@conference{
author = "Stamenković, Tijana and Lojpur, Vesna and Radmilović, Nadežda and Vuković, Marina and Dinić, Ivana and Mančić, Lidija",
year = "2022",
abstract = "Optically active materials have a wide range of applications. The phenomenon of light conversion includes two main types: up-conversion, which is the ability of convertion lower energy photons into the ones with the higher energy, and down-conversion, which is vice versa. Orthorhorhombic SrGd2O4 doped with rare earth elements is established to have promising optical characteristics, but rarely explored until nowadays as up-converting material. Due to the phonon energy of around 475 cm-1, which is lower than in many other compounds commonly used hosts, this one has a great perspective as an optically active material. Here, for the first time two combinations of rare earth dopant ions, Yb3+/Ho3+ and Yb3+/Tm3+, with different mutual ratios were chosen as pairs for inducing up-conversion. Sol-gel assisted combustion synthesis, which comprises citric acid as chelator and glycine as fuel, was used to obtain powdered samples that are subsequently thermally treated for 3.5 h at 1100°C. X-ray powder diffraction analysis (XRPD) was performed to determine crystal structure. Morphology characteristics were observed by scanning and transmission electron microscopy (SEM/TEM). Photoluminescent up-converting properties were measured in function of laser power (976 nm) in order to define optimal doping concentration and upconversion mechanism.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.",
title = "Optically active SrGd2O4 phase: Yb3+/Ho3+ and Yb3+/Tm3+ co-doping",
pages = "76-77",
url = "https://hdl.handle.net/21.15107/rcub_dais_13629"
}

Stamenković, T., Lojpur, V., Radmilović, N., Vuković, M., Dinić, I.,& Mančić, L.. (2022). Optically active SrGd2O4 phase: Yb3+/Ho3+ and Yb3+/Tm3+ co-doping. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.
Belgrade : Serbian Ceramic Society., 76-77.
https://hdl.handle.net/21.15107/rcub_dais_13629

Stamenković T, Lojpur V, Radmilović N, Vuković M, Dinić I, Mančić L. Optically active SrGd2O4 phase: Yb3+/Ho3+ and Yb3+/Tm3+ co-doping. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.. 2022;:76-77.
https://hdl.handle.net/21.15107/rcub_dais_13629 .

Stamenković, Tijana, Lojpur, Vesna, Radmilović, Nadežda, Vuković, Marina, Dinić, Ivana, Mančić, Lidija, "Optically active SrGd2O4 phase: Yb3+/Ho3+ and Yb3+/Tm3+ co-doping" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022. (2022):76-77,
https://hdl.handle.net/21.15107/rcub_dais_13629 .

TY  - CONF
AU  - Dinić, Ivana
AU  - Stamenković, Tijana
AU  - Radmilović, Nadežda
AU  - Vuković, Marina
AU  - Rabasović, Mihailo
AU  - Lojpur, Vesna
AU  - Mančić, Lidija
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5837
AB  - Up-conversion properties of SrGd2O4 nanoparticles co-doped with different Yb3+ and constant Er3+ ions were successfully prepared via sol- gel assisted combustion. Rietveld refinement and scanning/transmission electron microscopy with corresponding energydispersive X-ray spectroscopy revealed that obtained powders are composed of agglomerated nanoparticles with orthorhombic (Pnma) structure that have a uniform distribution of all constituting elements. Photoluminescence measurements implied intensification of the upconversion (UC) emission in the visible part of spectrum with the increase of Yb3+ content, which is followed by a significant change in the green to red ratio. Two-photon UC processes are established as a result of Er3+ f-f electronic transitions: green emission at 523 and 551 nm (2H11/2, 4S3/2 → 4I15/2) as well as a red emission at 661 nm (4F9/2 → 4I15/2). The highest value of absolute quantum efficiency (0.055%) is determined for SrGd2O4 nanoparticles doped with 0.5 at% of Er3+ and co-doped with 5 at% of Yb3+ (λexc=976 nm, power density 200W/cm2).
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.
T1  - Quantum efficiency of up-converting SrGd2O4:Yb,Er nanoparticles
SP  - 59
EP  - 59
UR  - https://hdl.handle.net/21.15107/rcub_dais_13621
ER  - 

