A highly-efficient blue-light excitable red phosphor: intramolecular π-stacking interactions in one dinuclear europium(iii) complex

2016 ◽  
Vol 45 (7) ◽  
pp. 2839-2844 ◽  
Author(s):  
Zhengliang Wang ◽  
Hui Yang ◽  
Pei He ◽  
Yonghui He ◽  
Jishou Zhao ◽  
...  
Keyword(s):  
Blue Light ◽  
Stacking Interactions ◽  
Red Phosphor ◽  
Red Emission ◽  
Highly Efficient ◽  
Π Stacking ◽  
Light Excitation

The europium(iii) complex [Eu2(2,7-BTFDBC)(DBM)4(Phen)2] with multiple T-shaped and parallel-displaced π-stacking interactions exhibits intense red emission under blue light excitation with high colour purity.

A new red phosphor BaGeF6:Mn4+: hydrothermal synthesis, photo-luminescence properties, and its application in warm white LED devices

2015 ◽  
Vol 3 (13) ◽  
pp. 3055-3059 ◽  
Author(s):  
Qiang Zhou ◽  
Yayun Zhou ◽  
Yong Liu ◽  
Lijun Luo ◽  
Zhengliang Wang ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Blue Light ◽  
Photo Luminescence ◽  
Luminescence Properties ◽  
White Led ◽  
Hydrothermal Route ◽  
Red Phosphor ◽  
Red Emission ◽  
Light Excitation

A new red phosphor BaGeF6:Mn4+prepared by a hydrothermal route shows intense red emission under blue light excitation, which may find application in warm white LED devices.

Highly efficient red phosphor Cs2GeF6:Mn4+for warm white light-emitting diodes

RSC Advances ◽  
2015 ◽  
Vol 5 (100) ◽  
pp. 82409-82414 ◽  
Author(s):  
Zhengliang Wang ◽  
Yayun Zhou ◽  
Yong Liu ◽  
Qiang Zhou ◽  
Lijun Luo ◽  
...  
Keyword(s):  
Cation Exchange ◽  
White Light ◽  
Light Emitting Diodes ◽  
Exchange Method ◽  
Red Phosphor ◽  
Red Emission ◽  
Light Emitting ◽  
Highly Efficient ◽  
Warm White Light ◽  
White Light Emitting Diodes

Red phosphor Cs2GeF6:Mn4+synthesized by the cation exchange method exhibits an intense red emission with a high colour-purity. The warm WLED fabricated with this phosphor emits an intense white light under 20 mA current excitation.

Structural design enables highly-efficient green emission with preferable blue light excitation from zero-dimensional manganese (II) hybrids

2021 ◽  
Vol 421 ◽  
pp. 129886
Author(s):  
Shuai Zhang ◽  
Yifei Zhao ◽  
Jiadong Zhou ◽  
Hong Ming ◽  
Chun-Hai Wang ◽  
...  
Keyword(s):  
Blue Light ◽  
Structural Design ◽  
Green Emission ◽  
Highly Efficient ◽  
Light Excitation

Blue-light-excited narrowing red photoluminescence in lead-free double perovskite Cs2−xKxAg0.6Na0.4In0.8Bi0.2Cl6−xBrx with cryogenic effects

2021 ◽  
Author(s):  
Xiao-Kai Gong ◽  
Xiao-Song Zhang ◽  
Lan Li ◽  
Jian-Ping Xu ◽  
Ru-Kun Ding ◽  
...  
Keyword(s):  
Blue Light ◽  
Low Temperatures ◽  
Double Perovskite ◽  
Lead Free ◽  
Red Emission ◽  
Transition Mode ◽  
Light Excitation

The addition of KBr changed the original transition mode of the material and realized the blue-light excitation and narrow red emission of Cs2AgInCl6 at low temperatures.

A strong zero-phonon line red phosphor BaNbF7:Mn4+ for white LEDs

2020 ◽  
Vol 7 (18) ◽  
pp. 3371-3378
Author(s):  
Yang Zhou ◽  
Xiaoming Wang ◽  
Cuiping Wang ◽  
Tian Zhang ◽  
Yonggang Wang ◽  
...  
Keyword(s):  
Blue Light ◽  
Emission Intensity ◽  
Precipitation Method ◽  
Zero Phonon Line ◽  
Red Phosphor ◽  
Phonon Line ◽  
White Leds ◽  
Light Excitation ◽  
Co Precipitation

A novel red fluoride phosphor BaNbF7:Mn4+ was synthesized by co-precipitation method. Under UV and blue light excitation, this phosphor shows strong ZPL emission intensity at 630 nm and which makes it an attractive red phosphor candidate for WLEDs.

Crystal structure, photoluminescence and afterglow properties of red-emitting phosphors Ca4Nb2O9:Pr3+ for AC-LEDs

2021 ◽  
Vol 45 (1) ◽  
pp. 66-75 ◽  
Author(s):  
Pengfei Zhang ◽  
Na Li ◽  
Zhiting Wei ◽  
Ziqi Wang ◽  
Mengwei Gou ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Blue Light ◽  
Red Emission ◽  
Light Excitation ◽  
Time Gap

A novel Ca4Nb2O9:Pr3+ short-afterglow phosphor exhibits efficient red emission under blue light excitation, which can be used to compensate the time gap of AC-LEDs.

