Vol. 22 No. 3 (2012)
Papers

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

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

Published 31-10-2012

Keywords

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

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

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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