Core–shell structured CaS:Eu2+@CaZnOS via inward erosion growth to realize a super stable chalcogenide red phosphor

2019 ◽  
Vol 7 (20) ◽  
pp. 5931-5936 ◽  
Author(s):  
Xiaofang Wang ◽  
Zhongxian Qiu ◽  
Yanmei Li ◽  
Qinghua Mi ◽  
Wenli Zhou ◽  
...  
Keyword(s):  
Thermal Quenching ◽  
Core Shell ◽  
Red Phosphor

The fabrication of a CaZnOS shell prevents hydrolysis towards water and acid, and thermal quenching from heat of the red-emitting CaS:Eu2+ core.

scholarly journals Synthesis, structure and optical performance of red-emitting phosphor Ba5AlF13:Mn4+

RSC Advances ◽  
2017 ◽  
Vol 7 (78) ◽  
pp. 49473-49479 ◽  
Author(s):  
Lin Qin ◽  
Peiqing Cai ◽  
Cuili Chen ◽  
Jing Wang ◽  
Hyo Jin Seo
Keyword(s):  
Thermal Quenching ◽  
Optical Performance ◽  
Red Phosphor ◽  
Red Emitting Phosphor

A novel Ba5AlF13:Mn4+red phosphor which shows significant anti-thermal quenching behavior.

Novel La3GaGe5O16 : Mn4+based deep red phosphor: a potential color converter for warm white light

RSC Advances ◽  
2015 ◽  
Vol 5 (110) ◽  
pp. 90499-90507 ◽  
Author(s):  
Shaoan Zhang ◽  
Yihua Hu ◽  
He Duan ◽  
Li Chen ◽  
Yinrong Fu ◽  
...  
Keyword(s):  
Activation Energy ◽  
White Light ◽  
Thermal Quenching ◽  
Temperature Dependent ◽  
Quenching Temperature ◽  
Red Phosphor ◽  
Warm White Light ◽  
Relative Emission Intensity ◽  
Insight Into ◽  
Color Converter

We gained insight into the temperature-dependent relative emission intensity of La3GaGe5O16: Mn4+phosphor, and the luminescence quenching temperature and the activation energy for thermal quenching (ΔE) were obtained.

Negative thermal quenching of photoluminescence in annealed ZnO–Al2O3 core–shell nanorods

2015 ◽  
Vol 17 (7) ◽  
pp. 5360-5365 ◽  
Author(s):  
Yukun Wu ◽  
Junwen Li ◽  
Huaiyi Ding ◽  
Zhiwei Gao ◽  
Yiming Wu ◽  
...  
Keyword(s):  
Thermal Quenching ◽  
Annealing Process ◽  
Core Shell

Negative thermal quenching behavior of photoluminescence is observed in the annealed ZnO–Al2O3 core–shell nanorods, which is originated from the Al donor in ZnO induced through an annealing process.

Application of Nitride and Oxynitride Compounds to Various Phosphors for White LED

2008 ◽  
Vol 403 ◽  
pp. 15-18 ◽  
Author(s):  
Kyota Uheda
Keyword(s):  
Rare Earth ◽  
Thermal Quenching ◽  
Rare Earth Ions ◽  
White Led ◽  
Green Phosphor ◽  
Strong Emission ◽  
Red Phosphor ◽  
Blue Phosphor ◽  
Uv Led ◽  
Intense Emission

Multiternary nitride and oxynitride compounds doped with rare earth ions, such as Eu2+ and Ce3+ have been enthusiastically applied as various phosphors to white LED. New red and green phosphors, CaAlSiN3:Eu and Ba3Si6O12N2:Eu, have been successfully synthesized, recently. The red phosphor has intense emission around 650 nm under two different irradiations at 405 and 455 nm from blue- and near UV-LED chips, respectively; while strong emission is observed around 520 nm from the green phosphor. Both phosphors also show small thermal quenching over the temperatures up to 150 °C. In addition, both LaSi3N5:Ce and La3Si8O4N11:Ce in lanthanum silicon nitride and oxynitride were examined as candidates for a blue phosphor in white LED with near UV-LED chip.

