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Highly Efficient Near-IR Photoluminescence of Er Immobilized in Mesoporous SBA-15.

Xue YL, Wu P, Liu Y, Zhang X, Lin L, Jiang Q - Nanoscale Res Lett (2010)

Bottom Line: It is a 29.3% boost in fluorescent cross section compared to what has been obtained in conventional silica.The upconversion coefficient in Yb-Er-SBA-15 is relatively small compared to that in other ordinary glass hosts.The increased fluorescent cross section and lowered upconversion coefficient could benefit for the high-gain optical amplifier.

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ABSTRACT
SiO(2) mesoporous molecular sieve SBA-15 with the incorporation of erbium ions is studied as a novel type of nanoscopic composite photoluminescent material in this paper. To enhance the photoluminescence efficiency, two schemes have been used for the incorporation of Er(3+) where (1) Er(3+) is ligated with bis-(perfluoromethylsulfonyl)-aminate (PMS) forming Er(PMS)(x)-SBA-15 and (2) Yb(3+) is codoped with Er(3+) forming Yb-Er-SBA-15. As high as 11.17 × 10(-21)cm(2) of fluorescent cross section at 1534 nm and 88 nm of "effective bandwidth" have been gained. It is a 29.3% boost in fluorescent cross section compared to what has been obtained in conventional silica. The upconversion coefficient in Yb-Er-SBA-15 is relatively small compared to that in other ordinary glass hosts. The increased fluorescent cross section and lowered upconversion coefficient could benefit for the high-gain optical amplifier. Finally, the Judd-Ofelt theory has also been used for the analyses of the optical spectra of Er(PMS)(x)-SBA-15.

No MeSH data available.


Absorption spectra of (1) Er-SBA-15 and (2) Er(PMS)x-SBA-15
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Figure 7: Absorption spectra of (1) Er-SBA-15 and (2) Er(PMS)x-SBA-15

Mentions: Figure 7 displays two similar absorption spectra from (1) original SBA-15 with the direct inclusion of Er3+ ions and (2) Er(PMS)x complexes functionalized SBA-15. It demonstrates no obvious affection from PMS to the absorption spectrum of Er3+ ions. Compared to the absorption spectra of Er3+ in conventional disordered silica, no more difference was found in that of Er(PMS)x-SBA-15, except the double absorption peaks at 1502.2 and 1531.0 nm. This illustrates the electrons in the excited state 4I13/2 tend to centralize in two Stark sub-states.


Highly Efficient Near-IR Photoluminescence of Er Immobilized in Mesoporous SBA-15.

Xue YL, Wu P, Liu Y, Zhang X, Lin L, Jiang Q - Nanoscale Res Lett (2010)

Absorption spectra of (1) Er-SBA-15 and (2) Er(PMS)x-SBA-15
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2991226&req=5

Figure 7: Absorption spectra of (1) Er-SBA-15 and (2) Er(PMS)x-SBA-15
Mentions: Figure 7 displays two similar absorption spectra from (1) original SBA-15 with the direct inclusion of Er3+ ions and (2) Er(PMS)x complexes functionalized SBA-15. It demonstrates no obvious affection from PMS to the absorption spectrum of Er3+ ions. Compared to the absorption spectra of Er3+ in conventional disordered silica, no more difference was found in that of Er(PMS)x-SBA-15, except the double absorption peaks at 1502.2 and 1531.0 nm. This illustrates the electrons in the excited state 4I13/2 tend to centralize in two Stark sub-states.

Bottom Line: It is a 29.3% boost in fluorescent cross section compared to what has been obtained in conventional silica.The upconversion coefficient in Yb-Er-SBA-15 is relatively small compared to that in other ordinary glass hosts.The increased fluorescent cross section and lowered upconversion coefficient could benefit for the high-gain optical amplifier.

View Article: PubMed Central - HTML - PubMed

ABSTRACT
SiO(2) mesoporous molecular sieve SBA-15 with the incorporation of erbium ions is studied as a novel type of nanoscopic composite photoluminescent material in this paper. To enhance the photoluminescence efficiency, two schemes have been used for the incorporation of Er(3+) where (1) Er(3+) is ligated with bis-(perfluoromethylsulfonyl)-aminate (PMS) forming Er(PMS)(x)-SBA-15 and (2) Yb(3+) is codoped with Er(3+) forming Yb-Er-SBA-15. As high as 11.17 × 10(-21)cm(2) of fluorescent cross section at 1534 nm and 88 nm of "effective bandwidth" have been gained. It is a 29.3% boost in fluorescent cross section compared to what has been obtained in conventional silica. The upconversion coefficient in Yb-Er-SBA-15 is relatively small compared to that in other ordinary glass hosts. The increased fluorescent cross section and lowered upconversion coefficient could benefit for the high-gain optical amplifier. Finally, the Judd-Ofelt theory has also been used for the analyses of the optical spectra of Er(PMS)(x)-SBA-15.

No MeSH data available.