Synthesis and Photoluminescent Property of \(\text{MgO:Cr}^{3+}\) Powders

Authors

  • Trinh Thi Loan Faculty of Physics, Hanoi University of Science, VNU
  • Nguyen Ngoc Long Faculty of Physics, Hanoi University of Science, VNU
  • Le Hung Cuong Faculty of Physics, Hanoi University of Science, VNU

DOI:

https://doi.org/10.15625/0868-3166/22/3/444

Keywords:

MgO, Cr$^{3 }$, Synthesis, Photoluminescence

Abstract

MgO:Cr3+ powders with different dopant contents have been synthesized by sol-gel method using the following precursors: magnesium nitrate (Mg(NO3)2), chrome nitrate (Cr(NO\(_3\))\(_3\)), and citric acid. The effect of the Cr\(^{3+}\) concentration and heat-treating temperature on structural and optical properties of the synthesized samples has been studied. For the samples with the low Cr3+-dopant concentrations or low heat-treating temperature, the photoluminescent (PL) spectra consist of sharp lines assigned to the \(^2\)E \(\to\) \(^4\)A\(_2\) transition of ions Cr3+ in perfect octahedral symmetry sites. But for the samples with the high Cr\(^{3+}\)-dopant concentrations and undergone high heat-treating temperature, the PL spectra appear a broad emission bands, which is assigned to the \(^4\)T\(_1\to ^4\)A\(_2\) transitions within the Cr\(^{3+}\) ions in the MgO orthorhombic symmetry crystal field.

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Author Biography

Nguyen Ngoc Long, Faculty of Physics, Hanoi University of Science, VNU

Faculty of Physics, Hanoi University of Science, VNU

Published

31-10-2012

How to Cite

Loan, T. T., Long, N. N., & Cuong, L. H. (2012). Synthesis and Photoluminescent Property of \(\text{MgO:Cr}^{3+}\) Powders. Communications in Physics, 22(3), 239. https://doi.org/10.15625/0868-3166/22/3/444

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Section

Papers