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Hydrothermal synthesis and upconversion luminescence properties of β-NaGdF4:Yb3+/Tm3+ and β-NaGdF4:Yb3+/Ho3+ submicron crystals with regular morphologies.

Identifieur interne : 000493 ( Main/Exploration ); précédent : 000492; suivant : 000494

Hydrothermal synthesis and upconversion luminescence properties of β-NaGdF4:Yb3+/Tm3+ and β-NaGdF4:Yb3+/Ho3+ submicron crystals with regular morphologies.

Auteurs : Jing Li [République populaire de Chine] ; Zhendong Hao ; Xia Zhang ; Yongshi Luo ; Jihong Zhao ; Shaozhe Lü ; Jian Cao ; Jiahua Zhang

Source :

Journal of colloid and interface science [ 1095-7103 ] ; 2013.

RBID : pubmed:23141700

Descripteurs français

KwdFr :
- Cristallisation, Fluorures (), Gadolinium (), Holmium (), Luminescence, Sodium (), Température élevée, Thulium (), Ytterbium ().
MESH :
- Cristallisation, Fluorures, Gadolinium, Holmium, Luminescence, Sodium, Température élevée, Thulium, Ytterbium.

English descriptors

KwdEn :
- Crystallization, Fluorides (chemistry), Gadolinium (chemistry), Holmium (chemistry), Hot Temperature, Luminescence, Sodium (chemistry), Thulium (chemistry), Ytterbium (chemistry).
MESH :
- chemical , chemistry : Fluorides, Gadolinium, Holmium, Sodium, Thulium, Ytterbium.
- Crystallization, Hot Temperature, Luminescence.

Abstract

Single phase β-NaGdF(4):Yb(3+)/Tm(3+) and β-NaGdF(4):Yb(3+)/Ho(3+) submicron crystals with various morphologies including hexagonal prisms, spindles, and spheres were synthesized via the one-step hydrothermal method by controlling the pH values and sort of chelators (EDTA and citric acid). The prepared products showed intense up-converted luminescence (UCL) pumped by infrared laser at 980 nm. The hexagonal prisms that meaning high degree crystallinity demonstrated strong UCL in comparison with other morphologies such as spindles and spheres. In β-NaGdF(4):Yb(3+)/Tm(3+), UCL not only appeared transitions from (1)G(4), (1)D(2), and (1)I(6) states to the lower lying states of Tm(3+), but also (6)P(J)→(8)S(7/2) transition (310 nm) of Gd(3+). These UCL were responsible for three, five, and six photons processes determined by pump power dependence of UCL intensities. The observation of UCL of Gd(3+) implied occurrence of energy transfer from Tm(3+):(1)I(6) to Gd(3+):(6)P(J).

DOI: 10.1016/j.jcis.2012.09.076
PubMed: 23141700

Affiliations:

Le document en format XML

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<term>Hot Temperature</term>
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<term>Sodium (chemistry)</term>
<term>Thulium (chemistry)</term>
<term>Ytterbium (chemistry)</term>
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<term>Holmium</term>
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<term>Sodium</term>
<term>Température élevée</term>
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<front><div type="abstract" xml:lang="en">Single phase β-NaGdF(4):Yb(3+)/Tm(3+) and β-NaGdF(4):Yb(3+)/Ho(3+) submicron crystals with various morphologies including hexagonal prisms, spindles, and spheres were synthesized via the one-step hydrothermal method by controlling the pH values and sort of chelators (EDTA and citric acid). The prepared products showed intense up-converted luminescence (UCL) pumped by infrared laser at 980 nm. The hexagonal prisms that meaning high degree crystallinity demonstrated strong UCL in comparison with other morphologies such as spindles and spheres. In β-NaGdF(4):Yb(3+)/Tm(3+), UCL not only appeared transitions from (1)G(4), (1)D(2), and (1)I(6) states to the lower lying states of Tm(3+), but also (6)P(J)→(8)S(7/2) transition (310 nm) of Gd(3+). These UCL were responsible for three, five, and six photons processes determined by pump power dependence of UCL intensities. The observation of UCL of Gd(3+) implied occurrence of energy transfer from Tm(3+):(1)I(6) to Gd(3+):(6)P(J).</div>
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Hydrothermal synthesis and upconversion luminescence properties of β-NaGdF4:Yb3+/Tm3+ and β-NaGdF4:Yb3+/Ho3+ submicron crystals with regular morphologies.

Hydrothermal synthesis and upconversion luminescence properties of β-NaGdF4:Yb3+/Tm3+ and β-NaGdF4:Yb3+/Ho3+ submicron crystals with regular morphologies.

Source :

Descripteurs français

English descriptors

Abstract

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

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki

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