TY  - JOUR
AU  - Hong, Junyu
AU  - Liu, Feilong
AU  - Dramićanin, Miroslav
AU  - Zhou, Lei
AU  - Wu, Mingmei
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11366
AB  - To develop novel luminescent materials for optical temperature measurement, a series of Yb3+- and Er3+-doped Ca3Sc2Si3O12 (CSS) upconversion (UC) phosphors were synthesized by the sol– gel combustion method. The crystal structure, phase purity, and element distribution of the samples were characterized by powder X-ray diffraction and a transmission electron microscope (TEM). The detailed study of the photoluminescence emission spectra of the samples shows that the addition of Yb3+ can greatly enhance the emission of Er3+ by effective energy transfer. The prepared Yb3+ and Er3+ co-doped CSS phosphors exhibit green emission bands near 522 and 555 nm and red emission bands near 658 nm, which correspond to the 2H11/2→4 I15/2, 4S3/2→4 I15/2, and 4F9/2→4 I15/2 transitions of Er3+, respectively. The temperature-dependent behavior of the CSS:0.2Yb3+,0.02Er3+ sample was carefully studied by the fluorescence intensity ratio (FIR) technique. The results indicate the excellent sensitivity of the sample, with a maximum absolute sensitivity of 0.67% K−1 at 500 K and a relative sensitivity of 1.34% K−1 at 300 K. We demonstrate here that the temperature measurement performance of FIR technology using the CSS:Yb3+,Er3+ phosphor is not inferior to that of infrared thermal imaging thermometers. Therefore, CSS:Yb3+,Er3+ phosphors have great potential applications in the field of optical thermometry.
T2  - Nanomaterials
T1  - The Upconversion Luminescence of Ca3Sc2Si3O12:Yb3+,Er3+ and Its Application in Thermometry
VL  - 13
IS  - 13
SP  - 1910
DO  - 10.3390/nano13131910
ER  - 

@article{
author = "Hong, Junyu and Liu, Feilong and Dramićanin, Miroslav and Zhou, Lei and Wu, Mingmei",
year = "2023",
abstract = "To develop novel luminescent materials for optical temperature measurement, a series of Yb3+- and Er3+-doped Ca3Sc2Si3O12 (CSS) upconversion (UC) phosphors were synthesized by the sol– gel combustion method. The crystal structure, phase purity, and element distribution of the samples were characterized by powder X-ray diffraction and a transmission electron microscope (TEM). The detailed study of the photoluminescence emission spectra of the samples shows that the addition of Yb3+ can greatly enhance the emission of Er3+ by effective energy transfer. The prepared Yb3+ and Er3+ co-doped CSS phosphors exhibit green emission bands near 522 and 555 nm and red emission bands near 658 nm, which correspond to the 2H11/2→4 I15/2, 4S3/2→4 I15/2, and 4F9/2→4 I15/2 transitions of Er3+, respectively. The temperature-dependent behavior of the CSS:0.2Yb3+,0.02Er3+ sample was carefully studied by the fluorescence intensity ratio (FIR) technique. The results indicate the excellent sensitivity of the sample, with a maximum absolute sensitivity of 0.67% K−1 at 500 K and a relative sensitivity of 1.34% K−1 at 300 K. We demonstrate here that the temperature measurement performance of FIR technology using the CSS:Yb3+,Er3+ phosphor is not inferior to that of infrared thermal imaging thermometers. Therefore, CSS:Yb3+,Er3+ phosphors have great potential applications in the field of optical thermometry.",
journal = "Nanomaterials",
title = "The Upconversion Luminescence of Ca3Sc2Si3O12:Yb3+,Er3+ and Its Application in Thermometry",
volume = "13",
number = "13",
pages = "1910",
doi = "10.3390/nano13131910"
}

Hong, J., Liu, F., Dramićanin, M., Zhou, L.,& Wu, M.. (2023). The Upconversion Luminescence of Ca3Sc2Si3O12:Yb3+,Er3+ and Its Application in Thermometry. in Nanomaterials, 13(13), 1910.
https://doi.org/10.3390/nano13131910

Hong J, Liu F, Dramićanin M, Zhou L, Wu M. The Upconversion Luminescence of Ca3Sc2Si3O12:Yb3+,Er3+ and Its Application in Thermometry. in Nanomaterials. 2023;13(13):1910.
doi:10.3390/nano13131910 .

Hong, Junyu, Liu, Feilong, Dramićanin, Miroslav, Zhou, Lei, Wu, Mingmei, "The Upconversion Luminescence of Ca3Sc2Si3O12:Yb3+,Er3+ and Its Application in Thermometry" in Nanomaterials, 13, no. 13 (2023):1910,
https://doi.org/10.3390/nano13131910 . .

