Luminescent Properties of BaMgAl10O17： Eu2＋ Phosphors Coated with Y2SiO5

BaMgAl10O17： Eu^2＋ phosphors was prepared by the solid-reaction method. Y2SiO5 was coated uniformly on the surface of phosphor by the surface-coated method, and the luminescent and deterioration properties were discussed. The XRD and SEM results show that Y2SiO5 film is produced on the surface of BAM phosphor. The emission spectrum analysis shows that the peak of the phosphor does not change after coating. The two phosphors were applied to lamps and the deterioration was tested at different ignited time. The keep ratio of luminous flux of the phosphor coated with Y2SiO5 is higher than that of the uncoated phosphor.     

Synthesis and Luminescence Properties of Gd_2O_3∶Eu~(3+) Phosphors

Gd2 O3∶Eu3+ isanefficientredemittinglumines centmaterial ,whichcanbeappliedindisplays[1,2 ] .TheconventionalcommercialGd2 O3∶Eu3+ ismainlysynthesizedbyhightemperaturesolid statereactionandchemicalco precipitationmethods .Anadvancedperformanceofdisplaysrequireshighqualityphospho rssuchashighbrightnessandefficiency ,monodisper sityandfinegrainsize .Muchresearchhasanticipatedthatsubmicrometer sizedandnanometerluminescentmaterialswillhavethesepotentialadvantages[3～ 8] ,sosubmicrometer sizedan…     

Influence of Rare Earth Elements on Luminescent Properties of Y_2SiO_5∶Tb

Various types of multicomponent oxide phosphorshave been widely studied for the applications in dis-play techniques , such as high definition television(HDTV) ,projection television (PTV) and flat paneldisplays (FPD) .Since the beginning of the 1990s ,anewtype of flat panel display device ,field emissiondisplay (FED) has been developed .In this device ,the phosphors are excited bythe cathode rays withlowvoltage ( <5 kV) and high current density . Due tothese excitation conditions ,the ge…     

Synthesis of Phosphors(Ce_(0.67)Tb_(0.33))MgAl_(11)O_(19) and BaMgAl_(10)O_(17)∶Eu~(2 ) by Microwave Irradiation Technique and Their Luminescent Properties

Ｔｈｅｐｈｏｓｐｈｏｒｓ（Ｃｅ０．６７Ｔｂ０．３３）ＭｇＡｌ１１Ｏ１９（ＰＧ）ａｎｄＢａＭｇＡｌ１０Ｏ１７∶Ｅｕ２＋（ＰＢ）ａｒｅｗｉｄｅｌｙｕｓｅｄａｓｇｒｅｅｎａｎｄｂｌｕｅｌｕｍｉｎｅｓｃｅｎｔｍａｔｅｒｉａｌｓｉｎｒａｒｅｅａｒｔｈｓｔｒ...     

Synthesis and Photoluminescence of BaMgAl_(10)O_(17)∶Eu~(2 ) Phosphor by Oxalate Co-precipitation Process

Color plasma display panels (PDPs) have attract-ed considerable interest in recent years as componentsof wall-mounted television sets that are large ,flat andthin .In PDPs ,tricolor phosphors are used to convertthe vacuum ultraviolet (VUV) radiation into …     

Effects of Doping Trace Sm~(3+) and Gd~(3+) on Luminescent Character of Y_2O_2S∶Eu~(3+)

Effects of Doping Trace Sm~(3+) and Gd~(3+) on Luminescent Character of Y_2O_2S∶Eu~(3+)     

Eu~(2+) Luminescence in BaZnAl_(10)O_(17)∶ Eu Phosphor

Ａｎｉｍｐｏｒｔａｎｔｃｌａｓｓｏｆｆｌｕｏｒｅｓｃｅｎｔｌａｍｐａｎｄｐｌａｓｍａｄｉｓｐｌａｙｐｈｏｓｐｈｏｒｓｉｓｂａｓｅｄｏｎｃｏｍ ｐｏｕｎｄｓｏｆｔｈｅａｌｋａｌｉｅａｒｔｈ ｒａｒｅｅａｒｔｈａｌｕｍｉｎａｔｅｓｙｓｔｅｍｓｂｅｃａｕｓｅｏｆｔｈｅｉｒｈｉｇｈｌｕｍｉｎｅｓｃｅｎｔｅｆｆｉ ｃｉｅｎｃｙａｎｄｓｔａｂｉｌｉｔｙｕｎｄｅｒｕｌｔｒａｖｉｏｌｅｔａｎｄｖａｃｕ ｕｍｕｌｔｒａｖｉｏｌｅｔｌｉｇｈｔｅｘｃｉｔａｔｉｏｎ[1] .Ｅｓｐｅｃｉａｌｌｙ ,ａｌｋａｌｉｎｅｅａｒｔｈｈｅ…     

