Synthesis, structural studies, electrical conductivity and optical properties of new Sb(2-)(x)Ln(x)Te(3) (Ln: Lu3+, Er3+ and Ho3+) nanomaterials

Title
Synthesis, structural studies, electrical conductivity and optical properties of new Sb(2-)(x)Ln(x)Te(3) (Ln: Lu3+, Er3+ and Ho3+) nanomaterials
Author(s)
주상우요네스피로즈살라리A. Alemi[A. Alemi]민봉기
Keywords
PHYSICAL-PROPERTIES; HYDROTHERMAL SYNTHESIS; SINGLE-CRYSTALS; SPECTROSCOPIC PROPERTIES; NANOCRYSTALS; BI2SE3; LUMINESCENCE; NANOFLOWERS; ABSORPTION; MORPHOLOGY
Issue Date
201503
Publisher
TAYLOR & FRANCIS LTD
Citation
JOURNAL OF EXPERIMENTAL NANOSCIENCE, v.10, no.4, pp.274 - 289
Abstract
Ln-doped Sb2Te3 (Ln: Lu3+, Er3+, Ho3+) nanomaterials were synthesised by a co-reduction method in hydrothermal condition. Powder X-ray diffraction (XRD) patterns indicate that the Ln(x)Sb(2-)(x)Te(3) crystals (Ln = Lu3+, x = 0.00-0.06; Er3+ and Ho3+ x = 0.00-0.04) are isostructural with Sb2Te3. The cell parameter a decreases for Ln(x)Sb(2-)(x)Te(3) compounds upon increasing the dopant content (x), while c increases. Scanning electron microscopy and transmission electron microscopy images show that doping of Lu3+ and Ho3+ ions in the lattice of Sb2Te3 results in spherical nanoparticles while that in Er3+ leads to hexagonal nanoplates, respectively. The electrical conductivity of Ln-doped Sb2Te3 is higher than that of pure Sb2Te3 and increases with temperature. By increasing the concentration of Ln(3+) ions, the absorption spectrum of Sb2Te3 shows red shifts and some intensity changes. In addition to the characteristic red emission peaks of Sb2Te3, emission spectra of doped materials show other emission bands originating from f-f transitions of the Ho3+ ions.
URI
http://hdl.handle.net/YU.REPOSITORY/33125http://dx.doi.org/10.1080/17458080.2013.824621
ISSN
1745-8080
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공과대학 > 기계공학부 > Articles
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