Mn2+/Mn4+ co-doped LaM1-xAl11-yO19 (M = Mg, Zn) luminescent materials: electronic structure, energy transfer and optical thermometry properties

2021 ◽  
Author(s):  
Dayu Huang ◽  
Qiuyun Ouyang ◽  
Bin Liu ◽  
Bingkun Chen ◽  
Yuting Wang ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Energy Transfer ◽  
Emission Band ◽  
Green Emission ◽  
Luminescent Materials ◽  
Manganese Ion ◽  
Green Emission Band ◽  
Optical Thermometry ◽  
Co Doped

Dual-emitting from manganese ion doped LaM1-xAl11-yO19 (M = Mg, Zn) phosphors were prepared by Mn2+ substituting Zn2+/Mg2+ and Mn4+ replacing Al3+. The LaM1-xAl11-yO19:xMn2+,yMn4+phosphor present narrow green emission band of the...

Energy Transfer and Green/Red Phosphorescence in γ-Zn3(PO4)2:Mn2+, Ga3+

2012 ◽  
Vol 538-541 ◽  
pp. 2396-2400
Author(s):  
Rui Xia Zhong ◽  
Zi Ran Liu ◽  
Xiao Peng Meng ◽  
Ming Ya Li ◽  
Xiao Yan Zhang
Keyword(s):  
Energy Transfer ◽  
Emission Band ◽  
Green Emission ◽  
Electron Trap ◽  
Excitation Band ◽  
Luminescent Center ◽  
Green Emission Band ◽  
The Matrix ◽  
Co Doped

In this letter, γ-Zn3(PO4)2: Mn2+ phosphors have only one emission band centered at 620 nm while two emission bands are observed in γ-Zn3(PO4)2: Mn2+, Ga3+, which are respectively centered at 507 nm and 620 nm. The spectral overlap between the green emission band and the excitation band monitored at 620 nm, which supports the occurrence of the energy transfer from Mn2+ (CN=4) to Mn2+ (CN=6), has been studied. The influence of Ga3+ ions on luminescence and long lasting phosphorescence properties of Mn2+ in phosphor γ-Zn3(PO4)2: Mn2+, Ga3+ are also investigated. It is found that the green/red phosphorescence performance of Mn2+ ion such as brightness and duration is largely improved when Ga3+ ion is co-doped into the matrix in which Mn2+ ion acts as luminescent center and Ga3+ ion plays an important role of electron trap.

Dazzling green emission from graphene oxide nanosheet-embedded co-doped Ce3+ and Tb3+:PVA polymer nanocomposites for photonic applications

RSC Advances ◽  
2016 ◽  
Vol 6 (59) ◽  
pp. 54525-54538 ◽  
Author(s):  
K. Naveen Kumar ◽  
R. Padma ◽  
J. L. Rao ◽  
Misook Kang
Keyword(s):  
Graphene Oxide ◽  
Energy Transfer ◽  
Polymer Nanocomposites ◽  
Green Emission ◽  
Graphene Oxide Nanosheet ◽  
Uv Excitation ◽  
Co Doped

Novel dazzling green emission has been obtained from graphene oxide nanosheet-embedded Ce3+ and Tb3+:PVA polymer nanocomposites under UV excitation. The green emission of Tb3+ is enhanced by an energy transfer from Ce3+ to Tb3+ and GO NS to Tb3+.

Photoluminescent Green Emission Band Induced by the Systematic Change of -CH3, -OCH3 and Naphthyl Groups in Chiral Imines

2018 ◽  
Vol 18 (2) ◽  
pp. 660-668 ◽  
Author(s):  
O. Portillo Moreno ◽  
F. J. Meléndez Bustamante ◽  
M. Chávez Portillo ◽  
G. E. Moreno Morales ◽  
G. Hernández Téllez ◽  
...  
Keyword(s):  
Emission Band ◽  
Green Emission ◽  
Systematic Change ◽  
Green Emission Band ◽  
Chiral Imines

The Origin of the Green Emission Band in Polyfluorene Type Polymers

2006 ◽  
pp. 153-181
Author(s):  
S. Gamerith ◽  
C. Gadermaier ◽  
U. Scherf ◽  
E. J. W. List
Keyword(s):  
Emission Band ◽  
Green Emission ◽  
Green Emission Band

Energy transfer, tunable emission and optical thermometry in Tb 3+ /Eu 3+ co-doped transparent NaCaPO 4 glass ceramics

