scholarly journals Comparative Investigation on the Emission Properties of RAl3(BO3)4 (R = Pr, Eu, Tb, Dy, Tm, Yb) Crystals with the Huntite Structure

Crystals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 44 ◽  
Author(s):  
Enrico Cavalli ◽  
Nikolay Leonyuk
Keyword(s):  
Energy Transfer ◽  
Comparative Investigation ◽  
Concentration Quenching ◽  
Lattice Defects ◽  
Experimental Results ◽  
Luminescence Properties ◽  
Emission Properties ◽  
Transfer Processes ◽  
Decay Profile ◽  
Excitation Dynamics

The luminescence properties of RAl3(BO3)4 (RAB, with R = Pr, Eu, Tb, Dy, Tm, Yb) huntite crystals grown from K2Mo3O10 flux were systematically characterized in order to investigate their excitation dynamics, with particular reference to the concentration quenching that in these systems is incomplete. To this purpose, selected excitation, emission, and decay profile measurements on diluted R:YAB crystals were carried out and compared with those of the concentrated compounds. The effects of the energy transfer processes and of the lattice defects, as well as the ion-lattice interactions, have been taken into consideration in order to account for the experimental results.

Luminescence properties and energy transfer processes in YAG:Yb,Er single crystalline films

2013 ◽  
Vol 56 ◽  
pp. 134-138 ◽  
Author(s):  
Yu. Zorenko ◽  
V. Gorbenko ◽  
V. Savchyn ◽  
M. Batentschuk ◽  
A. Osvet ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Luminescence Properties ◽  
Single Crystalline ◽  
Transfer Processes ◽  
Crystalline Films

Luminescence properties and energy transfer processes in LiSrPO4 doped with Pr3+ and co-doped with Na+ and Mg2+

2021 ◽  
Vol 240 ◽  
pp. 118455
Author(s):  
Elena Trofimova ◽  
Sergey Omelkov ◽  
Ivo Romet ◽  
Marco Kirm ◽  
Vladimir Pustovarov ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Luminescence Properties ◽  
Transfer Processes ◽  
Co Doped

Effect of Ce3+ Concentration on the Luminescence Properties of Ce3+/Er3+/Yb3+ Tri-Doped NaYF4 Nanocrystals

2016 ◽  
Vol 16 (4) ◽  
pp. 3749-3753 ◽  
Author(s):  
Xuee Liu ◽  
Jianbei Qiu ◽  
Xuhui Xu ◽  
Dacheng Zhou
Keyword(s):  
Energy Transfer ◽  
Hydrothermal Method ◽  
Fluorescence Intensity ◽  
Emission Intensity ◽  
Doping Concentration ◽  
Near Infrared ◽  
Luminescence Properties ◽  
Emission Mechanism ◽  
Emission Properties ◽  
Nir Emission

In order to investigate the effect of Ce3+ concentration on the emission properties of Er3+/Yb3+ codoped NaYF4 nanocrystals, Ce3+/Er3+/Yb3+ tri-doped NaYF4 nanocrystals were prepared through a facile EDTA-assisted hydrothermal method. The upconversion (UC) and the near infrared (NIR) emission properties of Er3+ ions were systematically investigated in the NaYF4:Ce3+/Er3+/Yb3+ nanocrystals. Under 980 nm excitation, with the increasing of Ce3+ concentration, the emission intensity of Er3+ at 1550 nm (4I13/2 → 4I15/2) band increases initially and then decreases. The increase of the fluorescence intensity of 1550 nm is due to the energy transfer between Er3+ and Ce3+ ions: Er3+:4I11/2 +Ce3+:2F5/2 → Er3+:4I13/2 +Ce3+:2F7/2. But when Ce3+ doping concentration is 2.0%, the cross relaxation:Er3+:4I13/2 +Ce3+:2F5/2 →Er3+:4I15/2 +Ce3+:2F7/2 happens, which depopulates the 4I13/2 level of Er3+ and results in the decrease of the emission intensity of Er3+ at 1550 nm band. Meanwhile, incorporation of Ce3+ dramatically decreases the visible UC emission intensity. A possible emission mechanism was proposed.

Luminescence Properties and Energy Transfer Processes in Nanosized Cerium Doped YAG

2008 ◽  
Vol 55 (3) ◽  
pp. 1509-1513 ◽  
Author(s):  
Vladimir Pankratov ◽  
Larisa Grigorjeva ◽  
Stanislav Chernov ◽  
Tadeusz Chudoba ◽  
Witold Lojkowski
Keyword(s):  
Energy Transfer ◽  
Luminescence Properties ◽  
Transfer Processes

Luminescence properties and energy transfer processes in Ce3+-Sm3+ co-doped calcium aluminosilicate materials

2022 ◽  
Vol 123 ◽  
pp. 111864
Author(s):  
Nguyen Manh Son ◽  
Do Thanh Tien ◽  
Nguyen Thi Quynh Lien ◽  
Dinh Thanh Khan ◽  
Le Thi Thanh Hiep ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Luminescence Properties ◽  
Transfer Processes ◽  
Calcium Aluminosilicate ◽  
Co Doped

scholarly journals Enhancement of the Luminescence Properties of Eu (III) Containing Paramagnetic Saponite Clays

2021 ◽  
Vol 11 (19) ◽  
pp. 8903
Author(s):  
Stefano Marchesi ◽  
Chiara Bisio ◽  
Fabio Carniato
Keyword(s):  
Aqueous Solution ◽  
Energy Transfer ◽  
Hybrid Materials ◽  
Interlayer Space ◽  
Optical Emission ◽  
Luminescence Properties ◽  
Antenna Effect ◽  
Emission Properties ◽  
Two Samples ◽  
Synthetic Saponite

In this study, 1,10-phenanthroline molecules were introduced in the interlayer space of a paramagnetic synthetic saponite clay containing both Eu3+ and Gd3+ ions in structural positions. Two samples with different loading of phenanthroline dye were prepared. The resulting hybrid materials possessed improved optical emission properties due to an efficient antenna effect from the phenanthroline to the Eu3+ centers; this effect was demonstrated to be higher than the metal-to-metal Gd3+-Eu3+ energy transfer previously studied. Insights on the relaxometric properties in aqueous solution of the solids after incorporation of the antenna groups were also obtained through NMR relaxometric analyses.

THE QUENCHING OF THE IODINE FLUORESCENCE SPECTRUM

1958 ◽  
Vol 36 (1) ◽  
pp. 114-120 ◽  
Author(s):  
C. Arnot ◽  
C. A. McDowell
Keyword(s):  
Energy Transfer ◽  
Fluorescence Spectrum ◽  
Kinetic Scheme ◽  
Experimental Results ◽  
Inert Gases ◽  
Vibration Energy ◽  
Preliminary Results ◽  
Transfer Processes

The quenching of the iodine fluorescence spectrum by various inert gases and oxygen has been studied with a view to obtaining information on the efficiencies of vibration energy transfer processes in this system. Preliminary results here presented are in agreement with earlier work of Rössler and Eliaschevich and indicate that the transfer processes are very efficient. A kinetic scheme is proposed to account for the various possible quenching and transfer processes and it is shown that this is in agreement with experimental results.

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