Manipulation of Cl/Br Transmutation in Zero-Dimensional Mn2+-Based Metal Halides toward Tunable Photoluminescence and Thermal Quenching Behaviors

2021 ◽  
Author(s):  
Guojun Zhou ◽  
Zhiyang Liu ◽  
Maxim S. Molokeev ◽  
Zewen Xiao ◽  
Zhiguo Xia ◽  
...  
Keyword(s):  
Solid State ◽  
Thermal Quenching ◽  
Lead Toxicity ◽  
Solid State Lighting ◽  
Metal Halides ◽  
Low Dimensional ◽  
Poor Stability

Low-dimensional-networked metal halides are attractive for the screening of emitters applied in solid-state lighting and display, but the lead toxicity and poor stability are obstacles that must be overcome in...

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.

Preparation of zero-thermal-quenching tunable emission bismuth-containing phosphors through topochemical design of ligand configuration

2021 ◽  
Author(s):  
Qincan Ma ◽  
Ning Guo ◽  
Baiqi Shao ◽  
Yanmei Xin
Keyword(s):  
Solid State ◽  
Optical Sensing ◽  
Thermal Quenching ◽  
Solid State Lighting ◽  
Luminescence Properties ◽  
Luminescent Materials ◽  
Tunable Emission

Bismuth-doped luminescent materials have obtained widespread attention for solid state lighting and optical sensing due to their excellent luminescence properties and preparation in a non-reducing green environment. However, the luminescence...

Red-emitting phosphors APF6:Mn4+ (A = Cs+, Rb+, K+): synthesis, luminescence properties and application in solid-state lighting

2019 ◽  
Vol 48 (29) ◽  
pp. 10901-10906 ◽  
Author(s):  
Yu Chen ◽  
Zhaofeng Yang ◽  
Qin Wang ◽  
Meizhu Rong ◽  
Qiang Zhou ◽  
...  
Keyword(s):  
Solid State ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Thermal Quenching ◽  
Solid State Lighting ◽  
Luminescence Properties ◽  
Red Emission ◽  
White Leds

New red-emitting phosphors APF6:Mn4+ (A = Cs+, Rb+, K+) show intense red emission with high external quantum efficiency and thermal quenching resistance for warm white LEDs.

Solid-State Lighting R&D Plan - 2015

2015 ◽  
Author(s):  
Norman Bardsley ◽  
Stephen Bland ◽  
Monica Hansen ◽  
Lisa Pattison ◽  
Morgan Pattison ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Lighting
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