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Yuansheng Wang - One of the best experts on this subject based on the ideXlab platform.
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non rare earth k2xf7 mn4 x ta nb a highly efficient narrow band Red Phosphor enabling the application in wide color gamut lcd
Laser & Photonics Reviews, 2017Co-Authors: Hang Lin, Qingming Huang, Yao Cheng, Bo Wang, Jiaomei Wang, Yuansheng WangAbstract:The advent of wide color-gamut LED backlight technology greatly improves the user experience in visions. The bottleneck restricting progress of this technology is to develop Red Phosphor with satisfactory spectral features and low cost. Herein, a novel non-rare-earth K2XF7:Mn4+ (X = Ta, Nb) was successfully designed and synthesized, exhibiting an admirable quantum efficiency of ∼93.5%, an extremely narrow FWHM of ∼2.3 nm, and a high color purity of ∼99.6%. Unlike the previously reported Mn4+ activated fluorides, Mn4+ in K2XF7 suffers highly distorted octahedral environment in C1 (or C2v) group symmetry, enabling the appearance of intense zero phonon line and distinctive vibronic transitions. Systematical high-resolution spectroscopic analyses down to 10 K disclose the influences of strong crystal field, weak nephelauxetic effect, and intermediate electron-phonon coupling are responsible for the peculiar spectral features of Mn4+ in K2XF7. Impressively, a wide color-gamut reaching up to 86.7% NTSC is realized, demonstrating great validity of K2XF7:Mn4+ for LCD backlights. The present study not only brings a brand-new kind of Mn4+ activated host to the sight of Phosphor community (the host can be extended to surges of tantalum/niobium fluorides), but also may enlighten researchers to design highly distorted environment to achieve unique spectral properties of Mn4+.
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non rare earth bamgal10 2xo17 xmn4 xmg2 a narrow band Red Phosphor for use as a high power warm w led
Chemistry of Materials, 2016Co-Authors: Bo Wang, Feng Huang, Hui Chen, Ju Xu, Yuansheng WangAbstract:Owing to its low cost and admirable luminescent characteristics for use in warm white-light-emitting diode (w-LED) applications, the non-rare-earth Mn4+-activated Red Phosphor has emerged as a potent competitor of commercial Eu2+-doped nitrides in recent years. In this work, the novel Red-emitting Phosphor BaMgAl10–2xO17:xMn4+,xMg2+ is successfully synthesized, which exhibits bright and narrow-band luminescence peaking at 660 nm with a full width at half-maximum of merely ∼30 nm upon blue light excitation. The unique structural feature of BMA, i.e., alternating arrangements of Mn4+-doped MgAl10O16/undoped BaO layers in the z direction and Mn4+-doped [AlO6]/undoped [AlO4] groups in the x–y plane, favors efficient Mn4+ luminescence by Reducing nonradiative energy loss channels. Unlike previously reported hosts, BMA accommodates Mg2+ in the lattice without destabilizing the crystal structure. Remarkably, partitioning Mg2+ in the host not only greatly enhances Mn4+ luminescence by 1.84-fold but also retards t...
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a novel double perovskite gd2zntio6 mn4 Red Phosphor for uv based w leds structure and luminescence properties
Journal of Materials Chemistry C, 2016Co-Authors: Hang Lin, Qingming Huang, Bo Wang, Zebin Lin, Feng Huang, Hui Chen, Jiangcong Zhou, Yuansheng WangAbstract:Red-emitting Mn4+ activated oxide Phosphors with a cheap price and excellent physical/chemical stability have become a hot research topic for their potential applications in white LEDs (w-LEDs). Herein, we report a novel double-perovskite Gd2ZnTiO6:Mn4+ (GZT:Mn4+) Red Phosphor. The material microstructures were characterized with the aid of XRD Rietveld refinement and HRTEM observations. The luminescence properties and dynamics of Mn4+ in GZT were studied in detail using low/room temperature steady/transient spectroscopic techniques. The crystal field strength and nephelauxetic effect influencing the Mn4+ emission energy were also analyzed. It is revealed that the special crystal structure of GZT featuring alternately slant-wise arranged [TiO6]/[ZnO6] octahedrons with the [–Mn4+–O2−–Zn2+–] bond angle deviating from 180° is beneficial to achieving efficient Mn4+: 2Eg → 4A2 transition in the deep-Red region. After mixing the Red-emitting GZT:Mn4+ with the commercial blue and green Phosphors in various ratios, and then coupling the mixture with a 365 nm UV chip to build a w-LED, the white light was found to evolve from cool to warm with a tunable correlated color temperature (CCT) from 6977 K to 4742 K, a color rendering index (CRI) up to 82.9, and an improved R9 value to 43, which validates that GZT:Mn4+ is a promising Red color converter for UV-based w-LEDs.
