Limits...
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.

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.


Absorption spectra attributed to electronic transitions. Absorption spectra of CeF3:Mn and CePO4:Mn NCs.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3211164&req=5

Figure 3: Absorption spectra attributed to electronic transitions. Absorption spectra of CeF3:Mn and CePO4:Mn NCs.

Mentions: As shown in Figure 3, the CeF3:Mn NCs exhibit four absorption peaks located at 248, 235, 218, and 205 nm, which are attributed to the electronic transitions from the ground state to different 5d states of the Ce3+ ions. The above absorption peaks' wavelength of the CeF3:Mn NCs are in good agreement with those reported for CeF3 bulk crystals [22]. The CePO4:Mn NCs exhibit two absorption bands with peaks at 256 and 273 nm [23]. The two bands are overlapped because the excited state is strongly split by the crystal field [24]. We note that the Mn2+ 6A1g(S)-4Eg(D) and 6A1g(S)-4T2g(D) absorption transitions from 310 to 350 nm [18] in these NCs are not obvious due to the much weaker Mn2+ absorption ability and low Mn2+/Ce3+ ratio in the host.


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)

Absorption spectra attributed to electronic transitions. Absorption spectra of CeF3:Mn and CePO4:Mn NCs.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 3: Absorption spectra attributed to electronic transitions. Absorption spectra of CeF3:Mn and CePO4:Mn NCs.
Mentions: As shown in Figure 3, the CeF3:Mn NCs exhibit four absorption peaks located at 248, 235, 218, and 205 nm, which are attributed to the electronic transitions from the ground state to different 5d states of the Ce3+ ions. The above absorption peaks' wavelength of the CeF3:Mn NCs are in good agreement with those reported for CeF3 bulk crystals [22]. The CePO4:Mn NCs exhibit two absorption bands with peaks at 256 and 273 nm [23]. The two bands are overlapped because the excited state is strongly split by the crystal field [24]. We note that the Mn2+ 6A1g(S)-4Eg(D) and 6A1g(S)-4T2g(D) absorption transitions from 310 to 350 nm [18] in these NCs are not obvious due to the much weaker Mn2+ absorption ability and low Mn2+/Ce3+ ratio in the host.

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.