Controlled Synthesis of Tb3+ /Eu3+ Co-Doped Gd₂O₃ Phosphors with Enhanced Red Emission

Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry
Dong ZhuZongming Liu

Abstract

(Gd0.93-xTb0.07Eu x )₂O₃ (x = 0⁻0.10) phosphors shows great potential for applications in the lighting and display areas. (Gd0.93-xTb0.07Eu x )₂O₃ phosphors with controlled morphology were prepared by a hydrothermal method, followed by calcination at 1100 °C. XRD, FE-SEM, PL/PLE, luminescent decay analysis and thermal stability have been performed to investigate the Eu3+ content and the effects of hydrothermal conditions on the phase variation, microstructure, luminescent properties and energy transfer. Optimum excitation wavelength at ~308 nm nanometer ascribed to the 4f⁸-4f⁷5d¹ transition of Tb3+, the (Gd0.93-xTb0.07Eu x )₂O₃ phosphors display both Tb3+and Eu3+ emission with the strongest emission band at ~611 nm. For increasing Eu3+ content, the Eu3+ emission intensity increased as well while the Tb3+ emission intensity decreased owing to Tb3+→Eu3+ energy transfer. The energy transfer efficiencies were calculated and the energy transfer mechanism was discussed in detail. The lifetime for both the Eu3+ and Tb3+ emission decreases with the Eu3+ addition, the former is due to the formation of resonant energy transfer net, and the latter is because of contribution by Tb3+→Eu3+ energy transfer. The phosphor morphology can be cont...Continue Reading

References

Feb 4, 2016·Chemical Society Reviews·Yang LiJianrong Qiu
Sep 25, 2017·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Shuo LiWei Lü
May 5, 2018·ACS Applied Materials & Interfaces·Junhao LiMingmei Wu

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Citations

May 11, 2021·Luminescence : the Journal of Biological and Chemical Luminescence·Jayant G MahakhodeSanjay J Dhoble

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Methods Mentioned

BETA
X-ray
scanning electron microscopy

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