Study of Addition of Tetraethyl Orthosilicate (TEOS) on Microstructure and Iuminescence Properties of Nanoparticles of Y2O3: Tb3+ Phosphor Materials

مهندسی متالورژی و مواد

Article 12, Volume 31, Issue 2 - Serial Number 22, September 2020, Pages 129-136   

Document Type: Original Articles

DOI: 10.22067/ma.v31i1.73528

Author

Seyed Mahdi Rafiaei^*

Golpayegan University of Technology

Abstract

In this investigation, firstly Y2O3: Tb +3 nano-powders with the approximate size of 80 nm was synthesized via sol-gel approach. Then, with the addition of Tetraethyl orthosilicate (TEOS) to the considered raw materials, the doped YSO compounds were produced in the presence of different amounts of SiO2 and crystallographic and microscopic structure and also the luminescence properties of the produced materials were evaluated. To study the formed phases and also particle size and morphology of Y2O3: Tb +3 and YSO: Tb +3 synthesized structures, X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM) were used. In this research, interestingly it was seen that the addition of silica results in the severe grain growth and this size reaches to 300-400 nm. In addition, with the employment of photoluminescence analyzer, the optical properties of these materials were studied. Finally, it was determined that in a case that the quantity of consumed SiO2 phase is equal to the stoichiometric values required for the formation of Y2SiO5, the highest emission intensity is achieved and the higher amounts of SiO2 leads to the reduction of intensity.

Keywords

Sol-gel; Optical properties; Luminescence; Nano; Phosphor Materials

Supplementary Files

12-rafiaie-Revised.pdf

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