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.

Novel Mn4+-activated layered oxide-fluoride perovskite-type KNaMoO2F4 red phosphor for wide gamut warm white light-emitting diodes backlight

2021 ◽  
Author(s):  
Jiao Wu ◽  
Bo Wang ◽  
Zhiyuan Liu ◽  
Kang Zhang ◽  
Xiaoshuang Li ◽  
...  
Keyword(s):  
Solid State ◽  
White Light ◽  
Light Emitting Diodes ◽  
Solid State Lighting ◽  
Red Phosphor ◽  
Red Emission ◽  
Light Emitting ◽  
Warm White Light ◽  
White Light Emitting Diodes ◽  
Perovskite Type

Mn4+-activated oxidefluoride phosphors are attractive for application in wide solid-state lighting devices because of its distinct red emission at about 630 nm and the abundant storage of Mn4+ ion. However,...

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.

scholarly journals Excitation-Independent Emission of Carbon Quantum Dot Solids

2020 ◽  
Vol 2020 ◽  
pp. 1-5
Author(s):  
Xuan-Dung Mai ◽  
Yen Thi Hai Phan ◽  
Van-Quang Nguyen
Keyword(s):  
Solid State ◽  
Solvothermal Method ◽  
Blue Emission ◽  
Carbon Quantum Dots ◽  
Solid State Lighting ◽  
Optical And Electrical Properties ◽  
Red Emission ◽  
Solid Films ◽  
Carbon Quantum Dot ◽  
S States

Solid assemblies of carbon quantum dots (CQDs) are important for diverse applications including LEDs, solar cells, and photosensors; their optical and electrical properties have not been explored yet. Herein, we used amphiphilic CQDs synthesized from citric acid and thiourea by a solvothermal method to fabricate CQD solid films. Optical properties of CQDs studied by UV-Vis and photoluminescence spectroscopies indicate that CQDs possess three different emission centers at 425 nm, 525 nm, and 625 nm originating from C sp2 states, N-states, and S-states, respectively. In a solid state, π-π stacking quenched the blue emission, while the red emission increased. Importantly, CQD films exhibited excitation independence, which is important to design solid-state lighting applications.

Blue Upconversion Luminescence from Phosphor Tm3+/Yb3+ Co-Doped Gd2Mo3O9

2013 ◽  
Vol 683 ◽  
pp. 3-6
Author(s):  
Jia Yue Sun ◽  
Bing Xue ◽  
Guang Chao Sun ◽  
Dian Peng Cui ◽  
Hai Yan Du
Keyword(s):  
Solid State ◽  
Upconversion Luminescence ◽  
Blue Emission ◽  
Solid State Reaction Method ◽  
Solid State Lighting ◽  
Red Emission ◽  
Reaction Method ◽  
X Ray ◽  
Strong Blue Emission ◽  
Co Doped

The upconversion (UC) luminescence properties of phosphor Tm3+/Yb3+co-doped Gd2Mo3O9were investigated in detail. Tm3+/Yb3+co-doped Gd2Mo3O9was prepared by solid-state reaction method using Na2CO3as flux and characterized by powder X-ray diffractometry. Under 980nm excitation, Tm3+/Yb3+co-doped Gd2Mo3O9has exhibited a weak red emission near 651nm and strong blue emission at 476nm. Tm3+/Yb3+co-doped Gd2Mo3O9phosphor has been considered as a better candidate in solid-state lighting applications.

Spectroscopic behavior of Eu3+ in SnO2 for tunable red emission in solid state lighting devices

RSC Advances ◽  
2015 ◽  
Vol 5 (63) ◽  
pp. 51102-51109 ◽  
Author(s):  
M. Chowdhury ◽  
S. K. Sharma
Keyword(s):  
Solid State ◽  
Spectroscopic Investigation ◽  
Solid State Lighting ◽  
Red Emission ◽  
Spectroscopic Behavior

This paper reports a spectroscopic investigation of Eu3+ doped SnO2 nanoparticles.

scholarly journals Tunable Yellow-Red Emission via Energy Transfer in Dy3+, Mn4+: NaLaMgWO6 Phosphors for UV-Excited LED

2021 ◽  
Author(s):  
yonghua wu ◽  
Fugui Yang ◽  
Fengpo Yan ◽  
Ruijuan Zuo
Keyword(s):  
Energy Transfer ◽  
Solid State ◽  
Solid State Reaction ◽  
Red Light ◽  
Emission Spectra ◽  
Excitation Source ◽  
Red Emission ◽  
Phase Purity ◽  
Emission Performance ◽  
Light Excitation

Abstract The Dy3+, Mn4+: NaLaMgWO6 phosphors are synthesized successfully using the technique of solid-state reaction at 1150 ℃. The XRD and SEM-EDS are measured to analyze the phase purity. The concentrations of Dy3+, Mn4+, Mg2+, Na+, La3+ and W6+ are measured by ICP. The absorption and excited spectra are presented, which indicate the 390 nm is suitable for the tunable yellow-red light excitation. Using the 390 nm LED as the excitation source, the emission spectra with different doped concentrations ratios of Dy3+to Mn4+ are obtained, which shows good tunable yellow-red emission performance.

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