Fast synthesis of red Li3BaSrLn3(WO4)8:Eu3+phosphors for white LEDs under near-UV excitation by a microwave-assisted solid state reaction method and photoluminescence studies

2015 ◽  
Vol 3 (47) ◽  
pp. 12322-12327 ◽  
Author(s):  
Bo Wei ◽  
Zhenyu Liu ◽  
Chen Xie ◽  
Shu Yang ◽  
Wentao Tang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Solid State ◽  
High Purity ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
White Leds ◽  
Microwave Assisted ◽  
Photoluminescence Studies ◽  
Fast Synthesis ◽  
Uv Excitation

Highly efficient red Li3BaSrLa3(WO4)8:90at%Eu3+phosphors have been synthesized for NUV-excited WLEDs with impressive thermal stability and high purity emission.

Synthesis, photoluminescence and Judd–Ofelt analysis of red LiGd5P2O13 : Eu3+ phosphors for white LEDs

RSC Advances ◽  
2015 ◽  
Vol 5 (67) ◽  
pp. 54622-54628 ◽  
Author(s):  
Xinguo Zhang ◽  
Liya Zhou ◽  
Qi Pang ◽  
Menglian Gong
Keyword(s):  
Thermal Stability ◽  
Solid State ◽  
Quantum Yield ◽  
Solid State Reaction ◽  
Red Light ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
White Leds ◽  
Good Thermal Stability ◽  
Red Phosphors

LiGd5P2O13 : Eu3+ red phosphors were prepared by solid-state reaction method. Phosphors could be efficiently excited by NUV/blue light and emit pure-red light. LiGd5P2O13 : Eu3+ shows good thermal stability with quantum yield of 46.5%.

Synthesis and photoluminescence of green-emitting Ce3+,Tb3+ co-doped Al6Si2O13 phosphors with high thermal stability for white LEDs

RSC Advances ◽  
2016 ◽  
Vol 6 (49) ◽  
pp. 42770-42777 ◽  
Author(s):  
Gui-Gen Wang ◽  
Xiao-Fei Wang ◽  
Li-Wen Dong ◽  
Qi Yang
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Solid State ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
High Thermal Stability ◽  
Reaction Method ◽  
White Leds ◽  
Good Thermal Stability ◽  
Co Doped

In this article, novel green-emitting Ce3+, Tb3+ co-doped Al6Si2O13 phosphors with good thermal stability have been successfully prepared by high-temperature solid-state reaction method.

Photoluminescence properties of single-component white-emitting Ca9Bi(PO4)7:Ce3+,Tb3+,Mn2+phosphors for UV LEDs

2015 ◽  
Vol 3 (27) ◽  
pp. 7096-7104 ◽  
Author(s):  
Kai Li ◽  
Mengmeng Shang ◽  
Yang Zhang ◽  
Jian Fan ◽  
Hongzhou Lian ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid State ◽  
White Light ◽  
Solid State Reaction Method ◽  
Photoluminescence Properties ◽  
Light Emitting ◽  
Reaction Method ◽  
White Light Emitting Diodes ◽  
Uv Leds ◽  
Uv Excitation

A series of Ca9Bi(PO4)7:Ce3+,Tb3+,Mn2+phosphors synthesizedviathe high-temperature solid-state reaction method can emit intense tunable color from purple-blue to red including white under UV excitation, which shows their potential application in UV-pumped white-light-emitting diodes.

Effects of Sm3+ Doping on the Photoluminescence Properties of Ca9Eu1-xSmx(VO4)7 Red-Emitting Phosphors

2012 ◽  
Vol 512-515 ◽  
pp. 1488-1493 ◽  
Author(s):  
Li Hong Liu ◽  
Rong Jun Xie ◽  
Xu Dong Sun ◽  
Qing Huang ◽  
Naoto Hirosaki
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Excitation Energy ◽  
Solid State Reaction ◽  
Emission Intensity ◽  
Solid State Reaction Method ◽  
Photoluminescence Properties ◽  
Reaction Method ◽  
White Leds ◽  
Uv Led

This paper reports the photoluminescence properties of Ca9Eu1-xSmx(VO4)7 (x=0.2-0.4) synthesized at 1250 oC in air for 12 h using traditional solid-state reaction method. With the increase of Sm3+ substitution amount, purity Ca9Eu1-xSmx(VO4)7 phase was obtained even when the Eu3+ ions were totally substituted by Sm3+. The experimental results showed that when Sm3+ was codoped with Eu3+ into Ca9Eu1-xSmx(VO4)7 crystal structure, Sm3+ would act as a sensitizer and transfer the excitation energy to Eu3+ ions and finally enhance the emission intensity of Ca9Eu1-xSmx(VO4)7 under 405 nm excitation, which leads to more favorite of this kind of phosphor used in UV LED based white LEDs.