Comparative Study on Photoluminescent Properties of CaGdAlO_4∶Eu~(3+) Phosphors Synthesized with Three Methods

Several rare earth-doped oxide materials withhigh stability and luminescent properties were used inthe applications of various types of display panels.CaGdAlO4(CGA)has a tetragonal K2NiF4structureand belongs to a family of compounds withthe generalformula ABCO4,where Ais an alkaline earth cation,Bis Y,Sc or a trivalent rare earth element and CisAl,Ga or a transition metal ion.The crystal structureconsists of interleaved layers with a perovskite androck-salt structure.In the unit cell,t…     

Luminescent Properties of Y_2O_3∶Eu Nanocrystalls Synthesized by EDTA Complexing Sol-Gel Process

Ｎａｎｏｐａｒｔｉｃｌｅｓａｎｄｎａｎｏｃｌｕｓｔｅｒｍａｔｅｒｉａｌｓａｒｅａｎｅｗｃｌａｓｓｏｆａｄｖａｎｃｅｄｍａｔｅｒｉａｌｓｅｘｈｉｂｉｔ ｉｎｇｕｎｉｑｕｅｃｈｅｍｉｃａｌａｎｄｐｈｙｓｉｃａｌｐｒｏｐｅｒｔｉｅｓｃｏｍｐａｒｅｄｔｏｔｈｏｓｅｏｆｔｈｅｉｒｂｕｌｋｍａｔｅｒｉａｌｓ[1 ] .Ｙ2 Ｏ3 :Ｅｕｉｓａｎｅｆｆｉｃｉｅｎｔｒｅｄ ｅｍｉｓｓｉｏｎｐｈｏｓｐｈｏｒｗｈｉｃｈｈａｓｂｅｅｎｕｓｅｄｉｎｆｌｕｏｒｅｓｃｅｎｔｌｉｇｈｔｓ (ＦＬ)ａｎｄｃａｔｈｏｄｅｒａｙｔｕｂｅ (ＣＲＴｓ…     

Site Selective Spectra of Eu~(3 )-Doped Y_2SiO_5 Crystal

Site Selective Spectra of Eu~(3 )-Doped Y_2SiO_5 Crystal     

Synthesis of CaO-SiO_2-B_2O_3∶Sm_2O_3 Glasses and Luminescent Properties of Sm~(3 )

Synthesis of CaO-SiO_2-B_2O_3∶Sm_2O_3 Glasses and Luminescent Properties of Sm~(3 )     

Vibrational Spectrum and Luminescence Properties of CaAl_2B_2O_7∶Eu~(3 )

Ｉｎｒｅｃｅｎｔｙｅａｒｓｃｏｍｐｏｕｎｄｓｗｉｔｈｍｉｘｅｄｏｘｉｄｅａｎｉｏｎｓｈａｖｅｂｅｎｓｔｕｄｉｅｄｅｘｔｅｎｓｉｖｅｌｙ［１～６］．Ｉｎａｄｄｉｔｉｏｎｔｏａｆｕｎｄａｍｅｎｔａｌｉｎｔｅｒｅｓｔ,ｔｈｅｐｏｓｉｂｌｅｕｓｅｏｆｔｈｅ...     

Synthesis of Y_2O_2S：Eu~（3＋） Phosphor by Microwave Thermal Effectand Its Luminescent Properties

ＳｙｎｔｈｅｓｉｓｏｆＹ_２Ｏ_２Ｓ：Ｅｕ~（３＋）ＰｈｏｓｐｈｏｒｂｙＭｉｃｒｏｗａｖｅＴｈｅｒｍａｌＥｆｆｅｃｔａｎｄＩｔｓＬｕｍｉｎｅｓｃｅｎｔＰｒｏｐｅｒｔｉｅｓＬｉＹｕａｎｙｉｎｇ（李沅英）；ＣａｉＳｈａｏｈｕａ（蔡少华）；ＤａｉＤｅｃｈａｎ?..     

Luminescence Properties of Green-Emitting Phosphor (Ba_(1-x),Sr_x_2SiO_4∶Eu~(2+) for White LEDS

Whitelightemittingdiode(LED)iswell known assolid statedevicesthatconsistsofablueornear UVLEDchipandblue yelloworblue green red phosphors[1].AwhiteLEDthatcombinesablueLED andaYAGphosphorwasmadeavailableonthemar ketin1996[2].However,furtherstudyindicatedthat whiteLEDbypre coatingblue green redphosphors ontoalongUVLEDchipismuchmoreopticallysta blethantheconventional“blueyellow”whiteLED.Becauseitispossibletoimprovetheluminousefficacy ofwhiteLEDSexcitedbynear UVLEDSinthenear UVtob…     

