scholarly journals Effect of Eu3+Concentration on the Luminescent Properties of SrTiO3Phosphors Prepared by Pressure-Assisted Combustion Synthesis

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
C. R. García ◽  
J. Oliva ◽  
M. T. Romero ◽  
R. Ochoa-Valiente ◽  
L. A. Garcia Trujillo
Keyword(s):  
Solid State ◽  
Combustion Synthesis ◽  
Luminescent Properties ◽  
Solid State Lighting ◽  
Sem Images ◽  
Red Emission ◽  
Red Phosphors ◽  
Field Emission Displays ◽  
Potential Applications

This work presents the structural, morphological, and luminescent characterization of pure SrTiO3and SrTiO3:Eu3+powders doped with different europium atomic concentrations from 3.0 to 7.0 a.t.%. Those phosphors were prepared by pressure-assisted combustion synthesis using titanium oxide as precursor and were subjected to postannealing at 1200°C. XRD measurements indicated that undoped and Eu3+doped samples presented a single cubic crystalline phase and SEM images demonstrated that we have particles with sizes in the range of 0.2 µm–1.0 µm. Moreover, the size of the grains increases as the content of Eu3+dopant increases. A strong red emission from Eu3+ions was obtained by photoluminescence under excitation at 396 nm and confirmed by cathodoluminescence. All those results indicate that our red phosphors could be useful for potential applications in solid state lighting and field emission displays.

scholarly journals Synthesis of ZnO Nanoparticles/Nanofibers and Their Luminescence via Electrospinning

2021 ◽  
Vol 37 (2) ◽  
Author(s):  
Pham Hung Vuong ◽  
Pham Van Huan ◽  
Nguyen Dac Thong ◽  
Nguyen Duc Trung Kien ◽  
Ta Quoc Tuan
Keyword(s):  
Solid State ◽  
Phase Formation ◽  
Zno Nanoparticles ◽  
Zinc Acetate ◽  
Luminescent Properties ◽  
Solid State Lighting ◽  
Strong Luminescence ◽  
Electrospinning Method ◽  
Potential Applications ◽  
Synthesis Procedure

This article reports on the synthesis procedure of ZnO nanoparticles/nanofibers structure by electrospinning method using Zinc acetate and polyvinylpyrrolidone (PVP) surfactant as reagents and evaluates their luminescent properties. The microstructure of ZnO nanoparticles/nanofibers was observed by FE-SEM. The phase formation of ZnO nanoparticles/nanofibers was studied by XRD. ZnO nanoparticles/nanofibers structure shows strong luminescence centering at 660 nm, which has potential applications in solid-state lighting.

Combustion Synthesis of CaMoO4:Eu3+, Li+ Red Phosphors Using Urea-Thiourea Mixture Fuels

2013 ◽  
Vol 652-654 ◽  
pp. 546-549
Author(s):  
Xia Wang ◽  
Yu Zhi Feng ◽  
Gui Hua Peng ◽  
Zhen Hua Liang ◽  
Xiao Bao Han
Keyword(s):  
Combustion Synthesis ◽  
Crystalline Phase ◽  
Tetragonal Phase ◽  
Luminescent Properties ◽  
Luminescent Intensity ◽  
Red Emission ◽  
Red Phosphors ◽  
Chromaticity Coordinates ◽  
Standard Values ◽  
Diffraction Peaks

The CaMoO4:Eu3+, Li+ red phosphors were synthesized by combustion synthesis with urea or urea-thiourea as fuels, and their crystalline phase, morphology and luminescent properties were investigated. The XRD results demonstrated that all the diffraction peaks of the products can be well indexed to the pure tetragonal phase of CaMoO4. The SEM photographs showed that the particles of sample using urea as fuel are agglomeration, while the particles of sample using urea-thiourea mixture fuels are non-agglomeration. The powder can be effectively excited by ultraviolet with wavelength of 395 nm, and exhibits a strong red emission with maximum wavelength at 615 nm. The luminescent intensity of the phosphor with mixture fuels had 2.2 times stronger than that of the phosphor with single fuel, and its chromaticity coordinates (0.65, 0.35) was closer to NTSC standard values (0.67, 0.33).

