Defect induced variation in vibrational and optoelectronic properties of nanocrystalline ZnO powders
Abstract
Structural disorder of ZnO nanopowders with mean crystallite size down to 15 nm, produced by mechanical activation in high energy mills, has been analyzed by x-ray diffraction and Raman spectroscopy. The influence of such disorder on optical and electronic properties of activated ZnO nanopowders has been investigated using photoluminescence spectroscopy and spectroscopic ellipsometry. A revised interpretation of the resonant enhancement of the first and second order Raman scattering by the E-1(LO) phonons in highly disorder ZnO nanopowders has been proposed. Detailed analysis of resonant Raman effects in ZnO powders under sub band gap excitation has given valuable information about defect induced electronic states in the band gap of ZnO. Systematic trend in the electron-phonon coupling strength, with the correlation length which depends on lattice disorder in ZnO, has been also demonstrated.
Keywords:
ZnO nanopowder / defect induced electronic states / Raman spectroscopy / photoluminescence / ellipsometrySource:
Journal of Applied Physics, 2011, 109, 3Publisher:
- Amer Inst Physics, Melville
Funding / projects:
- SASA project [F-134]
- Swiss National Science FoundationSwiss National Science Foundation (SNSF)European Commission [IZ73Z0-128169]
- Nanostructured multifunctional materials and nanocomposites (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45018)
- Physics of nanostructured oxide materials and strongly correlated systems (RS-MESTD-Basic Research (BR or ON)-171032)
- Zero- to Three-Dimensional Nanostructures for Application in Electronics and Renewable Energy Sources: Synthesis, Characterization and Processing (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45007)
DOI: 10.1063/1.3525987
ISSN: 0021-8979
WoS: 000287366000087
Scopus: 2-s2.0-79951815073
Collections
Institution/Community
Institut za multidisciplinarna istraživanjaTY - JOUR AU - Šćepanović, Maja AU - Grujic-Brojcin, Mirjana U AU - Vojisavljević, Katarina AU - Srećković, Tatjana PY - 2011 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/471 AB - Structural disorder of ZnO nanopowders with mean crystallite size down to 15 nm, produced by mechanical activation in high energy mills, has been analyzed by x-ray diffraction and Raman spectroscopy. The influence of such disorder on optical and electronic properties of activated ZnO nanopowders has been investigated using photoluminescence spectroscopy and spectroscopic ellipsometry. A revised interpretation of the resonant enhancement of the first and second order Raman scattering by the E-1(LO) phonons in highly disorder ZnO nanopowders has been proposed. Detailed analysis of resonant Raman effects in ZnO powders under sub band gap excitation has given valuable information about defect induced electronic states in the band gap of ZnO. Systematic trend in the electron-phonon coupling strength, with the correlation length which depends on lattice disorder in ZnO, has been also demonstrated. PB - Amer Inst Physics, Melville T2 - Journal of Applied Physics T1 - Defect induced variation in vibrational and optoelectronic properties of nanocrystalline ZnO powders IS - 3 VL - 109 DO - 10.1063/1.3525987 ER -
@article{ author = "Šćepanović, Maja and Grujic-Brojcin, Mirjana U and Vojisavljević, Katarina and Srećković, Tatjana", year = "2011", abstract = "Structural disorder of ZnO nanopowders with mean crystallite size down to 15 nm, produced by mechanical activation in high energy mills, has been analyzed by x-ray diffraction and Raman spectroscopy. The influence of such disorder on optical and electronic properties of activated ZnO nanopowders has been investigated using photoluminescence spectroscopy and spectroscopic ellipsometry. A revised interpretation of the resonant enhancement of the first and second order Raman scattering by the E-1(LO) phonons in highly disorder ZnO nanopowders has been proposed. Detailed analysis of resonant Raman effects in ZnO powders under sub band gap excitation has given valuable information about defect induced electronic states in the band gap of ZnO. Systematic trend in the electron-phonon coupling strength, with the correlation length which depends on lattice disorder in ZnO, has been also demonstrated.", publisher = "Amer Inst Physics, Melville", journal = "Journal of Applied Physics", title = "Defect induced variation in vibrational and optoelectronic properties of nanocrystalline ZnO powders", number = "3", volume = "109", doi = "10.1063/1.3525987" }
Šćepanović, M., Grujic-Brojcin, M. U., Vojisavljević, K.,& Srećković, T.. (2011). Defect induced variation in vibrational and optoelectronic properties of nanocrystalline ZnO powders. in Journal of Applied Physics Amer Inst Physics, Melville., 109(3). https://doi.org/10.1063/1.3525987
Šćepanović M, Grujic-Brojcin MU, Vojisavljević K, Srećković T. Defect induced variation in vibrational and optoelectronic properties of nanocrystalline ZnO powders. in Journal of Applied Physics. 2011;109(3). doi:10.1063/1.3525987 .
Šćepanović, Maja, Grujic-Brojcin, Mirjana U, Vojisavljević, Katarina, Srećković, Tatjana, "Defect induced variation in vibrational and optoelectronic properties of nanocrystalline ZnO powders" in Journal of Applied Physics, 109, no. 3 (2011), https://doi.org/10.1063/1.3525987 . .