2016 ◽  
Vol 42 (11) ◽  
pp. 13086-13090 ◽  
Author(s):  
Le-Qi Yao ◽  
Guo-Hua Chen ◽  
Tao Yang ◽  
San-Chuan Cui ◽  
Zhen-Chun Li ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Glass Ceramics ◽  
Optical Thermometry ◽  
Co Doped ◽  
Tunable Emission

White-Light-Emitting Phosphate Phosphors of SrZn2(PO4)2: Eu2+, Mn2+ Synthesized through Combustion Process

2011 ◽  
Vol 688 ◽  
pp. 344-348
Author(s):  
Xiao Song Yan ◽  
Wan Wan Li ◽  
Kang Sun
Keyword(s):  
Emission Band ◽  
Combustion Process ◽  
Blue Emission ◽  
Green Emission ◽  
Mixture Ratio ◽  
Blue Emission Band ◽  
Light Emitting ◽  
Green Emission Band ◽  
Emission Color ◽  
Emission Light

The SrZn2(PO4)2: Eu2+, Mn2+ phosphors were synthesized through combustion process with varying mixture ratio of Eu2+, Mn2+. The SrZn2(PO4)2: Eu2+, Mn2+ phosphor presents three emission bands under 365nm radiation: the blue emission band of 416 nm from Eu2+ occupying the Sr2+ site, the green emission band of 538 nm and the red emission band of 630 nm from Mn2+ occupying two different Zn2+ sites. Compared with the SrZn2(PO4)2: Eu2+, Mn2+ phosphor prepared through solid state reaction, the luminous intensity of the phosphor is greatly improved through the combustion reaction. White emission light with a high color rending index of 84.7 can be obtained from the phosphor of SrZn2(PO4)2: Eu2+, Mn2+, and the emission color tone of the phosphor varies from blue, white, and finally yellow by increasing the ratio of the concentrations of Eu2+ and Mn2+.

Tunable blue-green emission and energy transfer properties in β-Ca3(PO4)2:Eu2+, Tb3+ phosphors with high quantum efficiencies for UV-LEDs

2015 ◽  
Vol 44 (10) ◽  
pp. 4683-4692 ◽  
Author(s):  
Kai Li ◽  
Yang Zhang ◽  
Xuejiao Li ◽  
Mengmeng Shang ◽  
Hongzhou Lian ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Concentration Ratio ◽  
Green Emission ◽  
High Quantum ◽  
Emission Color ◽  
Potential Applications ◽  
Uv Leds ◽  
Transfer Properties ◽  
Co Doped ◽  
The Eu

A series of Eu2+ and Tb3+ singly-doped and co-doped β-Ca3(PO4)2 phosphors have been synthesized. The emission color can be tuned from blue to green by adjusting the Eu2+/Tb3+ concentration ratio, showing their potential applications in UV-pumped wLEDs.

scholarly journals pH Assist for Highly selective determination of Xipamide by the enhancement of the green emission of Tb3+ optical sensor

2014 ◽  
Vol 10 (5) ◽  
pp. 2720-2727 ◽  
Author(s):  
M. S. Attia ◽  
A. O. Yuossef ◽  
M. Diab ◽  
M. F. El-Shahat
Keyword(s):  
Detection Limit ◽  
Optical Sensor ◽  
Emission Band ◽  
Photophysical Properties ◽  
Green Emission ◽  
Accurate Method ◽  
Selective Determination ◽  
Pharmaceutical Tablets ◽  
Green Emission Band

The highly selective, accurate method for determination of Xipamide was maintained. The method depends on the enhancement of the green emission band of Tb3+ at 545 nm in the presence of different concentration of  Xipamide at pH 4.1 and λex = 320 nm in acetonitrile. The photophysical properties of the green  emissive Tb3+  complex have been elucidated, the terbium was used as optical sensor for the assessment of  Xipamide in the pharmaceutical tablets and body fluids with a concentration range 5.0 ×10−9 – 2.3 ×10−6 mol L−1 of xipamide, correlation coefficient of 0.995 and  detection limit of 8.5 ×10−10 mol L−1.

Green emission band induced by crystal defects in halogenated (-Br, -Cl, -F) chiral imines with a benzo[b]thiophene-based moiety

2019 ◽  
Vol 94 ◽  
pp. 337-347 ◽  
Author(s):  
B. Anzaldo Olivares ◽  
O. Portillo Moreno ◽  
G. Hernández Téllez ◽  
E. Rubio Rosas ◽  
F.J. Meléndez Bustamante ◽  
...  
Keyword(s):  
Emission Band ◽  
Green Emission ◽  
Crystal Defects ◽  
Green Emission Band ◽  
Chiral Imines
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