@conference{
author = "Dinić, Ivana and Stamenković, Tijana and Radmilović, Nadežda and Vuković, Marina and Rabasović, Mihailo and Lojpur, Vesna and Mančić, Lidija",
year = "2022",
abstract = "Up-conversion properties of SrGd2O4 nanoparticles co-doped with different Yb3+ and constant Er3+ ions were successfully prepared via sol- gel assisted combustion. Rietveld refinement and scanning/transmission electron microscopy with corresponding energydispersive X-ray spectroscopy revealed that obtained powders are composed of agglomerated nanoparticles with orthorhombic (Pnma) structure that have a uniform distribution of all constituting elements. Photoluminescence measurements implied intensification of the upconversion (UC) emission in the visible part of spectrum with the increase of Yb3+ content, which is followed by a significant change in the green to red ratio. Two-photon UC processes are established as a result of Er3+ f-f electronic transitions: green emission at 523 and 551 nm (2H11/2, 4S3/2 → 4I15/2) as well as a red emission at 661 nm (4F9/2 → 4I15/2). The highest value of absolute quantum efficiency (0.055%) is determined for SrGd2O4 nanoparticles doped with 0.5 at% of Er3+ and co-doped with 5 at% of Yb3+ (λexc=976 nm, power density 200W/cm2).",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.",
title = "Quantum efficiency of up-converting SrGd2O4:Yb,Er nanoparticles",
pages = "59-59",
url = "https://hdl.handle.net/21.15107/rcub_dais_13621"
}

Dinić, I., Stamenković, T., Radmilović, N., Vuković, M., Rabasović, M., Lojpur, V.,& Mančić, L.. (2022). Quantum efficiency of up-converting SrGd2O4:Yb,Er nanoparticles. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.
Belgrade : Serbian Ceramic Society., 59-59.
https://hdl.handle.net/21.15107/rcub_dais_13621

Dinić I, Stamenković T, Radmilović N, Vuković M, Rabasović M, Lojpur V, Mančić L. Quantum efficiency of up-converting SrGd2O4:Yb,Er nanoparticles. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.. 2022;:59-59.
https://hdl.handle.net/21.15107/rcub_dais_13621 .

Dinić, Ivana, Stamenković, Tijana, Radmilović, Nadežda, Vuković, Marina, Rabasović, Mihailo, Lojpur, Vesna, Mančić, Lidija, "Quantum efficiency of up-converting SrGd2O4:Yb,Er nanoparticles" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022. (2022):59-59,
https://hdl.handle.net/21.15107/rcub_dais_13621 .

TY  - JOUR
AU  - Gavrilović, T. V.
AU  - Jovanovic, D. J.
AU  - Lojpur, Vesna
AU  - Nikolić, Aleksandar S.
AU  - Dramićanin, Miroslav D.
PY  - 2015
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1967
AB  - In this paper, we studied the effects of Er3+/Yb3+ concentration ratio on structural, morphological and luminescence properties of GdVO4:Er3+/Yb3+ green phosphors prepared by a high-temperature solid state method. The samples with different concentrations (between 0.5 to 2 mol%) of dopant Er3+ emitting ions and different concentrations (between 5 to 20 mol%) of sensitizer ions (Yb3+) were studied. The phosphors were characterized by the X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence spectroscopy. For all samples, XRD diffraction patterns confirmed a formation of a pure GdVO4 phase, while the SEM showed that the materials are comprised of chunks of deformed particles with an average diameter ranging from approximately 2 mu m to 8 mu m. Both, down-conversion and up-conversion emission spectra of GdVO4: Er3+/Yb3+ samples, under near UV and IR excitations, exhibit two strong emission bands in the green spectral region at 525 nm and 552 nm wavelengths corresponding to H-2(11/2) - gt  I-4(15/2) and S-4(3/2) - gt  I-4(15/2) electronic transitions of Er3+ ions. The intensity of the green emission was changed by changing the Er3+/Yb3+ concentration ratio. This dual-mode luminescence makes these materials ideal as green phosphors for a wide variety of applications in the fields of bioanalysis and biomedical.
PB  - Int Inst Science Sintering (I I S S), Belgrade
T2  - Science of Sintering
T1  - Influence of Er3+/Yb3+ Concentration Ratio on the Down-conversion and Up-conversion Luminescence and Lifetime in GdVO4:Er3+/Yb3+ Microcrystals
VL  - 47
IS  - 2
SP  - 221
EP  - 228
DO  - 10.2298/SOS1502221G
ER  - 