Colour Centres and Energy Transfer in BaF_(2-x)Cl_x∶Eu~(2+) Phosphors

Electron trapping materials(ETMs)have shownpromise in optical storage.The doubly or multi rare-earth doped alkaline-earth sulfides are a class of sti m-ulatable phosphors,which are expected to be used inthe field of optical Parallel Boolean operation,erasable and re-writable optical memory[1~3].In addition,BaFX∶Eu2+(X=Cl,Br)phosphor,which exhibits photo-sti mulated luminescence(PSL)and offers an alternative to conventional X-rayi magingtechnology to increase the i mage definition anddec…     

Synthesis of Long Afterglow Phosphors MAl_2O_4∶Eu~(2 ), Dy~ (3 )(M=Ca, Sr, Ba) by Microemulsion Method and Their Luminescent Properties

LongafterglowphosphorsMAl2O4∶Eu2 ,Dy3 (M=Ca,Sr,Ba)haveattractedmuchinterestsfrom1990sowingtotheirexcellentpropertiessuchaslight andheatendurance,chemicalstability,highlumines centintensity,longafterglowtime,containingno poi sonouselementandsoon[1～6].Tra…     

SiO_2∶Eu~(3+)的制备与发光性能研究

以三氧化二铕和正硅酸乙酯为原材料,利用溶胶-凝胶法、高温机械力化学法合成了SiO_2∶Eu~(3+)粉体.用X射线衍射(XRD)、扫描电镜(SEM)表征了材料的结构和形貌,采用激发光谱、发射光谱对荧光粉体的发光性能进行了测量.结果说明:溶胶-凝胶法、高温机械力化学法合成样品的发光性能随着热处理温度的增加先增强后减弱,分别在900℃和600℃达到最好,粉体平均粒度分别为2μm与1μm.与溶胶-凝胶法比较,高温机械力化学法的制备温度降低了300℃.且利用高温机械力化学法制备的样品的发光性能要好于溶胶-凝胶法制备的样品.     

Structure and Luminescence Properties of Eu~(3+) Doped SiO_2 Glass Synthesized by Sol-Gel Process

Ａｍｏｎｇｌａｎｔｈａｎｉｄｅｉｏｎｓ ,Ｅｕ3 + ｉｏｎｐｏｓｓ ｅｓｅｓｇｏｏｄｌｕｍｉｎｅｓｃｅｎｔｃｈａｒａｃｔｅｒｉｓｔｉｃｓ ,ｈｉｇｈｃｏｌｏｒｐｕｒｉｔｙａｎｄｈｉｇｈｑｕａｎｔｕｍｅｆｆｉｃｉｅｎｃｙ .Ｅｕ3 + ｉｓｏｎｅｏｆｔｈｅｃｅｎｔｒａｌｉｏｎｓｆｉｒｓｔｓｅｌｅｃｔｅｄｆｏｒｔｈｅｐｒｅｐａｒａｔｉｏｎｏｆｒａｒｅｅａｒｔｈｉｏｎｓｄｏｐｅｄｌｕｍｉ ｎｅｓｃｅｎｔｍａｔｅｒｉａｌｓ .Ｄａｆｉｎｏｖａｅｔａｌ .[1] ｐｒｏｄｕｃｅｄＥｕ3 + ａｎｄＳＯ2 -4 ｄｏｐｅｄｔｕｎｇｓｔａ…     

纳米晶Y_2O_3∶Eu~(3 )氧化物颗粒均匀性的研究

利用草酸沉淀工艺制备了纳米晶 Y2 O3∶ Eu3 氧化物 ,并研究了溶液浓度、反应温度、沉淀方式等因素对制备纳米晶 Y2 O3∶ Eu3 氧化物粒度的影响 ,最后利用表面活性剂的空间位阻效应来控制粉末的团聚尺寸和粒径分布     

Sr_2Al_2SiO_7∶Eu~(2+)发光材料制备及性能研究

采用溶胶凝胶-燃烧还原法在1100℃,p H 3~4的条件下制取了Eu~(2+)掺杂铝硅酸锶发光材料,通过TG-DTA、XRD和荧光光谱分析等方法,研究了材料的结构和发光性能,并对Eu~(2+)不同掺杂浓度下的发光性能进行了对比研究。结果表明,样品干凝胶的分解可以分为熔化、有机物的分解及Sr_2Al_2SiO_7∶Eu~(2+)晶相的生成三个阶段,1100℃所有反应完全;Sr_2Al_2SiO_7∶Eu~(2+)发光材料属于正方晶系晶体结构,其激发光谱是位于峰值344 nm~350nm的宽带谱,发射光谱峰值位于455 nm,最大发射光谱强度为7500 mcd;Eu2+掺杂浓度对其发光性能影响较大,在实验条件下掺杂摩尔浓度为0.04时激发光谱和发射光谱强度均达到最大。