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highly thermal stable warm w led based on ce yag pig stacked with a Red Phosphor layer
Journal of Alloys and Compounds, 2015Co-Authors: Zebin Lin, Hang Lin, Bo Wang, Feng Huang, Hui Chen, Yuansheng WangAbstract:Abstract We realize a facile chromaticity tuning for the Y 3 Al 5 O 12 :Ce 3+ Phosphor-in-glass (PiG) based w-LED, with the aid of a CaAlSiN 3 :Eu 2+ Red Phosphor layer in a remote-type stacking configuration. It was experimentally demonstrated that both the stacking order and the relative amount of Red Phosphor influence the electroluminescent performance of the constructed w-LED significantly, and the optimized warm w-LED exhibits admirable performance with a luminous efficacy of 93.9 lm/W, a correlated color temperature of 3346 K, a color rendering index of 77.3, and a color shift deviating from Planckian locus in D uv of 0.0034. Significantly, the Red Phosphor layer stacked PiG based warm w-LED presents an excellent heat resistance, endowing the device with long life-time, which may serve as a promising robust high-power indoor lighting source.
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camg2al16o27 mn4 based Red Phosphor a potential color converter for high poweRed warm w led
ACS Applied Materials & Interfaces, 2014Co-Authors: Bo Wang, Hang Lin, Hui Chen, Yuansheng WangAbstract:New non-rare-earth-based oxide Red Phosphor discovery is of great interest in the field of energy-efficient LED lighting. In this work, a novel blue-light activated CaMg2Al16O27:Mn4+ (CMA:Mn4+) Phosphor, showing strong Red emission peaked at ∼655 nm under 468 nm excitation, is prepaRed by a solid-state reaction route. The microstructure and luminescent performance of this Red-emitting Phosphor are investigated in detail with the aids of X-ray diffraction refinement, diffuse reflection spectra, steady-state photoluminescence spectra and temperature-dependent PL/decay measurements. The crystal field strength (Dq) and the Racah parameters (B and C) are carefully calculated to evaluate the nephelauxetic effect of Mn4+ suffering from the CMA host. After incorporating CMA:Mn4+ and YAG:Ce3+ Phosphor microcrystals into the glass host via a “Phosphor-in-glass (PiG)” approach, warm white-light is achieved in the assembled high-poweRed w-LED device, thanks to the improved correlated color temperature and color rende...
R S Liu - One of the best experts on this subject based on the ideXlab platform.
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ca 1 x li x al 1 x si 1 x n 3 eu 2 solid solutions as broadband color tunable and thermally robust Red Phosphors for superior color rendition white light emitting diodes
Light-Science & Applications, 2016Co-Authors: Le Wang, Takashi Takeda, Rong-jun Xie, Xiaojun Wang, Dong Luo, Yiting Tsai, R S Liu, Naoto HirosakiAbstract:Color rendition, luminous efficacy and reliability are three key technical parameters for white light-emitting diodes (wLEDs) that are dominantly determined by down-conversion Phosphors. However, there is usually an inevitable trade-off between color rendition and luminescence efficacy because the spectrum of Red Phosphor (that is, spectral broadness and position) cannot satisfy them simultaneously. In this work, we report a very promising Red Phosphor that can minimize the aforementioned trade-off via structure and band-gap engineering, achieved by introducing isostructural LiSi2N3 into CaAlSiN3:Eu2+. The solid solution Phosphors show both substantial spectra broadening (88→117 nm) and blueshift (652→642 nm), along with a significant improvement in thermal quenching (only a 6% Reduction at 150 °C), which are strongly associated with electronic and crystal structure evolutions. The broadband and robust Red Phosphor thus enables fabrication of super-high color rendering wLEDs (Ra=95 and R9=96) concurrently with the maintenance of a high-luminous efficacy (101 lm W−1), validating its superiority in high-performance solid state lightings over currently used Red Phosphors. A new Red Phosphor with broadband emission has yielded white LEDs that have both a high luminous efficacy and excellent colour rendering. By applying structure and bandgap engineering strategies, Rong-Jun Xie and co-workers from China, Japan and the USA fabricated their rare-earth Phosphor from Ca1−xLixAl1−xSi1+xN3:Eu2+. They say that the introduction of LiS2N3 to CaAlSiN3:Eu2+ minimizes the usual trade-off between emission colour and efficiency. When the Red Phosphor was combined with a commercial blue InGaN LED and a green Phosphor, the result was a white LED with a luminous efficacy exceeding 100 lumens per watt and a high colour rendering. The researchers note that in addition to superior colour quality, the use of LiS2N3 imparts better thermal stability to the Phosphor compaRed with currently used Red Phosphors.
