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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.

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.


Fluorescence spectra of (1) Er-SBA-15 with Er3+ concentrations of 1.81 × 1020ions/cm3 (curve 1) and (2) Er(PMS)x-SBA-15 with Er3+ concentrations of 9.03 × 1019, 1.81 × 1020, and 2.71 × 1020ions/cm3, respectively (curves 2, 3 and 4)
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Figure 8: Fluorescence spectra of (1) Er-SBA-15 with Er3+ concentrations of 1.81 × 1020ions/cm3 (curve 1) and (2) Er(PMS)x-SBA-15 with Er3+ concentrations of 9.03 × 1019, 1.81 × 1020, and 2.71 × 1020ions/cm3, respectively (curves 2, 3 and 4)

Mentions: Figure 8 shows the emission spectra of 4I13/2→4I15/2 transition of Er3+ ions for (1) Er-SBA-15 with Er3+ concentration 1.81 × 1020ions/cm3(curve 1) and (2) Er(PMS)x-SBA-15 with three Er3+ concentrations 9.03 × 1019, 1.81 × 1020, and 2.71 × 1020ions/cm3 (curves 2, 3, and 4), respectively. In contrast to the poor emission from Er-SBA-15, all Er(PMS)x-SBA-15 samples show remarkably stronger emission. This result has led to a conclusion that PMS in the SBA-15 mesopores can enhance the emission. PMS is playing two important roles that (1) the low vibrational ligands Er(PMS)x can effectively retard the coordination of Er3+ with OH- groups existing on the inner walls of the pores which is with high vibrational energy and causes the de-excitation of excited Er3+ ions, and (2) the ligands Er(PMS)x also retard the aggregation of Er3+ ions. The negative effects of coordinating lanthanide ions with H2O molecules and hydroxyl groups in zeolites on its emission were already reported [12,13].


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)

Fluorescence spectra of (1) Er-SBA-15 with Er3+ concentrations of 1.81 × 1020ions/cm3 (curve 1) and (2) Er(PMS)x-SBA-15 with Er3+ concentrations of 9.03 × 1019, 1.81 × 1020, and 2.71 × 1020ions/cm3, respectively (curves 2, 3 and 4)
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Related In: Results  -  Collection

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Figure 8: Fluorescence spectra of (1) Er-SBA-15 with Er3+ concentrations of 1.81 × 1020ions/cm3 (curve 1) and (2) Er(PMS)x-SBA-15 with Er3+ concentrations of 9.03 × 1019, 1.81 × 1020, and 2.71 × 1020ions/cm3, respectively (curves 2, 3 and 4)
Mentions: Figure 8 shows the emission spectra of 4I13/2→4I15/2 transition of Er3+ ions for (1) Er-SBA-15 with Er3+ concentration 1.81 × 1020ions/cm3(curve 1) and (2) Er(PMS)x-SBA-15 with three Er3+ concentrations 9.03 × 1019, 1.81 × 1020, and 2.71 × 1020ions/cm3 (curves 2, 3, and 4), respectively. In contrast to the poor emission from Er-SBA-15, all Er(PMS)x-SBA-15 samples show remarkably stronger emission. This result has led to a conclusion that PMS in the SBA-15 mesopores can enhance the emission. PMS is playing two important roles that (1) the low vibrational ligands Er(PMS)x can effectively retard the coordination of Er3+ with OH- groups existing on the inner walls of the pores which is with high vibrational energy and causes the de-excitation of excited Er3+ ions, and (2) the ligands Er(PMS)x also retard the aggregation of Er3+ ions. The negative effects of coordinating lanthanide ions with H2O molecules and hydroxyl groups in zeolites on its emission were already reported [12,13].

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.