TY  - JOUR
AU  - Liu, Feilong
AU  - Yingyuan, Chen
AU  - Milićević, Bojana R.
AU  - Jiang, Chunyan
AU  - Huang, Senchuan
AU  - Zhou, Lei
AU  - Zhou, Jianbang
AU  - Wu, Mingmei
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10605
AB  - A facile strategy to modify the surface of K2SiF6:Mn4+ (KSFM) with commercially available hydrophilic hydroquinone (HQ) has been developed and waterproof stability (moisture resistance) of the KSFM has been significantly improved. It has been demonstrated that there are strong interactions between KSFM and HQ on the interface due to the hydrogen bonds of fluorine in KSFM with hydrogen in HQ. The relative luminous intensity of HQ-modified KSFM (denoted as KSFM-HQ) remained 99.7% of its initial value after immersion in water for 336 h, remarkable higher than that of KSFM which remained only 38.0%. It is proposed that the high water resistance of KSFM-HQ is achieved via two possible mechanisms: in situ decomposition of dark brown manganese (owing to the hydrolysis of [MnF6]2−) on the KSFM crystal surface and consequently the formation of a more protective Mn4+-free layer. The process effectively combines the advantages of transparent organic materials (herein HQ) before immersion in water and durable moisture resistance of inorganic materials (herein K2SiF6) on surface after immersion in water. The importance of HQ loading on moisture-sensitive fluoride phosphors has been further confirmed by using HQ-treated K2GeF6:Mn4+ (KGFM) as an additional example. This strategy provides a one-of-a-kind way to the development of water-resistant Mn4+-doped fluoride phosphors with high luminous stability for potential applications in water-borne fluorescent anti-counterfeiting ink and even warm WLEDs operating in high humidity. © 2023
T2  - Colloids and Surfaces. A: Physicochemical and Engineering Aspects
T1  - Hydroquinone-modified Mn4+-activated fluoride red phosphors with improved water-resistance
VL  - 661
DO  - 10.1016/j.colsurfa.2023.130954
ER  - 

@article{
author = "Liu, Feilong and Yingyuan, Chen and Milićević, Bojana R. and Jiang, Chunyan and Huang, Senchuan and Zhou, Lei and Zhou, Jianbang and Wu, Mingmei",
year = "2023",
abstract = "A facile strategy to modify the surface of K2SiF6:Mn4+ (KSFM) with commercially available hydrophilic hydroquinone (HQ) has been developed and waterproof stability (moisture resistance) of the KSFM has been significantly improved. It has been demonstrated that there are strong interactions between KSFM and HQ on the interface due to the hydrogen bonds of fluorine in KSFM with hydrogen in HQ. The relative luminous intensity of HQ-modified KSFM (denoted as KSFM-HQ) remained 99.7% of its initial value after immersion in water for 336 h, remarkable higher than that of KSFM which remained only 38.0%. It is proposed that the high water resistance of KSFM-HQ is achieved via two possible mechanisms: in situ decomposition of dark brown manganese (owing to the hydrolysis of [MnF6]2−) on the KSFM crystal surface and consequently the formation of a more protective Mn4+-free layer. The process effectively combines the advantages of transparent organic materials (herein HQ) before immersion in water and durable moisture resistance of inorganic materials (herein K2SiF6) on surface after immersion in water. The importance of HQ loading on moisture-sensitive fluoride phosphors has been further confirmed by using HQ-treated K2GeF6:Mn4+ (KGFM) as an additional example. This strategy provides a one-of-a-kind way to the development of water-resistant Mn4+-doped fluoride phosphors with high luminous stability for potential applications in water-borne fluorescent anti-counterfeiting ink and even warm WLEDs operating in high humidity. © 2023",
journal = "Colloids and Surfaces. A: Physicochemical and Engineering Aspects",
title = "Hydroquinone-modified Mn4+-activated fluoride red phosphors with improved water-resistance",
volume = "661",
doi = "10.1016/j.colsurfa.2023.130954"
}

Liu, F., Yingyuan, C., Milićević, B. R., Jiang, C., Huang, S., Zhou, L., Zhou, J.,& Wu, M.. (2023). Hydroquinone-modified Mn4+-activated fluoride red phosphors with improved water-resistance. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 661.
https://doi.org/10.1016/j.colsurfa.2023.130954

Liu F, Yingyuan C, Milićević BR, Jiang C, Huang S, Zhou L, Zhou J, Wu M. Hydroquinone-modified Mn4+-activated fluoride red phosphors with improved water-resistance. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects. 2023;661.
doi:10.1016/j.colsurfa.2023.130954 .