Novel red-emitting phosphors A2HfF6:Mn4+(A = Rb+, Cs+) for solid-state lighting

2017 ◽  
Vol 46 (29) ◽  
pp. 9451-9456 ◽  
Author(s):  
Zhaofeng Yang ◽  
Qianwen Wei ◽  
Meizhu Rong ◽  
Zhiyu Yang ◽  
Zhengliang Wang ◽  
...  
Keyword(s):  
Solid State ◽  
Blue Light ◽  
Potential Application ◽  
Solid State Lighting ◽  
Red Emission ◽  
Regular Octahedron ◽  
Light Excitation

New red-emitting phosphors A2HfF6(A = Rb+, Cs+) doped with Mn4+located at the center of a regular octahedron show intense red emission under blue light excitation and find potential application in LED chips.

Red Luminescence Properties of TiZn2O4 Phosphor

2017 ◽  
Vol 864 ◽  
pp. 94-99
Author(s):  
Sung Sik Chang
Keyword(s):  
Decay Time ◽  
Visible Spectrum ◽  
Scanning Electron Micrographs ◽  
X Ray Diffraction ◽  
Excitation Spectra ◽  
Red Phosphor ◽  
Red Emission ◽  
Light Excitation ◽  
Red Luminescence ◽  
Simple Solid State Reaction

The red phosphor (TiZn2O4) is formed from TiO2 and ZnO via simple solid-state reaction. This red phosphor is prepared by chemically stable as well as inexpensive oxide materials. Emission and excitation spectra are investigated for this phosphor. Photoluminescence (PL) measurements reveal that this phosphor emits bright red emission at 611 nm, which is associated with 5D0 – 7F2 transition, with near UV (395 nm) and blue light excitation (470 nm). The measured decay time of this red emission can be fitted well with a fast decay time of 67 ms and a slow decay time of 208 ms, respectively. A broad grain size distribution is observed for TiZn2O4 phosphor. Further, photoluminescence excitation (PLE) shows a good absorption band near UV, and the blue spectral region of visible spectrum as well. The optical properties, X-ray diffraction (XRD) measurements, and scanning electron micrographs (SEM) of this TiZn2O4 phosphor are studied.

Self-Recognizing π-π Stacking Interactions Designed for the Generation of Ultrastable Mesoporous Hydrogen-Bonded Organic Frameworks

2019 ◽  
Author(s):  
KAIKAI MA ◽  
Peng Li ◽  
John Xin ◽  
Yongwei Chen ◽  
Zhijie Chen ◽  
...  
Keyword(s):  
Pore Size ◽  
Fiber Composite ◽  
Aqueous Media ◽  
Stacking Interactions ◽  
Mustard Gas ◽  
X Ray Diffraction ◽  
X Ray ◽  
Expansion Strategy ◽  
Π Stacking ◽  
Hydrogen Bonded

Creating crystalline porous materials with large pores is typically challenging due to undesired interpen-etration, staggered stacking, or weakened framework stability. Here, we report a pore size expansion strategy by self-recognizing π-π stacking interactions in a series of two-dimensional (2D) hydrogen–bonded organic frameworks (HOFs), HOF-10x (x=0,1,2), self-assembled from pyrene-based tectons with systematic elongation of π-conjugated molecular arms. This strategy successfully avoids interpene-tration or staggered stacking and expands the pore size of HOF materials to access mesoporous HOF-102, which features a surface area of ~ 2,500 m2/g and the largest pore volume (1.3 cm3/g) to date among all reported HOFs. More importantly, HOF-102 shows significantly enhanced thermal and chemical stability as evidenced by powder x-ray diffraction and N2 isotherms after treatments in chal-lenging conditions. Such stability enables the adsorption of dyes and cytochrome c from aqueous media by HOF-102 and affords a processible HOF-102/fiber composite for the efficient photochemical detox-ification of a mustard gas simulant.

scholarly journals Unprecedented Coordination-Induced Bright Red Emission from Group 12 Metal-Bound Triarylazoimidazoles

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1739
Author(s):  
Artyom A. Astafiev ◽  
Olga V. Repina ◽  
Boris S. Tupertsev ◽  
Alexey A. Nazarov ◽  
Maria R. Gonchar ◽  
...  
Keyword(s):  
Visible Light ◽  
Metal Complexes ◽  
Scientific Literature ◽  
Photo Luminescence ◽  
Red Emission ◽  
The Past ◽  
Highly Efficient ◽  
Luminescence Emission ◽  
New Family ◽  
Group 12

Arylazoimidazoles are important dyes which were intensively studied in the past. In contrast, triarylazoimidazoles (derivatives which carry aryl substituents at the imidazole core) received almost no attention in the scientific literature. Here, we report a new family of simple and easily accessible triarylazoimidazole-group 12 metal complexes, which feature highly efficient photo-luminescence emission (Φ up to  0.44). Novel compounds exhibit bright red emission in solution, which could be excited with a visible light.

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