Hydrothermal approach and luminescent properties for the synthesis of orthoniobates GdNbO4:Ln3+ (Ln = Dy, Eu) single crystals under high-temperature high-pressure conditions

2014 ◽  
Vol 38 (9) ◽  
pp. 4249-4257 ◽  
Author(s):  
Min Yang ◽  
Xudong Zhao ◽  
Ying Ji ◽  
Fuyang Liu ◽  
Wei Liu ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Solid State ◽  
Single Crystal ◽  
Single Crystals ◽  
Luminescent Properties ◽  
Solid State Lighting ◽  
Potential Applications ◽  
Hydrothermal Approach ◽  
High Temperature High Pressure

GdNbO4:Ln3+ (Ln = Dy, Eu) single crystal phosphors are very important for potential applications in optoelectronics and solid-state lighting for general illumination.

Synthesis and Luminescent Properties of Europium Doped Zirconia Nanoparticles

2020 ◽  
Vol 985 ◽  
pp. 177-184
Author(s):  
Hoang Viet Nguyen ◽  
Van Huan Pham ◽  
Vuong Hung Pham
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Hydrothermal Method ◽  
Ph Value ◽  
Luminescent Properties ◽  
Solid State Lighting ◽  
Hydrothermal Time ◽  
Hydrothermal Temperature ◽  
Potential Applications ◽  
Zirconia Nanoparticles

This paper reports a tunable luminescence of europium (Eu 3+) doped zirconia (ZrO2) nanoparticles as a function of hydrothermal temperature, europium concentrations, time and pH value. The nano-sized Eu doped ZrO2 (Eu:ZrO2) particle was synthesized by hydrothermal method at the temperature of 200 °C and time up to 48 h. The nano-sized Eu:ZrO2 particles have a diameter of about 10 nm. The luminescent properties of nano-sized Eu:ZrO2 particle was enhanced in the sample when high temperature, high Eu 3+ concentration and prolonging hydrothermal time were used at pH 7. These results suggest the use of Eu:ZrO2 nanoparticles followed by thermal annealing in tuning the luminescence of Eu:ZrO2 nanoparticles which have potential applications as phosphors in solid state lighting.

Intense multi-state visible absorption and full-color luminescence of nitrogen-doped carbon quantum dots for blue-light-excitable solid-state-lighting

2016 ◽  
Vol 4 (38) ◽  
pp. 9027-9035 ◽  
Author(s):  
Daqin Chen ◽  
Weiwei Wu ◽  
Yongjun Yuan ◽  
Yang Zhou ◽  
Zhongyi Wan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solid State ◽  
Carbon Quantum Dots ◽  
Solid State Lighting ◽  
Visible Absorption ◽  
Nitrogen Doped ◽  
Full Color ◽  
Potential Applications ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

Nitrogen-doped carbon dots with multi-state visible absorption and full-color blue/yellow/red emissions are synthesized, and show potential applications in solid-state-lighting.

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.

Promising red phosphors LaNbO4:Eu3+, Bi3+ for LED solid-state lighting application

2010 ◽  
Vol 28 (3) ◽  
pp. 356-360 ◽  
Author(s):  
Junli HUANG ◽  
Liya ZHOU ◽  
Zhaoping LIANG ◽  
Fuzhong GONG ◽  
Jianpeng HAN ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Lighting ◽  
Red Phosphors ◽  
Lighting Application

Novel Mn4+-activated layered oxide-fluoride perovskite-type KNaMoO2F4 red phosphor for wide gamut warm white light-emitting diodes backlight

2021 ◽  
Author(s):  
Jiao Wu ◽  
Bo Wang ◽  
Zhiyuan Liu ◽  
Kang Zhang ◽  
Xiaoshuang Li ◽  
...  
Keyword(s):  
Solid State ◽  
White Light ◽  
Light Emitting Diodes ◽  
Solid State Lighting ◽  
Red Phosphor ◽  
Red Emission ◽  
Light Emitting ◽  
Warm White Light ◽  
White Light Emitting Diodes ◽  
Perovskite Type

Mn4+-activated oxidefluoride phosphors are attractive for application in wide solid-state lighting devices because of its distinct red emission at about 630 nm and the abundant storage of Mn4+ ion. However,...

Structural, luminescent properties and Judd-Ofelt analysis of CaMgSiO4:Eu3+ phosphor for solid state lighting

2021 ◽  
pp. 111787
Author(s):  
Bhuneshwar Verma ◽  
R.N. Baghel ◽  
D.P. Bisen ◽  
N. Brahme ◽  
V. Jena
Keyword(s):  
Solid State ◽  
Luminescent Properties ◽  
Solid State Lighting
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