scholarly journals Thermal Quenching Mechanism of CaAlSiN3:Eu2+ Red Phosphor

2018 ◽  
Vol 91 (2) ◽  
pp. 173-177 ◽  
Author(s):  
Jumpei Ueda ◽  
Setsuhisa Tanabe ◽  
Kohsei Takahashi ◽  
Takashi Takeda ◽  
Naoto Hirosaki
Keyword(s):  
Thermal Quenching ◽  
Quenching Mechanism ◽  
Red Phosphor

Achieving zero-thermal quenching luminescence in ZnGa2O4: 0.02Eu3+ red phosphor

2021 ◽  
pp. 162786
Author(s):  
Yanzhen Yin ◽  
Wenhua Yang ◽  
Zhen Wang ◽  
Yue Zhang ◽  
Maochen Zhu ◽  
...  
Keyword(s):  
Thermal Quenching ◽  
Red Phosphor

Enhancing negative thermal quenching effect via low-valence doping in two-dimensional confined core–shell upconversion nanocrystals

2018 ◽  
Vol 6 (43) ◽  
pp. 11587-11592 ◽  
Author(s):  
Lei Lei ◽  
Jienan Xia ◽  
Yao Cheng ◽  
Yuansheng Wang ◽  
Gongxun Bai ◽  
...  
Keyword(s):  
Emission Intensity ◽  
Thermal Quenching ◽  
Core Shell ◽  
Two Dimensional ◽  
Quenching Effect ◽  
Upconversion Nanocrystals

Doping low-valence ions in core–shell NC is applied to improve negative thermal quenching effect. With the increase in temperature from 293 to 413 K, the UC emission intensity of 20Yb/2Er : NaGdF4 (12 nm) increases by 2.2 times, whereas that of NaGdF4@20Ca/20Yb/2Er: NaGdF4 (11 nm) increases by 10.9 times.

scholarly journals Chemical heterogeneity and approaches to its control in BiFeO3–BaTiO3 lead-free ferroelectrics

2018 ◽  
Vol 6 (1) ◽  
pp. 134-146 ◽  
Author(s):  
Ilkan Calisir ◽  
David A. Hall
Keyword(s):  
Thermal Quenching ◽  
Lead Free ◽  
Chemical Heterogeneity ◽  
Core Shell ◽  
Dopant Incorporation ◽  
Switching Behaviour ◽  
Ferroelectric Switching

The formation of core–shell microstructures and ferroelectric switching behaviour in BiFeO3–BaTiO3 ceramics are controlled via dopant incorporation strategies and thermal quenching procedures.

scholarly journals Glass crystallization making red phosphor for high-power warm white lighting

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Tao Hu ◽  
Lixin Ning ◽  
Yan Gao ◽  
Jianwei Qiao ◽  
Enhai Song ◽  
...  
Keyword(s):  
Solid State ◽  
High Power ◽  
Rapid Development ◽  
Thermal Quenching ◽  
Luminous Flux ◽  
Aluminosilicate Glass ◽  
Solid State Lighting ◽  
Red Phosphor ◽  
Red Phosphors ◽  
Significant Step

AbstractRapid development of solid-state lighting technology requires new materials with highly efficient and stable luminescence, and especially relies on blue light pumped red phosphors for improved light quality. Herein, we discovered an unprecedented red-emitting Mg2Al4Si5O18:Eu2+ composite phosphor (λex = 450 nm, λem = 620 nm) via the crystallization of MgO–Al2O3–SiO2 aluminosilicate glass. Combined experimental measurement and first-principles calculations verify that Eu2+ dopants insert at the vacant channel of Mg2Al4Si5O18 crystal with six-fold coordination responsible for the peculiar red emission. Importantly, the resulting phosphor exhibits high internal/external quantum efficiency of 94.5/70.6%, and stable emission against thermal quenching, which reaches industry production. The maximum luminous flux and luminous efficiency of the constructed laser driven red emitting device reaches as high as 274 lm and 54 lm W−1, respectively. The combinations of extraordinary optical properties coupled with economically favorable and innovative preparation method indicate, that the Mg2Al4Si5O18:Eu2+ composite phosphor will provide a significant step towards the development of high-power solid-state lighting.

Sign in / Sign up

Export Citation Format

Share Document