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 : 000494Hydrothermal 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 ZhangSource :
- Journal of colloid and interface science [ 1095-7103 ] ; 2013.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- 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:
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Le document en format XML
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<term>Hot Temperature</term>
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<term>Sodium (chemistry)</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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<name sortKey="Lu, Shaozhe" sort="Lu, Shaozhe" uniqKey="Lu S" first="Shaozhe" last="Lü">Shaozhe Lü</name>
<name sortKey="Luo, Yongshi" sort="Luo, Yongshi" uniqKey="Luo Y" first="Yongshi" last="Luo">Yongshi Luo</name>
<name sortKey="Zhang, Jiahua" sort="Zhang, Jiahua" uniqKey="Zhang J" first="Jiahua" last="Zhang">Jiahua Zhang</name>
<name sortKey="Zhang, Xia" sort="Zhang, Xia" uniqKey="Zhang X" first="Xia" last="Zhang">Xia Zhang</name>
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