TY - JOUR
T1 - Synthesis and optical properties of nanocrystalline V-doped ZnO powders
AU - Maensiri, Santi
AU - Masingboon, Chivalrat
AU - Promarak, Vinich
AU - Seraphin, Supapan
N1 - Funding Information:
The authors would like to thank the Department of Chemistry for providing FTIR and UV–VIS-NIR facilities and the Faculty of Science Electron Microscopy Unit for providing SEM facilities. This work is supported by the Integrated Nanotechnology Research Center (INRC) and the Postgraduate Education Development (PED) in Physics Program, The Commission on Higher Education, The Ministry of Education, Thailand.
PY - 2007/8
Y1 - 2007/8
N2 - This paper reports the synthesis and optical properties of nanocrystalline powders of V-doped ZnO (i.e. Zn0.95V0.05O, Zn0.90V0.10O, and Zn0.85V0.15O) by a simple sol-gel method using metal acetylacetonates of Zn and V and poly(vinyl alcohol) as precursors. Structure of the prepared samples was studied by X-ray diffraction, FTIR spectroscopy, and selected-area electron diffraction (SAED) analysis. The morphology of the powders revealed by SEM and TEM was affected by the amount of V, causing the formations of both nanoparticles and nanorods in the Zn0.95V0.05O sample, nanorods in the Zn0.90V0.10O sample, and nanoparticles in the Zn0.85V0.15O sample. The optical properties of the samples were investigated by measuring the UV-VIS absorbance and photoluminescence spectra at room temperature. All the samples exhibited UV absorption at below 400 nm (3.10 eV) with a well-defined absorbance peak at around 364 nm (3.41 eV) and 288 nm (4.31 eV). The band gap of the V-doped samples shows a decrease with increasing V concentration. The photoluminescence spectra of all the samples showed a strong UV emission band at ∼2.98 eV, a weak blue band at 2.82 eV, a week blue-green band at 2.56 eV, and a weak green band at 2.34 eV, which indicated their high structural and optical quality.
AB - This paper reports the synthesis and optical properties of nanocrystalline powders of V-doped ZnO (i.e. Zn0.95V0.05O, Zn0.90V0.10O, and Zn0.85V0.15O) by a simple sol-gel method using metal acetylacetonates of Zn and V and poly(vinyl alcohol) as precursors. Structure of the prepared samples was studied by X-ray diffraction, FTIR spectroscopy, and selected-area electron diffraction (SAED) analysis. The morphology of the powders revealed by SEM and TEM was affected by the amount of V, causing the formations of both nanoparticles and nanorods in the Zn0.95V0.05O sample, nanorods in the Zn0.90V0.10O sample, and nanoparticles in the Zn0.85V0.15O sample. The optical properties of the samples were investigated by measuring the UV-VIS absorbance and photoluminescence spectra at room temperature. All the samples exhibited UV absorption at below 400 nm (3.10 eV) with a well-defined absorbance peak at around 364 nm (3.41 eV) and 288 nm (4.31 eV). The band gap of the V-doped samples shows a decrease with increasing V concentration. The photoluminescence spectra of all the samples showed a strong UV emission band at ∼2.98 eV, a weak blue band at 2.82 eV, a week blue-green band at 2.56 eV, and a weak green band at 2.34 eV, which indicated their high structural and optical quality.
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U2 - 10.1016/j.optmat.2006.09.011
DO - 10.1016/j.optmat.2006.09.011
M3 - Article
AN - SCOPUS:34250789210
VL - 29
SP - 1700
EP - 1705
JO - Optical Materials
JF - Optical Materials
SN - 0925-3467
IS - 12
ER -