@article{
author = "Gavrilović, T. V. and Jovanovic, D. J. and Lojpur, Vesna and Nikolić, Aleksandar S. and Dramićanin, Miroslav D.",
year = "2015",
abstract = "In this paper, we studied the effects of Er3+/Yb3+ concentration ratio on structural, morphological and luminescence properties of GdVO4:Er3+/Yb3+ green phosphors prepared by a high-temperature solid state method. The samples with different concentrations (between 0.5 to 2 mol%) of dopant Er3+ emitting ions and different concentrations (between 5 to 20 mol%) of sensitizer ions (Yb3+) were studied. The phosphors were characterized by the X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence spectroscopy. For all samples, XRD diffraction patterns confirmed a formation of a pure GdVO4 phase, while the SEM showed that the materials are comprised of chunks of deformed particles with an average diameter ranging from approximately 2 mu m to 8 mu m. Both, down-conversion and up-conversion emission spectra of GdVO4: Er3+/Yb3+ samples, under near UV and IR excitations, exhibit two strong emission bands in the green spectral region at 525 nm and 552 nm wavelengths corresponding to H-2(11/2) - gt  I-4(15/2) and S-4(3/2) - gt  I-4(15/2) electronic transitions of Er3+ ions. The intensity of the green emission was changed by changing the Er3+/Yb3+ concentration ratio. This dual-mode luminescence makes these materials ideal as green phosphors for a wide variety of applications in the fields of bioanalysis and biomedical.",
publisher = "Int Inst Science Sintering (I I S S), Belgrade",
journal = "Science of Sintering",
title = "Influence of Er3+/Yb3+ Concentration Ratio on the Down-conversion and Up-conversion Luminescence and Lifetime in GdVO4:Er3+/Yb3+ Microcrystals",
volume = "47",
number = "2",
pages = "221-228",
doi = "10.2298/SOS1502221G"
}

Gavrilović, T. V., Jovanovic, D. J., Lojpur, V., Nikolić, A. S.,& Dramićanin, M. D.. (2015). Influence of Er3+/Yb3+ Concentration Ratio on the Down-conversion and Up-conversion Luminescence and Lifetime in GdVO4:Er3+/Yb3+ Microcrystals. in Science of Sintering
Int Inst Science Sintering (I I S S), Belgrade., 47(2), 221-228.
https://doi.org/10.2298/SOS1502221G

Gavrilović TV, Jovanovic DJ, Lojpur V, Nikolić AS, Dramićanin MD. Influence of Er3+/Yb3+ Concentration Ratio on the Down-conversion and Up-conversion Luminescence and Lifetime in GdVO4:Er3+/Yb3+ Microcrystals. in Science of Sintering. 2015;47(2):221-228.
doi:10.2298/SOS1502221G .

Gavrilović, T. V., Jovanovic, D. J., Lojpur, Vesna, Nikolić, Aleksandar S., Dramićanin, Miroslav D., "Influence of Er3+/Yb3+ Concentration Ratio on the Down-conversion and Up-conversion Luminescence and Lifetime in GdVO4:Er3+/Yb3+ Microcrystals" in Science of Sintering, 47, no. 2 (2015):221-228,
https://doi.org/10.2298/SOS1502221G . .