Journal
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
Volume 25, Issue 4, Pages 300-309Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.pnsc.2015.08.003
Keywords
II-VI Semiconductors; Infrared spectra; Raman spectra; Optical properties of low-dimensional; Mesoscopic; Nanoscale materials and structures
Funding
- Department of Science and Technology (DST), India [120042]
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Influence of nitrogen doping on structural and optical properties of ZnO nanoparticles has been studied. Undoped and N doped ZnO nanoparticles were synthesized via chemical precipitation approach. The prepared samples were characterized through X-ray diffraction (XRD), Transmission electron microscopy (TEM) equipped with Energy dispersive X-ray (EDAX) spectroscopy, UV visible spectroscopy, Fourier transform infrared (FTIR) spectroscopy and tnicro-Raman spectroscopy (mu RS). Wurtzite phase of undoped as well as 0.5-10% N doped ZnO nanoparticles was confirmed through characteristic XRD patterns. The particle size expansion due to N incorporation in ZnO was further revealed by TEM and EDAX analysis where 11 nm size undoped and 18-22 ntn size 0.5-10% N doped ZnO (N:ZnO) nanoparticles without any impurity were ascertained. Slight blue-shift in band gap energy, as observed in our case, symbolized weak quantum confinement of the prepared nanoparticles. The alterations in vibrational modes of ZnO due to N incorporation, remarkably II substituting at 0 site and subsequently causing the passivation in N:ZnO nanoparticles, were detected through FTIR analysis. Finally, the effect of the nano-size of crystallite and gradual prominence of N into ZnO lattice due to increase of N doping concentration in prepared nanoparticles was meticulously expatiated though mu RS analysis. (C) 2015 Chinese Materials Research Society. Published by Elsevier GmbH.
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