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a low temperature co precipitation approach to synthesize fluoride Phosphors k2mf6 mn4 m ge si for white led applications
Journal of Materials Chemistry C, 2015Co-Authors: Ling Ling Wei, R S Liu, Mu-huai Fang, Chun Che Lin, M G Brik, Huan JiaoAbstract:A new class of Mn4+ activated alkali-metal hexafluoride Red Phosphors are emerging for white light-emitting diodes because of their sharp Red line 2Eg → 4A2g emissions (600–650 nm) excited by irradiation of 4A2g → 4T1g (320–380 nm) and 4A2g → 4T2g (380–500 nm) transitions. However, these Phosphors have the drawbacks of difficult control of the Mn valence state during synthesis and lack of underlying mechanisms for structure–photoluminescence relationships. In this study, we explore a novel, highly productive route to the quantifiable synthesis of K2GeF6:Mn4+ by the chemical co-precipitation method at room temperature. The prepaRed yellowish K2GeF6:Mn4+ powders exhibit a hexagonal shape and high crystallinity without significant defects. The photoluminescence thermal stability and white light-emitting diodes applicability of K2GeF6:Mn4+ suggest that it is a promising commercial Red Phosphor because of its efficient emission intensity, high color purity and excellent thermal stability. Structural analyses and theoretical calculations reveal that the Red shift of the K2GeF6:Mn4+ Red Phosphor compaRed with K2SiF6:Mn4+ is due to the longer Ge–F distance and lower effective Mulliken charge of F ions in coordination environments of the MnF62− octahedron. The split feature in K2GeF6:Mn4+ is due to the hexagonal distortion in the host. The structure–photoluminescence mechanism is pRedicted to be general in hexafluoride Red Phosphors to tune the optical properties through cationic substitutions and crystal structure adjustments.
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combinatorial chemistry approach to searching Phosphors for white light emitting diodes in gd y bi eu vo4 quaternary system
Journal of Materials Chemistry, 2011Co-Authors: Kuo Ju Chen, Lei Chen, R S LiuAbstract:A Red Phosphor is desiRed to improve the color rendering index (Ra) of white light-emitting diodes (LEDs). Instead of developing a novel Red Phosphor individually, this work exploits a special yellow Phosphor that contains Red and green components to be matched with blue Phosphor to produce white light. The desiRed emission color of yellow Phosphor is tuned up by tailoring the green emission of Bi3+ and the Red emission of Eu3+, and the luminescence efficiency and the thermal stability of luminescence are maximized by optimizing the composition of the host in the GdVO4-YVO4 system. A dynamic and virtual variation of samples emission color and intensity with Bi3+, Eu3+, Y3+ and Gd3+ concentrations and excitation wavelengths is clearly displayed in the luminescence images of the combinatorial libraries. The production of white light with high color rendering is demonstrated by preparing a practical white LED with a Ra of up to 90 from commercially available blue Phosphor and optimized yellow Phosphor.
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znb2o4 bi3 eu3 a highly efficient Red emitting Phosphor
Optics Express, 2010Co-Authors: Weiren Liu, Chun Che Lin, Yichen Chiu, Yaotsung Yeh, Shyue Ming Jang, R S LiuAbstract:The novel Red Phosphor of Eu3+-Bi3+ co-activated ZnB2O4 was prepaRed by a solid-state reaction. The composition-optimized (Zn0.9Eu0.1)B2O4 Phosphor exhibits a dominant emission peak at 610 nm (5D0–7F2) with CIE coordinates of (0.63, 0.36) under the excitation at 393 nm. By co-doping Bi3+ ions in ZnB2O4:Eu3+, the emission intensity and quantum efficiency can be efficiently enhanced by an increment of 14% and 6%, respectively. The luminescence performance and thermal stability of (Zn0.8Bi0.1Eu0.1)B2O4 Phosphor were found to be superior to that of the commodity Phosphor, La2O2S:Eu3+. The Red-emitting borate Phosphor may be potentially useful in the fabrication of white light-emitting diodes (LEDs).
