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Issue 43, 2013
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Tunable photoluminescence and energy transfer of YBO 3:Tb 3+, Eu 3+ for white light emitting diodes

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Abstract

Rare-earth (Eu 3+, Tb 3+) ion co-doped YBO 3 phosphors with a morphology of uniform flower-like assembly are fabricated by a facile hydrothermal method without the use of surfactant, organic ligands, or further sintering treatment. Photoluminescence (PL) studies have demonstrated that under the excitation of 365 nm ultraviolet (UV) light, YBO 3:Tb 3+, Eu 3+ emits a white light, including three emissions: a blue band attributed to self-trapped excitons (STEs), a green band due to the Tb 3+ transition of 5D 47F j ( j = 6, 5, 4, and 3), and a red band due to the Eu 3+ transition of 5D 07F j ( j = 0, 1, 2, 3, and 4). Energy transfers from host YBO 3 to Tb 3+, and Eu 3+ and Tb 3+ to Eu 3+, as well as tunable emission by varying the relative doping ratios are demonstrated. The combination of blue emission from STEs with green and red emissions from activators provides a novel and efficient technique to make white light emitting diodes (WLEDs).

Graphical abstract: Tunable photoluminescence and energy transfer of YBO 3:Tb 3+, Eu 3+ for white light emitting diodes

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Publication details

The article was received on 20 Jun 2013, accepted on 15 Sep 2013 and first published on 17 Sep 2013


Article type: Paper
DOI: 10.1039/C3TC31200C
Citation: J. Mater. Chem. C, 2013,1, 7202-7207
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    Tunable photoluminescence and energy transfer of YBO 3:Tb 3+, Eu 3+ for white light emitting diodes

    X. Zhang , Z. Zhao , X. Zhang, A. Marathe, D. B. Cordes, B. Weeks and J. Chaudhuri, J. Mater. Chem. C, 2013, 1, 7202
    DOI: 10.1039/C3TC31200C

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