scholarly journals Efficient upconversion luminescence from Ba5Gd8Zn4O21:Yb3+, Er3+ based on a demonstrated cross-relaxation process

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Chao Mi ◽  
Jianhong Wu ◽  
Yanmin Yang ◽  
Boning Han ◽  
Jun Wei
Keyword(s):  
Relaxation Process ◽  
Upconversion Luminescence ◽  
Cross Relaxation ◽  
Cross Relaxation Process

Tunable emission color of Li2 SrSiO4 :Tb3+ due to cross-relaxation process and optical thermometry investigation

2018 ◽  
Vol 101 (7) ◽  
pp. 3076-3085 ◽  
Author(s):  
Xiao Zhou ◽  
Sha Jiang ◽  
Guotao Xiang ◽  
Xiao Tang ◽  
Xiaobing Luo ◽  
...  
Keyword(s):  
Relaxation Process ◽  
Cross Relaxation ◽  
Cross Relaxation Process ◽  
Emission Color ◽  
Optical Thermometry ◽  
Tunable Emission

Cross-relaxation energy transfer between the Er3+ ions in vitreous arsenic chalcogenide

2019 ◽  
Vol 33 (28) ◽  
pp. 1950348
Author(s):  
S. Q. Asadullayeva ◽  
Q. Y. Eyyubov
Keyword(s):  
Energy Transfer ◽  
Relaxation Process ◽  
Luminescence Intensity ◽  
Near Infrared ◽  
Cross Relaxation ◽  
Relaxation Energy ◽  
Infrared Luminescence ◽  
Cross Relaxation Process ◽  
The Cross ◽  
Activator Ions

In this paper, we study widely investigated photoluminescent properties of [Formula: see text] compounds in the near-infrared ranges. The increase of the infrared luminescence intensity with increasing [Formula: see text] concentration can be attributed to the cross-relaxation process between the activator ions.

Cross-relaxation process between +3 rare-earth ions inLiYF4crystals

1996 ◽  
Vol 54 (6) ◽  
pp. 3825-3829 ◽  
Author(s):  
L. Gomes ◽  
L. C. Courrol ◽  
L. V. G. Tarelho ◽  
I. M. Ranieri
Keyword(s):  
Rare Earth ◽  
Relaxation Process ◽  
Cross Relaxation ◽  
Rare Earth Ions ◽  
Cross Relaxation Process

Tuning Upconversion Emission of -NaGdF4:Yb3+/Ho3+ Nanorods Through Yb3+

2016 ◽  
Vol 16 (4) ◽  
pp. 3754-3758 ◽  
Author(s):  
Fangqi Gao ◽  
Wei Gao ◽  
Ruibo Wang ◽  
Longxiang Yan ◽  
Jinping Li ◽  
...  
Keyword(s):  
Sample Size ◽  
Relaxation Process ◽  
Solvothermal Method ◽  
Fluorescence Emission ◽  
Green Emission ◽  
Upconversion Emission ◽  
Cross Relaxation ◽  
Red Emission ◽  
Cross Relaxation Process ◽  
Upconversion Mechanism

Yb3+/Ho3+ doped hexagonal NaGdF4 nanocrystals are synthesized through solvothermal method, for which pure hexagonal phased nanorods are presented. The concentration influence of Yb3+ ions on the sample morphology and fluorescence emission of Ho3+ is investigated. It is found that the sample size is changed from 25 nm to 125 nm and the upconversion emission is tuned from green to yellow when the concentration of Yb3+ ions is increased from 5.0 mol% to 50.0 mol%. The possible upconversion mechanism and the improvement of crystallinity are carefully investigated. It is suggested that the cross-relaxation process between Ho3+ ions promotes the red emission and quenches the green emission.

scholarly journals Determination of reverse cross-relaxation process constant in Tm-doped glass by ^3H_4 fluorescence decay tail fitting

2017 ◽  
Vol 7 (10) ◽  
pp. 3760 ◽  
Author(s):  
Ali Albalawi ◽  
Stefano Varas ◽  
Alessandro Chiasera ◽  
Hrvoje Gebavi ◽  
Wedad Albalawi ◽  
...  
Keyword(s):  
Relaxation Process ◽  
Fluorescence Decay ◽  
Cross Relaxation ◽  
Cross Relaxation Process ◽  
Doped Glass

scholarly journals Mechanisms of the energy transfer between thulium ions in tungstate and molybdate crystals

2021 ◽  
pp. 33-40
Author(s):  
Natali V. Gusakova ◽  
Maxim P. Demesh ◽  
Anatol S. Yasukevich ◽  
Anatoliy A. Pavlyuk ◽  
Nikolay V. Kuleshov
Keyword(s):  
Energy Transfer ◽  
Relaxation Process ◽  
Emission Spectra ◽  
Energy Migration ◽  
Cross Relaxation ◽  
Laser Generation ◽  
Laser Materials ◽  
Cross Relaxation Process ◽  
The Cross ◽  
Hopping Model

In this work, we investigated mechanisms of the energy transfer in Tm : KY(WO4)2, Tm : KLu(WO4)2 and Tm:NaBi(MoO4)2 crystals. Room-temperature absorption and emission spectra were used to determine microparameters of energy migration among thulium ions in the 3H4 and 3F4 excited states in the frames of Förster – Dexter theory. Parameters of cross-relaxation 3H4 + 3H6 → 3F4 + 3F4 and energy migration were obtained via analysis of luminescence decay 3H4 → 3F4 with a hopping model. The parameters describing excitation migration between thulium ions in 3H4 state obtained by two methods were in good agreement. It has been shown that the dipole-dipole mechanism of interaction is responsible for the efficient cross-relaxation process in the crystals under study. The results indicate that the energy migration between 3H4 enhances the cross-relaxation at thulium content more than ∼1.3–1.5 at. % in these laser materials. The obtained values of the migration parameters CDD exceed the values of the cross-relaxation parameters CDA, and the energy transfer in these materials can be described with the hopping model. An efficient cross-relaxation process leads to the relatively high efficiencies of the systems based on these crystals under pumping at 0.8 µm. The dominant process of energy migration between thulium ions in 3F4 excited state makes tungstate and molybdate crystals good candidates for the Ho3+ co-activation for laser generation at 2.1 µm. Parameters obtained in this study can be used for mathematical modeling of laser characteristics.

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