Liu, Feilong, Yingyuan, Chen, Milićević, Bojana R., Jiang, Chunyan, Huang, Senchuan, Zhou, Lei, Zhou, Jianbang, Wu, Mingmei, "Hydroquinone-modified Mn4+-activated fluoride red phosphors with improved water-resistance" in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 661 (2023),
https://doi.org/10.1016/j.colsurfa.2023.130954 . .

TY  - JOUR
AU  - Zhou, Jianbang
AU  - Liu, Feilong
AU  - Li, Junhao
AU  - Milićević, Bojana R.
AU  - Yan, Jing
AU  - Wu, Zhanchao
AU  - Wu, Mingmei
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9798
AB  - Mn4+-activated fluorides rank among the most significant red phosphors for white light emitting diodes (LEDs) with enhanced color rendition, while their poor moisture resistance hinders further application. Surface coating with a protective layer is general approach to improving moisture resistance. However, these methods usually suffer from complex post-processing and poor shell stability. Herein, the introduction of passivation ions (Nb5+) may suppress the hydrolysis of [MnF6]2–, which provides a facile approach to obtaining moisture-resistant fluoride phosphors. Compared to K2TiF6:5.0%Mn4+, the moisture resistance and luminescence intensity of K2Ti0.949Nb0.051F6.051:5.0%Mn4+ improved significantly following the addition of Nb5+. In addition, the combination of as-prepared K2Ti0.949Nb0.051F6.051:5.0%Mn4+ red phosphor, YAG:Ce yellow phosphor and blue-chip enables the production of warm white LEDs with excellent color rendition (Ra = 90.2), low correlated color temperature (CCT = 3816 K), and high luminous efficacy (132.2 lm/W). © 2021
T2  - Optical Materials
T1  - A facile self-passivation strategy for improving moisture-resistance of fluoride red phosphors without surface modification
VL  - 117
DO  - 10.1016/j.optmat.2021.111184
ER  - 

@article{
author = "Zhou, Jianbang and Liu, Feilong and Li, Junhao and Milićević, Bojana R. and Yan, Jing and Wu, Zhanchao and Wu, Mingmei",
year = "2021",
abstract = "Mn4+-activated fluorides rank among the most significant red phosphors for white light emitting diodes (LEDs) with enhanced color rendition, while their poor moisture resistance hinders further application. Surface coating with a protective layer is general approach to improving moisture resistance. However, these methods usually suffer from complex post-processing and poor shell stability. Herein, the introduction of passivation ions (Nb5+) may suppress the hydrolysis of [MnF6]2–, which provides a facile approach to obtaining moisture-resistant fluoride phosphors. Compared to K2TiF6:5.0%Mn4+, the moisture resistance and luminescence intensity of K2Ti0.949Nb0.051F6.051:5.0%Mn4+ improved significantly following the addition of Nb5+. In addition, the combination of as-prepared K2Ti0.949Nb0.051F6.051:5.0%Mn4+ red phosphor, YAG:Ce yellow phosphor and blue-chip enables the production of warm white LEDs with excellent color rendition (Ra = 90.2), low correlated color temperature (CCT = 3816 K), and high luminous efficacy (132.2 lm/W). © 2021",
journal = "Optical Materials",
title = "A facile self-passivation strategy for improving moisture-resistance of fluoride red phosphors without surface modification",
volume = "117",
doi = "10.1016/j.optmat.2021.111184"
}

Zhou, J., Liu, F., Li, J., Milićević, B. R., Yan, J., Wu, Z.,& Wu, M.. (2021). A facile self-passivation strategy for improving moisture-resistance of fluoride red phosphors without surface modification. in Optical Materials, 117.
https://doi.org/10.1016/j.optmat.2021.111184

Zhou J, Liu F, Li J, Milićević BR, Yan J, Wu Z, Wu M. A facile self-passivation strategy for improving moisture-resistance of fluoride red phosphors without surface modification. in Optical Materials. 2021;117.
doi:10.1016/j.optmat.2021.111184 .

Zhou, Jianbang, Liu, Feilong, Li, Junhao, Milićević, Bojana R., Yan, Jing, Wu, Zhanchao, Wu, Mingmei, "A facile self-passivation strategy for improving moisture-resistance of fluoride red phosphors without surface modification" in Optical Materials, 117 (2021),
https://doi.org/10.1016/j.optmat.2021.111184 . .

