مقاله Structure and Optical Properties of CeO2 Nanoparticles Synthesized by Precipitation : تی پی بین

خلاصه مقاله

Cerium dioxide (CeO₂) has special electrical and optical properties, and chemical and thermal stability. It has been used in semiconductor devices and as a luminescent material. In this work, CeO₂ nanoparticles were synthesized by the precipitation method and the product annealed at various temperatures. Thermogravimetric analysis (TGA)/differential scanning calorimetry (DSC) results show that the optimum annealing temperature for fabrication of CeO₂nanoparticles is greater than 500°C. When the calcination temperature is increased from 550°C to 1050°C, Fourier-transform infrared (FTIR) results show that the water and impurities are almost completely removed, after calcination at 750°C. The x-ray diffraction (XRD) results suggest that the synthesized CeO₂ exhibits a cubic fluorite structure. The crystallite size of the CeO₂ increases from 8 nm to 75 nm when the calcination temperature is increased from 550°C to 1050°C. The absorption spectrum in the ultraviolet (UV) region from 372 nm to 395 nm demonstrates their applicability as UV-filter materials, and the shift of the estimated E _g,eff from 3.21 eV to 3.65 eV demonstrates their applicability in photoelectric devices. CeO₂would be potentially important for applications such as insulator structures, stable capacitor devices, and light-emitting diodes (LEDs).

نویسندگان

I-Tsan Liu [ Department of Materials Science and Engineering, National Cheng Kung University, Tainan, 701, Taiwan ]

Min-Hsiung Hon [ Department of Materials Science and Engineering, National Cheng Kung University, Tainan, 701, Taiwan ]

Lay Gaik Teoh [ Department of Mechanical Engineering, National Pingtung University of Science and Technology, Neipu, 912, Pingtung, Taiwan ]

کلمات کلیدی

CeO2 optical properties precipitation method nanoparticles

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Journal of Electronic Materials 2013

The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications.

حوزه های تحت پوشش : nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications