Strong emission via up-conversion of Gd2O3:Yb3+, Ho3+ nanopowders co-doped with alkali metals ions
Нема приказа
Аутори
Antić, ŽeljkaLojpur, Vesna
Nikoic, Marko G.
Đorđević, Vesna R.
Ahrenkiel, Scott Phillip
Dramićanin, Miroslav
Чланак у часопису
Метаподаци
Приказ свих података о документуАпстракт
Gadolinium-oxide nanopowders doped with Yb3+ and Ho3+ ions and co-doped with alkali metal ions (Li+ and Na+) were synthesized via the polymer complex solution method and their up-conversion emission properties are analyzed. Prepared powders were well crystallized in cubic bixbyite structure, without any impurity phases and with an average crystallite size of about 25 nm, as shown by X-ray powder diffraction analysis. No adsorbed species on the surface of nanoparticles were detected by infrared measurements. The particle morphology was analyzed by transmission electron microscopy, which revealed agglomerated crystalline nanoparticles with irregular, polygonal-like shapes, having a size in the range from 30 to 50 nm. Up-conversion emission properties of Gd2O3:Ho3+,Yb3+ nanopowders were evaluated from photoluminescence emission and decay measurements using 980 nm excitation. Two-photon up-conversion processes produced emissions in visible - near infrared spectral range, with the strongest... green emission from F-5(4),S-5(2)- GT I-5(8) Ho3+ electronic transition, and weak red and near infrared from F-5(5)- GT I-5(8) and F-5(4), S-5(2) - GT I-5(7) transitions, respectively. In addition, three-photon up-conversion emission was detected in ultra-violet-blue spectral region ((5)G(4)- GT I-5(8), D-3(3)- GT I-5(6) and (5)G(5)- GT I-5(8) transitions). Luminescence measurements were performed on samples with different Ho3+ (0.5 and 1 at%) and Yb3+ (2, 4 and 6 at%) concentrations to find that 0.5 at% of Ho3+ and 2 at% of Yb3+ provides the most intense up-conversion emission. The influence of alkali metal (Li+ and Na+) ion co-doping is studied on the sample that showed the most intense up-conversion emission. Increase in the intensity of up-conversion emission is observed for both Li+ and Na+ co-doping. The effect is more pronounced with Li, where addition of 5 at% of Li+ led to more than one order of magnitude emission enhancement. Alkali metal ion co-doping also significantly improved up-conversion color purity through considerably larger increase of green emission compared to red and near infrared. (C) 2013 Elsevier B.V. All rights reserved.
Кључне речи:
Up-conversion / Gd2O3 / Combustion / Yb / Ho / Alkali metal ions co-dopingИзвор:
Journal of Luminescence, 2014, 145, 466-472Финансирање / пројекти:
- Материјали редуковане димензионалности за ефикасну апсорпцију светлости и конверзију енергије (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45020)
- Физика аморфних и наноструктурних материјала (RS-MESTD-Basic Research (BR or ON)-171022)
DOI: 10.1016/j.jlumin.2013.08.007
ISSN: 0022-2313; 1872-7883
WoS: 000330821200076
Scopus: 2-s2.0-84883520951
Колекције
Институција/група
VinčaTY - JOUR AU - Antić, Željka AU - Lojpur, Vesna AU - Nikoic, Marko G. AU - Đorđević, Vesna R. AU - Ahrenkiel, Scott Phillip AU - Dramićanin, Miroslav PY - 2014 UR - https://vinar.vin.bg.ac.rs/handle/123456789/5867 AB - Gadolinium-oxide nanopowders doped with Yb3+ and Ho3+ ions and co-doped with alkali metal ions (Li+ and Na+) were synthesized via the polymer complex solution method and their up-conversion emission properties are analyzed. Prepared powders were well crystallized in cubic bixbyite structure, without any impurity phases and with an average crystallite size of about 25 nm, as shown by X-ray powder diffraction analysis. No adsorbed species on the surface of nanoparticles were detected by infrared measurements. The particle morphology was analyzed by transmission electron microscopy, which revealed agglomerated crystalline nanoparticles with irregular, polygonal-like shapes, having a size in the range from 30 to 50 nm. Up-conversion emission properties of Gd2O3:Ho3+,Yb3+ nanopowders were evaluated from photoluminescence emission and decay measurements using 980 nm excitation. Two-photon up-conversion processes produced emissions in visible - near infrared spectral range, with the strongest green emission from F-5(4),S-5(2)- GT I-5(8) Ho3+ electronic transition, and weak red and near infrared from F-5(5)- GT I-5(8) and F-5(4), S-5(2) - GT I-5(7) transitions, respectively. In addition, three-photon up-conversion emission was detected in ultra-violet-blue