NZF-BT COMPOSITES: A PHOTOLUMINESCENCE APPROACH
Аутори
Ferreira Teixeira, GuilherminaDžunuzović, Adis
Lustosa, Glauco
Vijatović Petrović, Mirjana
Stojanović, Biljana
ZAGHETE, MARIA
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Photoluminescence (PL) analysis provide us important information about the structure of materials, however the PL behavior of (x)Ni0.7Zn0.3Fe2O4-(1-x)BaTiO3 ((x)NZF-(1-x)BT) multiferroic composites is not very well know. Based on this, (x)NZF-(1-x)BT powders whit different ratio of NZF/BT (x= 0.1, 0.3, 0.5, 0.7, 0.9) were synthesized by auto-combustion method. After that, the PL property of the composites was explored through measurements carried out using as excitation source a krypton laser with wavelength of 350 nm. The presence of PL emission suggests that the structures of the materials are medium range disordered. Oxygen vacancies (anion vacancies), metal vacancies (cation vacancy) and lattice distortion are responsible by PL emission due to formation of structural defects which are essential to promote the electronic transitions inside band gap. Emission at low energy (green/yellow/red) occurs due to deep defects which modify the Fermi level generating intermediary levels near t...he conduction band. On the other hand, PL emission at high energy region (violet/ blue) is originated by the presence of shallow defects which generate states next to the valence band. In the present work, all samples showed a broad band emission centered around 450 nm (Figure 1), being a region characteristic of contribution of shallow defects for photoluminescence emission. In addition, the PL broad band emission is an evidence of structural disorder in the lattice of materials which promotes the formation of numerous states within the band gap.
Кључне речи:
Photoluminescence / multiferroic composites / auto-combustion method / Oxygen vacancies / (x)Ni0.7Zn0.3Fe2O4-(1-x)BaTiO3 ((x)NZF-(1-x)BT)Извор:
4th Conference of The Serbian Society for Ceramic Materials, June 14-16.2017. Belgrade Serbia, 2017Издавач:
- Institute for Multidisciplinary Research, University of Belgrade Kneza Višeslava 1, 11000 Belgrade, Serbia
Институција/група
Institut za multidisciplinarna istraživanjaTY - CONF AU - Ferreira Teixeira, Guilhermina AU - Džunuzović, Adis AU - Lustosa, Glauco AU - Vijatović Petrović, Mirjana AU - Stojanović, Biljana AU - ZAGHETE, MARIA PY - 2017 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/2633 AB - Photoluminescence (PL) analysis provide us important information about the structure of materials, however the PL behavior of (x)Ni0.7Zn0.3Fe2O4-(1-x)BaTiO3 ((x)NZF-(1-x)BT) multiferroic composites is not very well know. Based on this, (x)NZF-(1-x)BT powders whit different ratio of NZF/BT (x= 0.1, 0.3, 0.5, 0.7, 0.9) were synthesized by auto-combustion method. After that, the PL property of the composites was explored through measurements carried out using as excitation source a krypton laser with wavelength of 350 nm. The presence of PL emission suggests that the structures of the materials are medium range disordered. Oxygen vacancies (anion vacancies), metal vacancies (cation vacancy) and lattice distortion are responsible by PL emission due to formation of structural defects which are essential to promote the electronic transitions inside band gap. Emission at low energy (green/yellow/red) occurs due to deep defects which modify the Fermi level generating intermediary levels near the conduction band. On the other hand, PL emission at high energy region (violet/ blue) is originated by the presence of shallow defects which generate states next to the valence band. In the present work, all samples showed a broad band emission centered around 450 nm (Figure 1), being a region characteristic of contribution of shallow defects for photoluminescence emission. In addition, the PL broad band emission is an evidence of structural disorder in the lattice of materials which promotes the formation of numerous states within the band gap. PB - Institute for Multidisciplinary Research, University of Belgrade Kneza Višeslava 1, 11000 Belgrade, Serbia C3 - 4th Conference of The Serbian Society for Ceramic Materials, June 14-16.2017. Belgrade Serbia T1 - NZF-BT COMPOSITES: A PHOTOLUMINESCENCE APPROACH UR - https://hdl.handle.net/21.15107/rcub_rimsi_2633 ER -
@conference{ author = "Ferreira Teixeira, Guilhermina and Džunuzović, Adis and Lustosa, Glauco and Vijatović Petrović, Mirjana and Stojanović, Biljana and ZAGHETE, MARIA", year = "2017", abstract = "Photoluminescence (PL) analysis provide us important information about the structure of materials, however the PL behavior of (x)Ni0.7Zn0.3Fe2O4-(1-x)BaTiO3 ((x)NZF-(1-x)BT) multiferroic composites is not very well know. Based on this, (x)NZF-(1-x)BT powders whit different ratio of NZF/BT (x= 0.1, 0.3, 0.5, 0.7, 0.9) were synthesized by auto-combustion method. After that, the PL property of the composites was explored through measurements carried out using as excitation source a krypton laser with wavelength of 350 nm. The presence of PL emission suggests that the structures of the materials are medium range disordered. Oxygen vacancies (anion vacancies), metal vacancies (cation vacancy) and lattice distortion are responsible by PL emission due to formation of structural defects which are essential to promote the electronic transitions inside band gap. Emission at low energy (green/yellow/red) occurs due to deep defects which modify the Fermi level generating intermediary levels near the conduction band. On the other hand, PL emission at high energy region (violet/ blue) is originated by the presence of shallow defects which generate states next to the valence band. In the present work, all samples showed a broad band emission centered around 450 nm (Figure 1), being a region characteristic of contribution of shallow defects for photoluminescence emission. In addition, the PL broad band emission is an evidence of structural disorder in the lattice of materials which promotes the formation of numerous states within the band gap.", publisher = "Institute for Multidisciplinary Research, University of Belgrade Kneza Višeslava 1, 11000 Belgrade, Serbia", journal = "4th Conference of The Serbian Society for Ceramic Materials, June 14-16.2017. Belgrade Serbia", title = "NZF-BT COMPOSITES: A PHOTOLUMINESCENCE APPROACH", url = "https://hdl.handle.net/21.15107/rcub_rimsi_2633" }
Ferreira Teixeira, G., Džunuzović, A., Lustosa, G., Vijatović Petrović, M., Stojanović, B.,& ZAGHETE, M.. (2017). NZF-BT COMPOSITES: A PHOTOLUMINESCENCE APPROACH. in 4th Conference of The Serbian Society for Ceramic Materials, June 14-16.2017. Belgrade Serbia Institute for Multidisciplinary Research, University of Belgrade Kneza Višeslava 1, 11000 Belgrade, Serbia.. https://hdl.handle.net/21.15107/rcub_rimsi_2633
Ferreira Teixeira G, Džunuzović A, Lustosa G, Vijatović Petrović M, Stojanović B, ZAGHETE M. NZF-BT COMPOSITES: A PHOTOLUMINESCENCE APPROACH. in 4th Conference of The Serbian Society for Ceramic Materials, June 14-16.2017. Belgrade Serbia. 2017;. https://hdl.handle.net/21.15107/rcub_rimsi_2633 .
Ferreira Teixeira, Guilhermina, Džunuzović, Adis, Lustosa, Glauco, Vijatović Petrović, Mirjana, Stojanović, Biljana, ZAGHETE, MARIA, "NZF-BT COMPOSITES: A PHOTOLUMINESCENCE APPROACH" in 4th Conference of The Serbian Society for Ceramic Materials, June 14-16.2017. Belgrade Serbia (2017), https://hdl.handle.net/21.15107/rcub_rimsi_2633 .