Variable energy gap of SiCN nanopowders
Само за регистроване кориснике
2006
Аутори
Dohčević-Mitrović, ZoranaMilutinović, Aleksandra N.
Popović, Dragan A.
Vasiljević-Radović, Dana
Popović, Zoran V.
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
SiCN and SiC nanopowders were prepared by infrared laser pyrolysis of gaseous precursors starting from a SiH4C2H2NH3 gas mixture. The SiCN powders were composed of an amorphous phase ascribed to the ternary compound with a β-SiC crystalline phase, while the SiC powders consisted of β phase only. The chemical bonding and the local atomic order in the SiCN powders are much more complicated than those of pure SiCSi3N4 mixtures and are strongly dependent on the variation in the initial gas composition. The average grain size was estimated from X-raydiffraction (XRD) patterns and atomic force microscopy (AFM). The UV-VIS transmittance data were used for the bandgap determination in these new materials. Absorption studies suggested that the direct energy gap is more favourable in SiCN and SiC nanoparticles and is blueshifted with regard to the crystalline bulk (SiC). The change of type of band-to-band transition in SiC nanopowders, due to the size effects, and increasing of the energy gap va...lue in SiCN powders with different local atomic arrangement, makes them attractive for blue-UV optoelectronic applications.
Кључне речи:
SiCN / SiC / nanopowdersИзвор:
Applied Physics A: Materials Science and Processing, 2006, 84, 197-202Издавач:
- Springer
DOI: 10.1007/s00339-006-3598-9
ISSN: 0947-8396
WoS: 000237499700030
Scopus: 2-s2.0-33646677500
Институција/група
IHTMTY - JOUR AU - Dohčević-Mitrović, Zorana AU - Milutinović, Aleksandra N. AU - Popović, Dragan A. AU - Vasiljević-Radović, Dana AU - Popović, Zoran V. PY - 2006 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/7486 AB - SiCN and SiC nanopowders were prepared by infrared laser pyrolysis of gaseous precursors starting from a SiH4C2H2NH3 gas mixture. The SiCN powders were composed of an amorphous phase ascribed to the ternary compound with a β-SiC crystalline phase, while the SiC powders consisted of β phase only. The chemical bonding and the local atomic order in the SiCN powders are much more complicated than those of pure SiCSi3N4 mixtures and are strongly dependent on the variation in the initial gas composition. The average grain size was estimated from X-raydiffraction (XRD) patterns and atomic force microscopy (AFM). The UV-VIS transmittance data were used for the bandgap determination in these new materials. Absorption studies suggested that the direct energy gap is more favourable in SiCN and SiC nanoparticles and is blueshifted with regard to the crystalline bulk (SiC). The change of type of band-to-band transition in SiC nanopowders, due to the size effects, and increasing of the energy gap value in SiCN powders with different local atomic arrangement, makes them attractive for blue-UV optoelectronic applications. PB - Springer T2 - Applied Physics A: Materials Science and Processing T1 - Variable energy gap of SiCN nanopowders VL - 84 SP - 197 EP - 202 DO - 10.1007/s00339-006-3598-9 ER -
@article{ author = "Dohčević-Mitrović, Zorana and Milutinović, Aleksandra N. and Popović, Dragan A. and Vasiljević-Radović, Dana and Popović, Zoran V.", year = "2006", abstract = "SiCN and SiC nanopowders were prepared by infrared laser pyrolysis of gaseous precursors starting from a SiH4C2H2NH3 gas mixture. The SiCN powders were composed of an amorphous phase ascribed to the ternary compound with a β-SiC crystalline phase, while the SiC powders consisted of β phase only. The chemical bonding and the local atomic order in the SiCN powders are much more complicated than those of pure SiCSi3N4 mixtures and are strongly dependent on the variation in the initial gas composition. The average grain size was estimated from X-raydiffraction (XRD) patterns and atomic force microscopy (AFM). The UV-VIS transmittance data were used for the bandgap determination in these new materials. Absorption studies suggested that the direct energy gap is more favourable in SiCN and SiC nanoparticles and is blueshifted with regard to the crystalline bulk (SiC). The change of type of band-to-band transition in SiC nanopowders, due to the size effects, and increasing of the energy gap value in SiCN powders with different local atomic arrangement, makes them attractive for blue-UV optoelectronic applications.", publisher = "Springer", journal = "Applied Physics A: Materials Science and Processing", title = "Variable energy gap of SiCN nanopowders", volume = "84", pages = "197-202", doi = "10.1007/s00339-006-3598-9" }
Dohčević-Mitrović, Z., Milutinović, A. N., Popović, D. A., Vasiljević-Radović, D.,& Popović, Z. V.. (2006). Variable energy gap of SiCN nanopowders. in Applied Physics A: Materials Science and Processing Springer., 84, 197-202. https://doi.org/10.1007/s00339-006-3598-9
Dohčević-Mitrović Z, Milutinović AN, Popović DA, Vasiljević-Radović D, Popović ZV. Variable energy gap of SiCN nanopowders. in Applied Physics A: Materials Science and Processing. 2006;84:197-202. doi:10.1007/s00339-006-3598-9 .
Dohčević-Mitrović, Zorana, Milutinović, Aleksandra N., Popović, Dragan A., Vasiljević-Radović, Dana, Popović, Zoran V., "Variable energy gap of SiCN nanopowders" in Applied Physics A: Materials Science and Processing, 84 (2006):197-202, https://doi.org/10.1007/s00339-006-3598-9 . .