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Issue 34, 2013
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Synthesis, structure and photoluminescence properties of europium-, terbium-, and thulium-doped Ca3Bi(PO4)3 phosphors

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Abstract

A series of Eu3+, Tb3+, Tm3+ singly and triply doped Ca3Bi(PO4)3 (CBP) phosphors were synthesized by solid-state reaction. Their structure and photoluminescence (PL) properties were first investigated in detail. Rietveld refinement analysis confirmed that the CBP has a cubic unit cell. Its space group was determined to be I[4 with combining macron]3d with cell parameters a = b = c = 9.941 Å and Z = 4. In addition, the Ca3Bi(PO4)3 shows both cation disorder and oxygen sublattice disorder. For the CBP:Eu3+ phosphor, the charge transfer bands in the PLE spectra were different at 293 K and 4.3 K, and a model was presented to give a possible explanation for this phenomenon. CBP:Eu3+ shows intense red emission due to 5D07F2 transition and its integral emission intensity and quantum efficiency are higher than the commercial Y2O3:Eu3+ phosphor under irradiation of 397 nm, indicating that the CBP:Eu3+ phosphor might have potential application in the NUV range for solid-state lighting. The CBP:Tb3+ and CBP:Tm3+ phosphors show intense green and blue emission due to 5D47F2 transition of the Tb3+ ions and the 1D23F4 transition of the Tm3+ ions, respectively. The energy transfer from the Tb3+ to Eu3+ ions was also validated by the spectra and decay curves of the Tb3+ ions. Tunable emission colors were obtained by triply doping Eu3+, Tb3+ and Tm3+ activators in a single host and adjusting their relative ratio.

Graphical abstract: Synthesis, structure and photoluminescence properties of europium-, terbium-, and thulium-doped Ca3Bi(PO4)3 phosphors

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Publication details

The article was received on 28 Feb 2013, accepted on 06 Jun 2013 and first published on 06 Jun 2013


Article type: Paper
DOI: 10.1039/C3DT50552A
Citation: Dalton Trans., 2013,42, 12395-12402
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    Synthesis, structure and photoluminescence properties of europium-, terbium-, and thulium-doped Ca3Bi(PO4)3 phosphors

    M. Jiao, N. Guo, W. Lü, Y. Jia, W. Lv, Q. Zhao, B. Shao and H. You, Dalton Trans., 2013, 42, 12395
    DOI: 10.1039/C3DT50552A

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