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highly stable three band white light from an ingan based blue light emitting diode chip precoated with oxy nitride green Red Phosphors
Applied Physics Letters, 2007Co-Authors: Chih Chieh Yang, Chihmin Lin, Yi Jung Chen, Shih Ren Chuang, R S LiuAbstract:A three-band white light-emitting diode (LED) was fabricated using an InGaN-based blue LED chip that emits 455nm blue light, and green Phosphor SrSi2O2N2:Eu and Red Phosphor CaSiN2:Ce that emit 538nm green and 642nm Red emissions, respectively, when excited by the 455nm blue light. The luminous efficacy of this white LED is about 30lm∕W at a dc of 20mA. With increasing dc from 5.0to60mA, both the coordinates x and y of the white LED tend to be the same, and consequently the Tc is the same and the Ra increases to 92.2.
Menglian Gong - One of the best experts on this subject based on the ideXlab platform.
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high brightness and thermal stable sr3la po4 3 eu3 Red Phosphor for nuv light emitting diodes
Journal of Alloys and Compounds, 2014Co-Authors: Liya Zhou, Xinguo Zhang, Chunyan Zhou, Jiahui Song, Menglian GongAbstract:Abstract High-brightness Red Phosphor, Sr 3 La(PO 4 ) 3 : Eu 3+ was prepaRed by the solid-state reaction for the first time. Its photo-luminescent property was investigated and the optimum concentration of Eu 3+ doped in the Sr 3 La(PO 4 ) 3 is 80 mol%. High quenching concentration in this Phosphor is due to weak energy transfer effect between Eu 3+ ions. Sr 3 La(PO 4 ) 3 : Eu 3+ exhibited good thermal stability and its emission intensity decreased slightly at temperature above 150 °C. The fabricated phototype LEDs with Sr 3 La(PO 4 ) 3 : 0.80Eu 3 and 395 nm-emitting InGaN chips exhibit bright Red emission, indicating that this Phosphor is a promising candidate as a Red component for NUV LEDs application.
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high brightness eu3 doped ca3 po4 2 Red Phosphor for nuv light emitting diodes application
Optical Materials, 2013Co-Authors: Liya Zhou, Xinguo Zhang, Menglian GongAbstract:Abstract High-brightness Red Phosphor, Ca3(PO4)2:Eu3+ was prepaRed by the solid-state reaction. Its photo-luminescent property was investigated and the optimum concentration of Eu3+-doped in the Ca3(PO4)2 is 4 mol%. Its concentration quenching process is also studied. The single Red light-emitting diode was obtained by combining InGaN chip with the Red Phosphor. The results show that this Phosphor is a promising candidate as a Red component for fabrication of NUV LEDs.
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low thermal quenching and high efficiency ce3 tb3 co doped ca3sc2si3o12 green Phosphor for white light emitting diodes
Journal of Luminescence, 2011Co-Authors: Yibo Chen, Kok Wai Cheah, Menglian GongAbstract:Abstract Low thermal quenching and high-efficiency Ca3Sc2Si3O12:Ce3+ (CSSO:Ce3+) Phosphors with co-doping Tb3+ ion were prepaRed by a solid state method and the properties of these Phosphors were investigated. The results showed that co-doping of Tb3+ not only enhances the photoluminescence remarkably and decreases the thermal quenching of the Phosphor, but also heightens the performances of the LEDs fabricated with the Phosphor. A high-efficiency and low color temperature white LED was fabricated with the prepaRed CSSO:1%Ce3+, 0.5%Tb3+ and a Red Phosphor, indicating that CSSO:1%Ce3+,0.5%Tb3+ Phosphor is a suitable green Phosphor for the fabrication of high-efficiency white LEDs.
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the potential Red emitting gd2 yeuy wo4 3 x moo4 x Phosphors for uv ingan based light emitting diode
Materials Science and Engineering B-advanced Functional Solid-state Materials, 2007Co-Authors: Xiaoxiao Wang, Yulun Xian, Jianxin Shi, Menglian GongAbstract:Abstract A series of Eu 3+ -doped solid solution of tungstate and molybdate were prepaRed by solid-state reaction technique and their photoluminescence property were investigated for searching a new Red Phosphor for UV InGaN-based light-emitting diode (LED). The Phosphors show intensely Red emission with good color purity. Among these Phosphors, GdEu(MoO 4 ) 0.5 (WO 4 ) 2.5 exhibits the strongest Red emission under 395 nm light excitation and appropriate CIE chromaticity coordinates ( x = 0.67, y = 0.33) same with the NTSC standard values, and with which a Red UV InGaN-based LED was fabricated based on the standard LED technology at I F = 20 mA. The emission spectrum of the Red LED indicates that this Red Phosphor is a potential candidate for the near UV InGaN based LEDs.
