Luminescence properties of Na2SiF6:Mn4+red phosphors for high colour-rendering white LED applications synthesized via a simple exothermic reduction reaction

2017 ◽  
Vol 1 (5) ◽  
pp. 928-932 ◽  
Author(s):  
Tian-Chun Lang ◽  
Tao Han ◽  
Ling-Ling Peng ◽  
Ming-Jing Tu
Keyword(s):  
Emission Spectra ◽  
Reduction Reaction ◽  
Luminescence Properties ◽  
White Led ◽  
Red Emission ◽  
Red Phosphors ◽  
Colour Rendering

Na2SiF6:Mn4+red phosphors were synthesizedviaa simple exothermic reduction reaction, and produced a sharp red emission spectra.

Fabrication and Luminescence Properties of CaMoO4:Eu3+ Red Phosphors for White LED

2010 ◽  
Vol 663-665 ◽  
pp. 441-444
Author(s):  
Zhen Hua Liang ◽  
Yu Zhi Feng ◽  
Xiao Xia Liu ◽  
Gui Hua Peng
Keyword(s):  
Luminescent Properties ◽  
Luminescence Properties ◽  
Precipitation Method ◽  
White Led ◽  
Doping Amount ◽  
Red Phosphors ◽  
Co Precipitation ◽  
The Relationship

CaMoO4: Eu3+ red phosphors were synthesized by co-precipitation method with H3BO3 as an additive and the relationship between H3BO3 doping amount and luminescent properties were studied. The brightness increased with increasing H3BO3 amount, the brightness of the CaMoO4: Eu3+ powder with 10 mol％ H3BO3 was 3.2 times higher than that of the phosphor without H3BO3.

Luminescence Properties of Er3+/Tm3+-Doped Ga2O3-Bi2O3-PbO-GeO2 System Glasses

2011 ◽  
Vol 399-401 ◽  
pp. 982-986
Author(s):  
Jin Liu ◽  
Dong Mei Shi ◽  
Ying Gang Zhao ◽  
Xiao Feng Wang
Keyword(s):  
Emission Intensity ◽  
Near Infrared ◽  
Emission Spectra ◽  
Upconversion Emission ◽  
Infrared Emission ◽  
Optical Devices ◽  
Luminescence Properties ◽  
Red Emission ◽  
Fiber Optical ◽  
Near Infrared Emission

The visible and near infrared emission spectra of Er3+/Tm3+-doped Ga2O3-Bi2O3-PbO-GeO2(GBPG) glasses excited at 808 nm are experimentally investigated. The results reveal that 1.53 µm emission were enhanced with an increase of Er3+concentration. Furthermore, the incorporation of Er3+into Tm3+-doped systems has also resulted in intense 522, 545 and 693nm upconversion emission intensity and an weak 660 nm red emission. The possible mechanism and related discussions on this phenomenon have been presented. The results show that Er3+/Tm3+-codoped GBPG glass may be a promising materials for developing laser and fiber optical devices.

Synthesis and photoluminescence properties of MZr2(PO4)3:Eu3+; Bi3+ (M=Na; K) phosphors

Open Physics ◽  
2012 ◽  
Vol 10 (2) ◽  
Author(s):  
Xipu He ◽  
Junli Huang ◽  
Liya Zhou ◽  
Qi Pang ◽  
Fuzhong Gong
Keyword(s):  
Luminescence Intensity ◽  
Emission Spectra ◽  
Concentration Quenching ◽  
Excitation Band ◽  
Photoluminescence Spectra ◽  
Photoluminescence Properties ◽  
Red Emission ◽  
Reaction Method ◽  
Red Phosphors ◽  
Pl Intensity

AbstractA series of new red phosphors, MZr2(PO4)3:Eu3+; Bi3+ (M=Na; K), were synthesized using the solidstate reaction method, and their photoluminescence spectra were measured. The MZr2(PO4)3:Eu3+; Bi3+ (M=Na; K) phosphors were efficiently excited by an ultraviolet (UV; 395 nm) source, and showed intense orange-red emission at 595 nm. Further investigation of the concentration-dependent emission spectra indicated that the MZr2(PO4)3:Eu3+; Bi3+ (M=Na; K) phosphors exhibit the strongest luminescence intensity when y = 0.01 in NaZr2(0:95−y)(PO4)3:Eu0.103+, Bi2y 3+ and y = 0.09 in NaZr2(0.95−y)(PO4)3:Eu0.103+, Bi2y 3+, whereas the relative PL intensity decreases with increasing Bi3+ concentration due to concentration quenching. The addition of Bi3+ widens the excitation band of NaZr2(0.95−y)(PO4)3:Eu0.103+, Bi2y 3+ around 320 nm, which provides the useful idea of broadening the excitation band around 300–350 nm to fit the ultraviolet chip.

