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Efficient manganese luminescence induced by Ce3+-Mn2+ energy transfer in rare earth fluoride and phosphate nanocrystals.

Ding Y, Liang LB, Li M, He DF, Xu L, Wang P, Yu XF - Nanoscale Res Lett (2011)

Bottom Line: Manganese materials with attractive optical properties have been proposed for applications in such areas as photonics, light-emitting diodes, and bioimaging.CeF3 and CePO4 NCs doped with Mn2+ have been prepared and can be well dispersed in aqueous solutions.By optimizing Mn2+ doping concentrations, Mn2+ luminescence quantum efficiency and Ce3+-Mn2+ energy transfer efficiency can respectively reach 14% and 60% in the CeF3:Mn NCs.

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Affiliation: Department of Physics, Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Luoshi Road, Wuhan 430072, China. yxf@whu.edu.cn.

ABSTRACT
Manganese materials with attractive optical properties have been proposed for applications in such areas as photonics, light-emitting diodes, and bioimaging. In this paper, we have demonstrated multicolor Mn2+ luminescence in the visible region by controlling Ce3+-Mn2+ energy transfer in rare earth nanocrystals [NCs]. CeF3 and CePO4 NCs doped with Mn2+ have been prepared and can be well dispersed in aqueous solutions. Under ultraviolet light excitation, both the CeF3:Mn and CePO4:Mn NCs exhibit Mn2+ luminescence, yet their output colors are green and orange, respectively. By optimizing Mn2+ doping concentrations, Mn2+ luminescence quantum efficiency and Ce3+-Mn2+ energy transfer efficiency can respectively reach 14% and 60% in the CeF3:Mn NCs.

No MeSH data available.


Investigated ηQE and ηET. Mn2+ luminescence quantum efficiency (ηQE) and Ce3+-Mn2+ energy transfer efficiency (ηET) vs. molar percent of Mn2+ in CeF3:Mn (a) and CePO4:Mn NCs (b).
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Figure 5: Investigated ηQE and ηET. Mn2+ luminescence quantum efficiency (ηQE) and Ce3+-Mn2+ energy transfer efficiency (ηET) vs. molar percent of Mn2+ in CeF3:Mn (a) and CePO4:Mn NCs (b).

Mentions: The Ce3+-Mn2+ energy transfer efficiency (ηET) was estimated from the emission intensity ratio IMn/(ICe + IMn) when the sample solutions were sufficiently diluted and the energy loss caused by the re-absorption effects between different particles could be neglected [31,33]. As shown in Figure 5a, a high ηET of 60% is observed in the CeF3:Mn NCs while the Mn2+ doping concentration is over 10%. We note that the IMn is much weaker than the ICe in the previously reported Mn,Ce co-doped CaF2 and other bulk materials because of a portion of randomly dispersed Ce3+ and Mn2+ ions beyond the interaction distance for the short-range energy transfer [19,34]. In our CeF3:Mn NCs, the Ce3+-Mn2+ clusters are easily formed and result in the efficient Ce3+-Mn2+ energy transfer.


Efficient manganese luminescence induced by Ce3+-Mn2+ energy transfer in rare earth fluoride and phosphate nanocrystals.

Ding Y, Liang LB, Li M, He DF, Xu L, Wang P, Yu XF - Nanoscale Res Lett (2011)

Investigated ηQE and ηET. Mn2+ luminescence quantum efficiency (ηQE) and Ce3+-Mn2+ energy transfer efficiency (ηET) vs. molar percent of Mn2+ in CeF3:Mn (a) and CePO4:Mn NCs (b).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211164&req=5

Figure 5: Investigated ηQE and ηET. Mn2+ luminescence quantum efficiency (ηQE) and Ce3+-Mn2+ energy transfer efficiency (ηET) vs. molar percent of Mn2+ in CeF3:Mn (a) and CePO4:Mn NCs (b).
Mentions: The Ce3+-Mn2+ energy transfer efficiency (ηET) was estimated from the emission intensity ratio IMn/(ICe + IMn) when the sample solutions were sufficiently diluted and the energy loss caused by the re-absorption effects between different particles could be neglected [31,33]. As shown in Figure 5a, a high ηET of 60% is observed in the CeF3:Mn NCs while the Mn2+ doping concentration is over 10%. We note that the IMn is much weaker than the ICe in the previously reported Mn,Ce co-doped CaF2 and other bulk materials because of a portion of randomly dispersed Ce3+ and Mn2+ ions beyond the interaction distance for the short-range energy transfer [19,34]. In our CeF3:Mn NCs, the Ce3+-Mn2+ clusters are easily formed and result in the efficient Ce3+-Mn2+ energy transfer.

Bottom Line: Manganese materials with attractive optical properties have been proposed for applications in such areas as photonics, light-emitting diodes, and bioimaging.CeF3 and CePO4 NCs doped with Mn2+ have been prepared and can be well dispersed in aqueous solutions.By optimizing Mn2+ doping concentrations, Mn2+ luminescence quantum efficiency and Ce3+-Mn2+ energy transfer efficiency can respectively reach 14% and 60% in the CeF3:Mn NCs.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Physics, Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Luoshi Road, Wuhan 430072, China. yxf@whu.edu.cn.

ABSTRACT
Manganese materials with attractive optical properties have been proposed for applications in such areas as photonics, light-emitting diodes, and bioimaging. In this paper, we have demonstrated multicolor Mn2+ luminescence in the visible region by controlling Ce3+-Mn2+ energy transfer in rare earth nanocrystals [NCs]. CeF3 and CePO4 NCs doped with Mn2+ have been prepared and can be well dispersed in aqueous solutions. Under ultraviolet light excitation, both the CeF3:Mn and CePO4:Mn NCs exhibit Mn2+ luminescence, yet their output colors are green and orange, respectively. By optimizing Mn2+ doping concentrations, Mn2+ luminescence quantum efficiency and Ce3+-Mn2+ energy transfer efficiency can respectively reach 14% and 60% in the CeF3:Mn NCs.

No MeSH data available.