An efficient green-emitting α-Ca1.65Sr0.35SiO4:Eu2+ phosphor for UV/n-UV w-LEDs: synthesis, luminescence and thermal properties

2015 ◽  
Vol 3 (24) ◽  
pp. 6341-6349 ◽  
Author(s):  
Kai Li ◽  
Ju Xu ◽  
Xuechao Cai ◽  
Jian Fan ◽  
Yang Zhang ◽  
...  
Keyword(s):  
Thermal Properties ◽  
High Temperature ◽  
Solid State ◽  
White Light ◽  
Green Light ◽  
Solid State Reaction Method ◽  
Light Emitting ◽  
Reaction Method ◽  
White Light Emitting Diodes ◽  
Uv Excitation

A series of Eu2+-doped α-Ca1.65Sr0.35SiO4 phosphors synthesized via the high-temperature solid-state reaction method can emit intense green light under UV/n-UV excitation, which show potential application in UV/n-UV-pumped white-light-emitting diodes.

Influence of Sintering Temperatures on Microstructures and the Thermal Conductivity of CuAlO2 Ceramics

2016 ◽  
Vol 848 ◽  
pp. 222-227 ◽  
Author(s):  
Zi Jun Song ◽  
Lian Jun Wang ◽  
Wan Jiang ◽  
Wei Luo
Keyword(s):  
Thermal Conductivity ◽  
Thermal Stability ◽  
Solid State ◽  
Room Temperature ◽  
Solid State Reaction Method ◽  
Oxide Ceramic ◽  
Synthetic Process ◽  
Reaction Method ◽  
Environmental Friendly ◽  
Different Temperatures

Oxide ceramic is a kind of environmental friendly materials, which has attracted more and more interests for its bunch of advantages such as sound chemical, thermal stability, simple synthetic process, cheap price, harmless and safety. Therefore, Oxide ceramic will be a promising material in the future. In this work, polycrystalline samples of CuAlO2 were prepared by a solid state reaction method. The mixture of pure CuO and Al2O3 powders was firstly pressed under the pressure of 60 MPa, and then 200 MPa to prepare pellets of 5 mm thick and 10 mm in diameter. The green compacts were sintered at five different temperatures (1273 K, 1323 K, 1373 K, 1423 K, 1473 K) for various holding times (5 h, 10 h and 15 h) in the air and then the furnace cooled. The crystalline and microstructures of the sintered CuAlO2 bodies were detected by XRD and SEM. The properties of density, thermal conductivity were also investigated in detail. The experimental results show that CuAlO2 bodies were rhombohedral, belonging to R3m space group. It is found that the density and the thermal conductivity of CuAlO2 ceramics were significantly dependent on the sintering temperatures. The density and thermal conductivity increased with increasing the sintering temperatures. The thermal conductivity of samples sintered at 1273 and 1473 K with the same holding time (10 h) were 9.70 and 35.53 W/mk at the room temperature, 3.41 and 8.29 W/mk at 1100 K, respectively.

Tunable blue-green emitting and energy transfer of a Eu2+/Tb3+ codoped Sr3La(PO4)3 phosphor for near-UV white LEDs

2015 ◽  
Vol 39 (11) ◽  
pp. 8933-8939 ◽  
Author(s):  
Qiongyu Bai ◽  
Zhijun Wang ◽  
Panlai Li ◽  
Shuchao Xu ◽  
Ting Li ◽  
...  
Keyword(s):  
Energy Transfer ◽  
High Temperature ◽  
Solid State ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
White Leds

A series of Eu2+ and Tb3+ doped Sr3La(PO4)3 phosphors have been synthesized via the high-temperature solid-state reaction method.

scholarly journals Effect of ZnO on (ferroelectric) fatigue retention and thermal stability of ferroelectric properties in lead free (K0.5Na0.5)(Nb0.7Ta0.3)O3 ceramics

RSC Advances ◽  
2019 ◽  
Vol 9 (60) ◽  
pp. 34888-34895
Author(s):  
Vineetha P ◽  
Roshan Jose ◽  
K. Venkata Saravanan
Keyword(s):  
Thermal Stability ◽  
Solid State ◽  
Solid State Reaction ◽  
Ferroelectric Properties ◽  
Solid State Reaction Method ◽  
Lead Free ◽  
Reaction Method ◽  
Thermal Stability Of

This work investigates and reports the effect of ZnO addition on the ferroelectric properties of (K0.5Na0.5)(Nb0.7Ta0.3)O3 (KNNT) ceramics prepared by a solid state reaction method.

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