spectral region ((5)G(4)- GT I-5(8), D-3(3)- GT I-5(6) and (5)G(5)- GT I-5(8) transitions). Luminescence measurements were performed on samples with different Ho3+ (0.5 and 1 at%) and Yb3+ (2, 4 and 6 at%) concentrations to find that 0.5 at% of Ho3+ and 2 at% of Yb3+ provides the most intense up-conversion emission. The influence of alkali metal (Li+ and Na+) ion co-doping is studied on the sample that showed the most intense up-conversion emission. Increase in the intensity of up-conversion emission is observed for both Li+ and Na+ co-doping. The effect is more pronounced with Li, where addition of 5 at% of Li+ led to more than one order of magnitude emission enhancement. Alkali metal ion co-doping also significantly improved up-conversion color purity through considerably larger increase of green emission compared to red and near infrared. (C) 2013 Elsevier B.V. All rights reserved. T2 - Journal of Luminescence T1 - Strong emission via up-conversion of Gd2O3:Yb3+, Ho3+ nanopowders co-doped with alkali metals ions VL - 145 SP - 466 EP - 472 DO - 10.1016/j.jlumin.2013.08.007 ER -
@article{ author = "Antić, Željka and Lojpur, Vesna and Nikoic, Marko G. and Đorđević, Vesna R. and Ahrenkiel, Scott Phillip and Dramićanin, Miroslav", year = "2014", abstract = "Gadolinium-oxide nanopowders doped with Yb3+ and Ho3+ ions and co-doped with alkali metal ions (Li+ and Na+) were synthesized via the polymer complex solution method and their up-conversion emission properties are analyzed. Prepared powders were well crystallized in cubic bixbyite structure, without any impurity phases and with an average crystallite size of about 25 nm, as shown by X-ray powder diffraction analysis. No adsorbed species on the surface of nanoparticles were detected by infrared measurements. The particle morphology was analyzed by transmission electron microscopy, which revealed agglomerated crystalline nanoparticles with irregular, polygonal-like shapes, having a size in the range from 30 to 50 nm. Up-conversion emission properties of Gd2O3:Ho3+,Yb3+ nanopowders were evaluated from photoluminescence emission and decay measurements using 980 nm excitation. Two-photon up-conversion processes produced emissions in visible - near infrared spectral range, with the strongest green emission from F-5(4),S-5(2)- GT I-5(8) Ho3+ electronic transition, and weak red and near infrared from F-5(5)- GT I-5(8) and F-5(4), S-5(2) - GT I-5(7) transitions, respectively. In addition, three-photon up-conversion emission was detected in ultra-violet-blue spectral region ((5)G(4)- GT I-5(8), D-3(3)- GT I-5(6) and (5)G(5)- GT I-5(8) transitions). Luminescence measurements were performed on samples with different Ho3+ (0.5 and 1 at%) and Yb3+ (2, 4 and 6 at%) concentrations to find that 0.5 at% of Ho3+ and 2 at% of Yb3+ provides the most intense up-conversion emission. The influence of alkali metal (Li+ and Na+) ion co-doping is studied on the sample that showed the most intense up-conversion emission. Increase in the intensity of up-conversion emission is observed for both Li+ and Na+ co-doping. The effect is more pronounced with Li, where addition of 5 at% of Li+ led to more than one order of magnitude emission enhancement. Alkali metal ion co-doping also significantly improved up-conversion color purity through considerably larger increase of green emission compared to red and near infrared. (C) 2013 Elsevier B.V. All rights reserved.", journal = "Journal of Luminescence", title = "Strong emission via up-conversion of Gd2O3:Yb3+, Ho3+ nanopowders co-doped with alkali metals ions", volume = "145", pages = "466-472", doi = "10.1016/j.jlumin.2013.08.007" }
Antić, Ž., Lojpur, V., Nikoic, M. G., Đorđević, V. R., Ahrenkiel, S. P.,& Dramićanin, M.. (2014). Strong emission via up-conversion of Gd2O3:Yb3+, Ho3+ nanopowders co-doped with alkali metals ions. in Journal of Luminescence, 145, 466-472. https://doi.org/10.1016/j.jlumin.2013.08.007
Antić Ž, Lojpur V, Nikoic MG, Đorđević VR, Ahrenkiel SP, Dramićanin M. Strong emission via up-conversion of Gd2O3:Yb3+, Ho3+ nanopowders co-doped with alkali metals ions. in Journal of Luminescence. 2014;145:466-472. doi:10.1016/j.jlumin.2013.08.007 .
Antić, Željka, Lojpur, Vesna, Nikoic, Marko G., Đorđević, Vesna R., Ahrenkiel, Scott Phillip, Dramićanin, Miroslav, "Strong emission via up-conversion of Gd2O3:Yb3+, Ho3+ nanopowders co-doped with alkali metals ions" in Journal of Luminescence, 145 (2014):466-472, https://doi.org/10.1016/j.jlumin.2013.08.007 . .