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novel Red Phosphor of bi3 sm3 co activated naeu moo4 2
Optical Materials, 2007Co-Authors: Zhengliang Wang, Hongbin Liang, Menglian GongAbstract:Abstract A novel Phosphor, NaEu(MoO 4 ) 2 , co-doped with Bi 3+ ions and Sm 3+ ions was prepaRed by solid-state reaction technique, and its photoluminescent properties were investigated. The introducing of Bi 3+ ions and Sm 3+ ions broadened the excitation band of the Phosphor NaEu(MoO 4 ) 2 and enhanced the emission intensity of Eu 3+ under 395/405 nm light excitation. The emission of the Phosphor shows very good CIE (Commission Internationale de l’Eclairage, International Commission on Illumination) chromaticity coordinates ( x = 0.66, y = 0.34). The Phosphor may be applied in fabrication of Phosphor-converted light-emitting diodes (LEDs).
Qinyuan Zhang - One of the best experts on this subject based on the ideXlab platform.
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luminescence properties and warm white led application of a ternary alkaline fluoride Red Phosphor k2naalf6 mn4
Dalton Transactions, 2017Co-Authors: L Y Wang, E H Song, Tingting Deng, Yingling Zhou, Z F Liao, Weiren Zhao, B Zhou, Qinyuan ZhangAbstract:Herein, a Mn4+ ion doped complex ternary-alkaline fluoride Red Phosphor K2NaAlF6:Mn4+ has been synthesized through a facile two-step co-precipitation method at room temperature. The crystal structure, morphological properties and influence of the dopant concentration, temperature and humidity on luminescence properties as well as the performance of the as-synthesized Phosphor used in white light emitting diodes (WLEDs) were investigated carefully. Intense absorption in the blue region (∼460 nm) and bright narrow-band Red emission (∼630 nm) with high color purity were observed from this resultant powder. Temperature-dependent investigation and reliability examination in a HTHH environment (85 °C high temperature and 85% high humidity) indicate that the obtained ternary-alkaline fluoride Phosphor K2NaAlF6:Mn4+ presents more exceptional thermal quenching behavior and longevity compaRed to some other binary-alkaline fluorides. Moreover, using K2NaAlF6:Mn4+ as a Red light component, a warm WLED with a preferable color rendering index (Ra = 85.5) and luminous efficacy (LE = 91.2 lm W−1) as well as a low corresponding color temperature (CCT = 3650 K) is easily achieved, further revealing the great potential of the as-prepaRed ternary-alkaline fluoride Red Phosphor K2NaAlF6:Mn4+ for WLED applications.
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the design and preparation of the thermally stable mn4 ion activated narrow band Red emitting fluoride na3gaf6 mn4 for warm wled applications
Journal of Materials Chemistry C, 2017Co-Authors: Tingting Deng, L Y Wang, E H Song, Jiayi Sun, Y Deng, Jun Wang, Qinyuan ZhangAbstract:Herein, a new Red Phosphor Na3GaF6:Mn4+ has been designed and synthesized by a facile two-step co-precipitation method at room temperature. Single crystal X-ray diffraction analysis reveals that the fluoride Na3GaF6 crystallizes in the P2(1)/n space group with a = 5.4760 A, b = 5.6862 A, c = 7.9009 A, β = 90.309°, and z = 2. Upon blue or UV light excitation, the obtained Phosphor Na3GaF6:Mn4+ emits intense and pure Red fluorescence. The effects of raw materials, doping concentration and environmental temperature on its luminescence properties and crystal structure have been investigated and discussed in detail. Such a newly synthesized Red Phosphor shows excellent anti-thermal quenching behavior (∼118.8% of emission intensity at 150 °C relative to 25 °C) and good color stability upon blue light (∼467 nm) excitation. By using the Na3GaF6:Mn4+ Phosphor as a Red light component, a high-power stable warm white light-emitting diode (WLED, Ra = 81, CCT = 2966 K, luminous efficacy = 56.73 lm W−1) was fabricated, further evidencing the potential of the as-synthesized Na3GaF6:Mn4+ Phosphor for white LED applications.