Photoluminescence properties of Li2+xNb3xTi1−4xO3:Eu3+

2019 ◽  
Vol 12 (04) ◽  
pp. 1950057 ◽  
Author(s):  
Chao-Chao Guo ◽  
Qun Zeng ◽  
Chun-Feng Yao ◽  
Yan-Zhao Feng ◽  
Xi Chen ◽  
...  
Keyword(s):  
Solid State ◽  
Emission Spectra ◽  
Solid State Reaction Method ◽  
Photoluminescence Properties ◽  
X Ray Diffraction ◽  
Red Emission ◽  
Reaction Method ◽  
X Ray ◽  
Red Phosphors ◽  
Chromaticity Coordinate

Red phosphors with compositions of Li[Formula: see text]Nb[Formula: see text]Ti[Formula: see text]O3:3[Formula: see text]wt.% Eu[Formula: see text] [Formula: see text] were synthesized by solid-state reaction method. The samples were investigated by using X-ray diffraction (XRD) and photoluminescence spectroscopy, respectively. XRD results showed that all samples were main phase of Li2TiO3. Emission spectra of Li[Formula: see text]Nb[Formula: see text]Ti[Formula: see text]O3:3[Formula: see text]wt.% Eu[Formula: see text] powders showed strong red emission at 612[Formula: see text]nm (5D0–7F[Formula: see text] with 396[Formula: see text]nm excitation. In addition, the excitation and emission intensity increased up to [Formula: see text], and then decreased with further increasing of the x values. And the chromaticity coordinate (CIE) of the component with [Formula: see text] was superior to other components.

Development of New Red Phosphor Na3YSi2O7:Eu3+ for a White LED

2009 ◽  
Vol 421-422 ◽  
pp. 360-363 ◽  
Author(s):  
Shinichiro Kousaka ◽  
Kenji Toda ◽  
Tadashi Ishigaki ◽  
Kazuyoshi Uematsu ◽  
Mineo Sato
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Emission Intensity ◽  
Uv Light ◽  
White Led ◽  
Conventional Solid State Reaction ◽  
Red Phosphor ◽  
Red Emission ◽  
Red Phosphors ◽  
Silicate Phosphor

New red phosphors Na3YSi2O7:Eu3+ was prepared by a conventional solid-state reaction. This silicate phosphor can be efficiently excited by near UV light, yielding an intense red emission. Under the excitation of near UV light, the emission intensity is higher than that of a commercial red phosphor Y2O2S:Eu3+.

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.

Large micro-sized K2TiF6:Mn4+red phosphors synthesised by a simple reduction reaction for high colour-rendering white light-emitting diodes

RSC Advances ◽  
2015 ◽  
Vol 5 (121) ◽  
pp. 100054-100059 ◽  
Author(s):  
Tao Han ◽  
Tianchun Lang ◽  
Jun Wang ◽  
Mingjing Tu ◽  
Lingling Peng
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Reduction Reaction ◽  
Light Emitting ◽  
Red Phosphors ◽  
White Light Emitting Diodes ◽  
Colour Rendering ◽  
Simple Reduction

Large micro-sized K2TiF6:Mn4+red phosphors synthesised by a simple reduction reaction for high colour-rendering white light-emitting diodes.

scholarly journals Enhanced luminescence properties of Ca1+xSr2−xAl2O6:Eu3+ (0 ≤ x ≤ 1) red phosphors based on composition modulation

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12981-12989
Author(s):  
Biao Shen ◽  
Jianghang Xu ◽  
Qinan Mao ◽  
Jiasong Zhong
Keyword(s):  
Optical Properties ◽  
Quantum Efficiency ◽  
Luminescence Properties ◽  
Composition Modulation ◽  
Red Phosphors ◽  
Potential Applications ◽  
Enhanced Luminescence

A series of Ca1+xSr2−xAl2O6:Eu3+ (0 ≤ x ≤ 1) red-emitting phosphors with adjustable optical properties and excellent quantum efficiency was developed for potential applications in warm WLEDs.

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