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.

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.

scholarly journals Synthesis and luminescent properties of novel red-emitting M7Sn(PO4)6:Eu3+(M= Sr,Ba) phosphors

2018 ◽  
Vol 12 (1) ◽  
pp. 8-12
Author(s):  
Guo Feng ◽  
Weihui Jiang ◽  
Jianmin Liu ◽  
Cong Li ◽  
Quan Zhang
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Red Light ◽  
Luminescent Properties ◽  
Solid State Reaction Method ◽  
Formula Unit ◽  
Conventional Solid State Reaction ◽  
Light Emitting ◽  
Reaction Method ◽  
Uv Leds

Novel Eu3+-activated M7Sn(PO4)6 (where M = Sr, Ba) red-emitting phosphors were synthesized via conventional solid-state reaction method at 1200 ?C for 2 h. The luminescence properties of the prepared samples and quenching concentration of Sr7-xSn(PO4)6 :xEu3+ and Ba7-xSn(PO4)6 :xEu3+ were investigated. These phosphors can be efficiently excited by UV (395 nm) and visible blue (465 nm) light nicely matching the output wavelengths of the near-UV LEDs and InGaN blue LED chips and emit the red light. The critical concentrations of the Eu3+ activator were found to be 0.175mol and 0.21mol per formula unit for Sr7-xSn(PO4)6 :xEu3+ and Ba7-xSn(PO4)6 :xEu3+, respectively. The M7-xSn(PO4)6 :xEu3+ (M = Sr, Ba) phosphor may be a good candidate for light-emitting diodes application.

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.

Efficient and thermally stable blue-emitting Ce3+ doped LaAl(Si6−zAlz)(N10−zOz) (JEM:Ce) phosphors for white LEDs

2017 ◽  
Vol 5 (32) ◽  
pp. 8295-8300 ◽  
Author(s):  
Chun-Yun Wang ◽  
Otmar Melvin ten Kate ◽  
Takashi Takeda ◽  
Naoto Hirosaki
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Gas Pressure ◽  
Thermally Stable ◽  
Reaction Method ◽  
White Leds

La2O3, LaN, Si3N4, AlN and CeO2 have been used as starting materials to synthesize Ce doped LaAl(Si6−zAlz)(N10−zOz) (z ≈ 1, termed the JEM phase) phosphors, via a solid-state reaction method in a gas pressure furnace at a high temperature.

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.

scholarly journals Grain size effect on piezoelectric properties of Sr2Nb2O7 ceramics

2018 ◽  
Vol 08 (04) ◽  
pp. 1820003 ◽  
Author(s):  
Tao Chen ◽  
Zhiyong Zhou ◽  
Ruihong Liang ◽  
Xianlin Dong
Keyword(s):  
Thermal Stability ◽  
Grain Size ◽  
Solid State ◽  
Size Effect ◽  
Solid State Reaction ◽  
Piezoelectric Properties ◽  
Solid State Reaction Method ◽  
Grain Size Effect ◽  
Reaction Method ◽  
Grain Sizes

Grain size effect on piezoelectric properties and thermal stability of perovskite layer structured (PLS) Sr2Nb2O7 ceramics are investigated. The Sr2Nb2O7 ceramics with different average grain sizes from 1.2[Formula: see text][Formula: see text]m to 3.6[Formula: see text][Formula: see text]m were prepared in different sintering temperatures by solid state reaction method. The average grain size increases, accompanied by a higher relative density of up to 96%. Pure Sr2Nb2O7 ceramics with larger grain size show a remarkable [Formula: see text] of ([Formula: see text])pC/N while still with a very high [Formula: see text] of ([Formula: see text]C. The thermal depolarization temperature of samples with large grain sizes reach over 1200∘C and the thermal stability increased with increasing of grain size. The ferroelectric domains structure was observed by PFM and larger grain is easy to form ferroelectric domain then enhance piezoelectric properties. This study demonstrates enhanced piezoelectric properties can be achieved in pure Sr2Nb2O7 by solid state reaction method and bring great revitalization to the Sr2Nb2O7-based ceramics as a promising high-temperature piezoelectric material.

scholarly journals Tuning of luminescence properties by controlling an aid-sintering additive and composition in Na(Ba/Sr/Ca)PO4:Eu2+ for white LEDs

RSC Advances ◽  
2017 ◽  
Vol 7 (36) ◽  
pp. 22301-22310 ◽  
Author(s):  
Qiongyu Bai ◽  
Panlai Li ◽  
Zhijun Wang ◽  
Shuchao Xu ◽  
Ting Li ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Luminescence Properties ◽  
Reaction Method ◽  
White Leds ◽  
Sintering Additive

A series of Na(Ba/Sr/Ca)PO4:Eu2+ phosphors were prepared via a high-temperature solid-state reaction method.

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