Solid state synthesis, luminescent properties and energy transfer from Eu 2+ to Mn 2+ in red phosphor BaMg 2 Si 2 O 7 :Eu 2+ ,Mn 2+

2017 ◽  
Vol 72 ◽  
pp. 116-123 ◽  
Author(s):  
Weiqin Xiao ◽  
Fang Lei ◽  
Luqiao Yin ◽  
Ying Shi ◽  
Jianjun Xie ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Solid State ◽  
Luminescent Properties ◽  
Solid State Synthesis ◽  
Red Phosphor

A Study on the Luminescent Properties and Energy Transfer of Na2BaMgP2O8:Tb3+, Eu3+ Phosphor

2014 ◽  
Vol 700 ◽  
pp. 113-116
Author(s):  
Yu Jie Chen ◽  
Feng Lan Han ◽  
Zhao Luo
Keyword(s):  
Energy Transfer ◽  
Solid State ◽  
Powder Diffraction ◽  
Luminescent Properties ◽  
Solid State Lighting ◽  
Diffraction Measurement ◽  
Effective Energy ◽  
X Ray ◽  
Red Color ◽  
Effective Energy Transfer

Na2BaMgP2O8phosphors were synthesized by a standard solid state reaction and their luminescent properties were investigated. The phase structure was analyzed by X-ray powder diffraction measurement. Under the excitation of 365nm, Na2BaMgP2O8:Tb3+, Eu3+phosphors show two color bands of green and red color due to5D4−7F5transition of Tb3+ions and5D0−7F2transition of Eu3+ions, respectively. The emission intensity of Tb3+deceased with the increasing concentration of Eu3+, which verified that an effective energy transfer occurred from Tb3+to Eu3+in Na2BaMgP2O8host. The present study indicated that the phosphors have a high potential application in solid state lighting.

Photo and Electroluminescent Properties of a Porphyrin-Poly(p-Phenylene Vinylene) Derivative

1999 ◽  
Vol 598 ◽  
Author(s):  
J. Morgado ◽  
R. Iqbal ◽  
G. Yahioglu ◽  
L. R. Milgrom ◽  
S. C. Moratti ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Solid State ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Phenylene Vinylene ◽  
Efficient Energy Transfer ◽  
Light Emitting ◽  
Efficient Energy ◽  
Small Absorption ◽  
Pl Emission

ABSTRACTThe solid state luminescent properties of new statistical copolymers of 2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinylene and a porphyrin-substituted phenylene vinylene are reported. The photoluminescence, PL, emission shows an efficient energy transfer to the porphyrin, in spite of the small absorption coefficient of the porphyrin in the wavelength range of the poly [2-methoxy-5-(2'- ethylhexyloxy)-1,4-phenylene vinylene], MEH-PPV, emission. At a porphyrin content of 0.25%, by weight, the emission is already dominated by the porphyrin. The PL efficiency of these copolymers is significantly reduced from the value of 13% for MEH-PPV down to 3% for the copolymer with 10.84% of porphyrin. Efficient energy transfer is also observed in the emission spectra of light-emitting diodes.

Luminescent Properties of Eu2+-Activated SrAl2Si2O8 as an Potential Blue Phosphor for near UV LED Chips

2013 ◽  
Vol 750-752 ◽  
pp. 956-960 ◽  
Author(s):  
Li Jun Luo ◽  
Yi Wen Zhu ◽  
Ping Chen
Keyword(s):  
Energy Transfer ◽  
Solid State ◽  
Solid State Reaction ◽  
Luminescent Properties ◽  
Solid State Reaction Technique ◽  
Near Ultraviolet ◽  
Blue Phosphor ◽  
Uv Led ◽  
Host Lattices ◽  
Uv Range

The phosphors SrAl2Si2O8 doped with different Eu2+ concentration were prepared by solid-state reaction technique, and their photoluminescent properties at different temperature were investigated. With the increase of Eu2+ content, two emission bands can be observed and this can be interpreted as Eu2+ ions occupying two types of sites in the crystal lattice. And their lifetime is decreasing, this result can be due to energy transfer among Eu2+ ions nonradiately at higher concentration of Eu2+ ions in the host lattices. The phosphor SrAl2Si2O8:0.40Eu shares intense blue emitting with broad excitation in the near-UV range. This phosphor may be an excellent blue phosphor for near ultraviolet InGaN-based white diodes.

A New Method for Preparation and Luminescence of YBO3 :Eu3+ Phosphor

2011 ◽  
Vol 287-290 ◽  
pp. 1460-1463 ◽  
Author(s):  
Lin Yan Jia ◽  
Zhong Bao Shao ◽  
Yan Wen Tian
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Solid State Reaction Method ◽  
Luminescence Spectra ◽  
X Ray Diffraction ◽  
Conventional Solid State Reaction ◽  
Red Phosphor ◽  
Milling Method

The pure phase red phosphor yttrium borate doped with Eu3+was prepared by a new solid state reaction named high temperature ball milling method. The phosphor was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and luminescence spectra. The results show that the single phase YBO3:Eu3+phosphor was obtained at 600°C, which is obviously decreased in contrast to conventional solid state reaction method. The particles are approximately nanometer size with narrow distribution range and spherical morphology. In emission spectra, the strongest peak at 597nm is due to the transition5D0→7F1 of Eu3+ions under 394nm monitoring wavelength. The luminescent properties of YBO3:Eu3+phosphor with 25 mol% doping concentration of Eu3+is optimal.

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