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room temperature synthesis and warm white led applications of mn4 ion doped fluoroaluminate Red Phosphor na3alf6 mn4
Journal of Materials Chemistry C, 2016Co-Authors: E H Song, Mingying Peng, Jing Wang, Shi Ye, Xiaofang Jiang, Qinyuan ZhangAbstract:A novel Red fluoroaluminate Phosphor, cryolite Na3AlF6:Mn4+, has been designed and synthesized via a facile two-step method at room temperature. Under blue light excitation, it exhibits intense sharp line Red fluorescence (∼630 nm) with high color purity. The crystal structure, morphology and doping concentration of the samples were characterized in detail using X-ray diffraction (XRD), scanning electron microscopy (SEM) and ICP-AES. The influence of synthesis conditions, raw materials and doping concentration on crystal structure and photoluminescence (or decay behavior) has been investigated carefully. The optimal composition, Na3AlF6:1.58%Mn4+, shows a bright Red light and excellent thermal stability (∼99.93% of the emission intensity at 200 °C relative to 23 °C) upon ∼467 nm blue light excitation. A warm high-power white LED with a high color rendering index (Ra = 92.7 and R9 = 94) and low color temperature (CCT = 3903 K) was fabricated based on the blue InGaN chip, commercial yellow Phosphor YAG:Ce3+ and Red Phosphor Na3AlF6:Mn4+.
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orderly layeRed tetravalent manganese doped strontium aluminate sr4al14o25 mn4 an efficient Red Phosphor for warm white light emitting diodes
Journal of the American Ceramic Society, 2013Co-Authors: Mingying Peng, Peter A Tanner, Chuqi Liang, Pengfei Li, Qinyuan ZhangAbstract:Searching for an efficient non rare earth-based oxide Red Phosphor, particularly excitable by light in the wavelength from 380 to 480 nm and unexcitable by green light, is essential for the development of warm white light emitting diodes (WLEDs). Here, we report a promising and orderly-layeRed candidate: Sr4Al14O25:Mn4+ with CIE color coordinates (0.722, 0.278). It has higher luminescence efficiency particularly upon blue excitation and is much cheaper than the commercial Red Phosphor 3.5MgO·0.5MgF2·GeO2:Mn4+ (MMG:Mn4+). In sharp contrast to Eu2+-doped (oxy)nitrides, the Phosphor can be synthesized by a standard solid-state reaction at 1200°C in air. The effects of flux boron content, environment, and preparation temperature, sintering dwelling time as well as Mn concentration have been systematically investigated for establishing the optimal synthesis conditions. The low temperature emission spectra reveal that there are at least three types of Mn4+ ions in Sr4Al14O25:Mn4+ due to the substitution for the distorted octahedral Al3+ sites. The AlO6 layers where Mn4+ prefers to reside are well separated from one another by AlO4 tetrahedra in one dimension parallel to axis a. This scenario can efficiently isolate Mn4+ ions from local perturbations, thereby enabling the high efficiency of luminescence. The energy transfer rates and mechanism are discussed.
Z W Zhang - One of the best experts on this subject based on the ideXlab platform.
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wide band excited labmoo6 eu3 Red Phosphor for white light emitting diode
Journal of Alloys and Compounds, 2015Co-Authors: Z W Zhang, D Q, Y Yue, M Z, Riping LiuAbstract:Abstract A novel high-efficiency near-UV light-emitting diode (LED)-based color-conversion Phosphor, Red-emitting LaBMoO6:Eu3+, was synthesized by solid-state reaction for the first time, and its photoluminescence (PL) properties were investigated for application in white-light-emitting diodes (W-LEDs). The as-synthesized Phosphors were characterized by X-ray powder diffraction, photoluminescence excitation (PLE), and PL emission spectra. The PLE and PL emission spectra revealed that when x ⩽ 0.05, all the charge-transfer states centeRed at 350 nm, and LaBMoO6:Eu3+ Phosphor emitted bright Red light under 350 nm excitation. The CIE (Commission Internationale de l’Eclairage) chromaticity coordinates for LaBMoO6:Eu3+ Red Phosphor were simulated and located in the Red region. All the results indicate that the developed LaBMoO6:Eu3+ Phosphor could be potentially used as W-LEDs.
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wide band excited labmoo6 eu3 Red Phosphor for white light emitting diode
ChemInform, 2015Co-Authors: Z W Zhang, D Q, Y Yue, M Z, Riping LiuAbstract:The new title Phosphor is synthesized by solid state reaction of H3BO3, (NH4)6Mo7O24, La2O3, and Eu2O3 (900 °C, 4 h in air).