TY  - JOUR
AU  - Wang, Y.
AU  - Chen, Wenbo
AU  - Liu, Feilong
AU  - Yang, D. W.
AU  - Tian, Ya
AU  - Ma, Chong-Geng
AU  - Dramićanin, Miroslav
AU  - Brik, Mikhail G.
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S2211379719305327
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8091
AB  - Modern methods of theoretical and experimental materials engineering can be greatly facilitated by reliably established guiding trends that set directions for a smart search for new materials with enhanced performance. Those trends can be derived from a thorough analysis of large arrays of the experimental data, obtained both experimentally and theoretically. In the present paper, the structural, elastic, and electronic properties of 30 spinel compounds AB 2 X 4 (A = Be, Mg, Ca, Sr, Ba; B = Al, Ga, In; X = O, S) were investigated using the CRYSTAL14 program. For the first time the lattice constants, bulk moduli, band gaps and density of states for these 30 spinels were systematically calculated and analyzed. Influence of the cation and anion variation on the above-mentioned properties was highlighted. Several relations between lattice constants, bulk modulus and ionic radii, electronegativities of constituting ions were found. Several linear equations are proposed, which provide a convenient way to predict the lattice constants and bulk moduli of isostructural spinels. © 2019
T2  - Results in Physics
T1  - High-throughput first-principles calculations as a powerful guiding tool for materials engineering: Case study of the AB2X4 (A = Be, Mg, Ca, Sr, ba; B = Al, Ga, in; X = O, S) spinel compounds
VL  - 13
SP  - 102180
DO  - 10.1016/j.rinp.2019.102180
ER  - 

@article{
author = "Wang, Y. and Chen, Wenbo and Liu, Feilong and Yang, D. W. and Tian, Ya and Ma, Chong-Geng and Dramićanin, Miroslav and Brik, Mikhail G.",
year = "2019",
abstract = "Modern methods of theoretical and experimental materials engineering can be greatly facilitated by reliably established guiding trends that set directions for a smart search for new materials with enhanced performance. Those trends can be derived from a thorough analysis of large arrays of the experimental data, obtained both experimentally and theoretically. In the present paper, the structural, elastic, and electronic properties of 30 spinel compounds AB 2 X 4 (A = Be, Mg, Ca, Sr, Ba; B = Al, Ga, In; X = O, S) were investigated using the CRYSTAL14 program. For the first time the lattice constants, bulk moduli, band gaps and density of states for these 30 spinels were systematically calculated and analyzed. Influence of the cation and anion variation on the above-mentioned properties was highlighted. Several relations between lattice constants, bulk modulus and ionic radii, electronegativities of constituting ions were found. Several linear equations are proposed, which provide a convenient way to predict the lattice constants and bulk moduli of isostructural spinels. © 2019",
journal = "Results in Physics",
title = "High-throughput first-principles calculations as a powerful guiding tool for materials engineering: Case study of the AB2X4 (A = Be, Mg, Ca, Sr, ba; B = Al, Ga, in; X = O, S) spinel compounds",
volume = "13",
pages = "102180",
doi = "10.1016/j.rinp.2019.102180"
}

Wang, Y., Chen, W., Liu, F., Yang, D. W., Tian, Y., Ma, C., Dramićanin, M.,& Brik, M. G.. (2019). High-throughput first-principles calculations as a powerful guiding tool for materials engineering: Case study of the AB2X4 (A = Be, Mg, Ca, Sr, ba; B = Al, Ga, in; X = O, S) spinel compounds. in Results in Physics, 13, 102180.
https://doi.org/10.1016/j.rinp.2019.102180

Wang Y, Chen W, Liu F, Yang DW, Tian Y, Ma C, Dramićanin M, Brik MG. High-throughput first-principles calculations as a powerful guiding tool for materials engineering: Case study of the AB2X4 (A = Be, Mg, Ca, Sr, ba; B = Al, Ga, in; X = O, S) spinel compounds. in Results in Physics. 2019;13:102180.
doi:10.1016/j.rinp.2019.102180 .

Wang, Y., Chen, Wenbo, Liu, Feilong, Yang, D. W., Tian, Ya, Ma, Chong-Geng, Dramićanin, Miroslav, Brik, Mikhail G., "High-throughput first-principles calculations as a powerful guiding tool for materials engineering: Case study of the AB2X4 (A = Be, Mg, Ca, Sr, ba; B = Al, Ga, in; X = O, S) spinel compounds" in Results in Physics, 13 (2019):102180,
https://doi.org/10.1016/j.rinp.2019.102180 . .