ThuliumV1, Main, Exploration, bibRecordById, pubmed:12938407

[High efficiency and low threshold upconversion from IR to red for Er3+ and Tm3+ co-doped fluoride-oxide glass-ceramic].

Identifieur interne : 001D71 ( Main/Exploration ); précédent : 001D70; suivant : 001D72

[High efficiency and low threshold upconversion from IR to red for Er3+ and Tm3+ co-doped fluoride-oxide glass-ceramic].

Auteurs : Guan-Shi Qin [République populaire de Chine] ; Wei-Ping Qin ; Bao-Jiu Chen ; Shu-Lin E ; Zhong-Jiu Ge ; Xin-Guang Ren ; Shi-Hua Huang

Source :

Guang pu xue yu guang pu fen xi = Guang pu [ 1000-0593 ] ; 2002.

RBID : pubmed:12938407

Descripteurs français

KwdFr :
- Composés organométalliques (), Cristallisation, Céramiques, Diffraction des rayons X, Erbium (), Fluor (), Luminescence, Nanotechnologie, Oxydes (), Spectrophotométrie (), Température, Thulium (), Transfert d'énergie, Verre.
MESH :
- Composés organométalliques, Cristallisation, Céramiques, Diffraction des rayons X, Erbium, Fluor, Luminescence, Nanotechnologie, Oxydes, Spectrophotométrie, Température, Thulium, Transfert d'énergie, Verre.

English descriptors

KwdEn :
- Ceramics, Crystallization, Energy Transfer, Erbium (chemistry), Fluorine (chemistry), Glass, Luminescence, Nanotechnology, Organometallic Compounds (chemistry), Oxides (chemistry), Spectrophotometry (methods), Temperature, Thulium (chemistry), X-Ray Diffraction.
MESH :
- chemical , chemistry : Erbium, Fluorine, Organometallic Compounds, Oxides, Thulium.
- methods : Spectrophotometry.
- Ceramics, Crystallization, Energy Transfer, Glass, Luminescence, Nanotechnology, Temperature, X-Ray Diffraction.

Abstract

In this paper, high efficiency and low threshold upconversion from IR to red is reported, for Er3+ and Tm3+ co-doped fluoride-oxide glass-ceramic under 978 nm LD excitation. The component of sample in experiment is 65GeO2-25NaF-8.5BaF2-1Er2O3-0.5 Tm2O3, and the prepared method is obtained. The upconversion emission spectra under 978 nm LD excitation is measured at room temperature. Analyzing it, we find that introduction of Tm3+ into Er3+ doped system preferentially quenches the green upconversion fluorescence from 4S3/2 level of Er3+ duo to the efficient cross-relaxation of 4I13/2-->4I15/2 (Er): 3H6-->3H4 (Tm) which can significantly reduce the upconversion efficiency from 4I13/2 level to the emitting 4S3/2 level, and the Tm3+ behaves as a good sensitizer of the red upconversion from the 4F9/2 level of Er3+ which is mainly populated by the cross-relaxation of 3H4-->3H6 (Tm): 4I11/2-->4F9/2 (Er). However, at low Er3+ concentration (2 mol%), it is impossible for strong red upconversion. X-ray analysis is done, there are lots of nanocrystallites in MFG glass-ceramic. So we think, this red upconversion is attributed to Er3+ enriched fluoride microcrystallites, which makes the cross-relaxation of 3H4-->3H6 (Tm): 4I11/2-->4F9/2 (Er) more effective, therefore their active optical properties may be optimised. In the end, the relationship between LD working current and intensity of upconversion luminescence is discussed, the results confirm that both red and green upconversion processes are consisted by two photons.

PubMed: 12938407

Affiliations:

Le document en format XML

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<front><div type="abstract" xml:lang="en">In this paper, high efficiency and low threshold upconversion from IR to red is reported, for Er3+ and Tm3+ co-doped fluoride-oxide glass-ceramic under 978 nm LD excitation. The component of sample in experiment is 65GeO2-25NaF-8.5BaF2-1Er2O3-0.5 Tm2O3, and the prepared method is obtained. The upconversion emission spectra under 978 nm LD excitation is measured at room temperature. Analyzing it, we find that introduction of Tm3+ into Er3+ doped system preferentially quenches the green upconversion fluorescence from 4S3/2 level of Er3+ duo to the efficient cross-relaxation of 4I13/2-->4I15/2 (Er): 3H6-->3H4 (Tm) which can significantly reduce the upconversion efficiency from 4I13/2 level to the emitting 4S3/2 level, and the Tm3+ behaves as a good sensitizer of the red upconversion from the 4F9/2 level of Er3+ which is mainly populated by the cross-relaxation of 3H4-->3H6 (Tm): 4I11/2-->4F9/2 (Er). However, at low Er3+ concentration (2 mol%), it is impossible for strong red upconversion. X-ray analysis is done, there are lots of nanocrystallites in MFG glass-ceramic. So we think, this red upconversion is attributed to Er3+ enriched fluoride microcrystallites, which makes the cross-relaxation of 3H4-->3H6 (Tm): 4I11/2-->4F9/2 (Er) more effective, therefore their active optical properties may be optimised. In the end, the relationship between LD working current and intensity of upconversion luminescence is discussed, the results confirm that both red and green upconversion processes are consisted by two photons.</div>
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[High efficiency and low threshold upconversion from IR to red for Er3+ and Tm3+ co-doped fluoride-oxide glass-ceramic].

[High efficiency and low threshold upconversion from IR to red for Er3+ and Tm3+ co-doped fluoride-oxide glass-ceramic].

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

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