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Issue 37, 2013
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Efficient red phosphor double-perovskite Ca3WO6 with A-site substitution of Eu3+

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Abstract

Luminescent properties of Eu3+ activated double perovskite structure Ca3WO6 were investigated. It emits an ideal red color centered at the wavelength of 618 nm with suitable excitation from f–f transitions of Eu3+ ions (360–550 nm) matching the near ultraviolet and blue LEDs. Charge compensation effect of Li+, Na+, and K+ was investigated, and K+ proved to be the best. The co-doping ion K+ has a great effect on the lattice distortion of the host matrix Ca3WO6, which facilitates the red emission of Eu3+. The substitution site for Ca in Ca3WO6 was analyzed in detail by Raman spectra and calculation results. A-site substitution is responsible for the red emission of Eu3+ activated Ca3WO6. The integrated emission intensity of optimal Ca3WO6:K+,Eu3+ excited at 395 nm is about 3.5 times greater than that of Y2O2S:Eu3+ commercial phosphors, which makes it a promising red phosphor for white LEDs.

Graphical abstract: Efficient red phosphor double-perovskite Ca3WO6 with A-site substitution of Eu3+

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Publication details

The article was received on 19 Apr 2013, accepted on 02 Jul 2013 and first published on 02 Jul 2013


Article type: Paper
DOI: 10.1039/C3DT51029H
Citation: Dalton Trans., 2013,42, 13502-13508
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    Efficient red phosphor double-perovskite Ca3WO6 with A-site substitution of Eu3+

    X. Zhao, J. Wang, L. Fan, Y. Ding, Z. Li, T. Yu and Z. Zou, Dalton Trans., 2013, 42, 13502
    DOI: 10.1039/C3DT51029H

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