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Broadband near-infrared emission from co-doped nanostructured glass ceramics
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) XRD patterns of (a) the precursor glass and (b) the glass ceramic. Inset: the TEM micrograph of the glass ceramic

Image of FIG. 2.
FIG. 2.

EDX spectra from (a) an individual nanocrystal and (b) the glass matrix in the glass ceramic co-doped with 0.1 mol% and 0.8 mol% .

Image of FIG. 3.
FIG. 3.

(Color online) Room temperature emission spectra of (a) and (b) single-doped glass ceramics, under 792 and 976 nm excitation, respectively. (c) Emission spectrum of doped polycrystalline film.20 Inset: luminescence decay curve of the single-doped sample recorded at 1543 nm.

Image of FIG. 4.
FIG. 4.

(Color online) Room temperature absorption spectra of 0.1 mol% single-doped glass and glass ceramic.

Image of FIG. 5.
FIG. 5.

(Color online) Near-infrared broadband emission spectra of the co-doped glass ceramics with different [Tm]/[Er] ratios under the 792 nm excitation.

Image of FIG. 6.
FIG. 6.

(Color online) Left: visible upconversion emission spectra of the co-doped glass ceramics with different [Tm]/[Er] ratios excited by 792 nm laser. Right: the variations of red, green emission intensities and red to green intensity ratio: (red/green) versus [Tm]/[Er] ratio.

Image of FIG. 7.
FIG. 7.

(Color online) Energy level diagrams of and and energy transfer routes between them. The solid arrows stand for the absorption and emission transitions of rare earth ions, the dashed arrows stand for the nonradiative relaxations, and the curved arrows stand for the energy transfers between and .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Broadband near-infrared emission from Tm3+∕Er3+ co-doped nanostructured glass ceramics