简介：Anewmethodofpreparationofirradiativematerialbyusingrareearthasluminophorandinorganicpowderasbasenucleuswaspresented.Rareearthwasusedtomakecolloid,whichwasmixedwithbasenucleussolution,wheredeposition/attachmentreactiontookplaceandrareearthwasadheredontothesurfaceofbasenucleus,henceyieldinganewrareearthencapsulatedirradiativematerial.Fluorescentspectrumanalysisshowsthatthismaterialpossessestwoemissionpeaks,onewithin400～500nmandtheotherwithin580～700nm,reflectingtheluminouscharacteristicsoforiginalrareearthmaterial.

简介：Akindofsulphide,CaS:Eu2+,activatedbyeuropiumionforwhiteLEDlightingwassynthesizedviasolid-statereactionrouteinreducingatmospheres.Thephosphorswerethenencapsulatedwithsiliconeresin.Moreover,chemicalstructureofthephosphorswascharacterizedbyXRD.MicrostructureofthepowderswasobservedbySEM.Spectraofexcitationandemissionforthephosphorswerealsoobtainedbyaspectrophotometer.Effectofprocessingparametersontheluminescentpropertiesofthepowderswassystematicallystudiedtoresultinthephosphorswithgoodchemicalstabilityandmaximalrelativeluminescentintensity.

简介：二高度光的铕(III)和铽(III)的准备有succinimide(SI)和N-hydroxysuccinimide(NHSI)的建筑群被报导，它进一步通过元素的化学分析，热分析，英尺红外，粉末X光检查衍射，SEM和荧光光谱学被调查。通过这些分析收集的数据揭示了Eu(III)的形成，有上面的Tb(III)建筑群对ligand在金属提及ligands(M:L)1:3的臼齿的比率。光中心从photoluminescent系列调查被保留的关于通过lanthanide的协作地点的有效促进感受性的有趣的结论。当时，强壮的光排放在Eu(III)-SI和Tb(III)-NHSI建筑群的情况下被观察-SI建筑群展出了的相应Eu(III)-NHSI和Tb(III)没有相片光性质。最新获得的光lanthanide建筑群可能具有为在光电子的各种各样的应用的特别兴趣。

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简介：单斜晶、六角形的LaPO4:5mol.%Eu3+黄磷与仅仅在一样的合成温度由一个热水的方法调整答案的pH价值被综合。被不同准备影响的Eu3+-dopedLaPO4,的微观结构，形态学和光致发光调节，被X光检查衍射(XRD)描绘，扫描电子显微镜学(SEM)，Fourier变换红外线的光谱学(英尺红外)，拉曼光谱学和光光谱学分别地。然而，标本在强壮的酸答案显示出单斜晶的结构它在弱酸答案和强壮的碱答案变成了六角形的结构。单斜晶的LaPO4:Eu3+显示出最长的长度到直径比率，它被归因于优先的生长[-112]。单斜晶的标本与六角形的标本相比在红外线的系列，拉曼乐队位置和费用转移(CT)展出了细微红移动。而且，谷物尺寸的计算结果，格子参数，在在拉曼模式和排放积分紧张的半最大值的完整的宽度在对分析结果的好同意。单斜晶的标本显示出最大的绝对的光量收益(0.4)和第二一生2(0.52ms)，它与在CIE的红橘子的排放是一致的。5D07F1在六角形的标本占据了一个dominate位置，它显示在六角形的结构的更多的Eu3+被占据对称地点的倒置中心。

简介：BondedtypeRE3+dopedluminescentco-polymerwassynthesizedbysolutionfreeradicalcopolymerization.Theinfluenceofchargesequence,monomersandco-polymerizedmethodonpropertiesandstructuresoftheco-polymerswasstudied.Theemissionintensityoftheco-polymersatdifferentRE3+concentrationswastested.Theresultsshowedthattheco-polymersofEu-PStandEu-PMMAbothhadwideabsorptionpeakat200-400nmandthestrongestpeakappearedat235nm.ThefluorescentintensityofEu3+dopedpolystyreneco-polymerwasstrongerthanthatofEu3+dopedPMMAcopolymer.Thecharacteristicemissionofeuropiumionswasobservedintheco-polymers.Thecopolymerdopedwithrareearthelementsshowedthe"sensitizationeffect"forthecentralions.Thebonded-typerareearthcopolymernotonlyenhancedtheenergytransferefficiency,butalsoimprovedthefluorescenceintensitybyiacreasmgtherigidityofmainandsidechain.

简介：Trivalentsamariumdopedbariummolybdate（BaMoO_4：Sm~（3＋））redphosphorwassuccessfullysynthesizedbyhydrothermalmethod.Thecrystalstructure,morphologyandphotoluminescentpropertywerecharacterizedbyX-raydiffraction,fieldenvironmentalscanningelectronmicroscopyandphotoluminescencespectroscopy.TheresultsindicatedthatthesynthesizedBaMoO_4：Sm~（3＋）phosphorconsistedofapurephasewithanoctahedralstructure.Themainexcitationpeakswerelocatedat362,404,445and477nm,respectively,andwereobviouslyobserved.Themainemissionpeakswerelocatedat533,566,602and646nm,respectively.Thephosphorsexhibitedaredperformanceat646nm,whichwasappropriatefortheultraviolet-lightemittingdiode（UV-LED）andblueLED.TheluminescentintensityofBaMoO_4：Sm~（3＋）increasedwithanincreaseinthedopingamountofSm~（3＋）.Theluminescentintensityhadtheoptimalvalueforx=0.03.WhenthedopingamountofSm~（3＋）wasfurtherincreased,theconcentrationquenchingphenomenonwasobserved.Monovalentlithium（Li＋）cationwasusedasachargecompensator.TheluminescenceintensityfirstincreasedwithincreasingLi＋dopingconcentration,andthendecreased.TheoptimalcontentofLi＋wasabout2%.TheBaMoO_4：Sm~（3＋）phosphorpreparedinthisstudycouldactassuperiorredphosphorforwhiteLEDs.

简介：ThesinglecrystalgrowthofstoichiometrichostluminescentcrystalNa5Eu（WO4）4hasbeeninvestigated.UsingNa2WO4asaflux,theoptimumconditionstogrowapuresinglecrystalbyflux-slow-coolingmethodhavebeendetermined.Ahighopticalqualitysinglecrystalofdimention4.5mmhasbeengrown,whichisthelargestoneasweknowsofar.Themicro-hardnessofNa5Eu（WO4）4singlecrystalis3.46×103MPa.Itsrefractiveindexis1.81inwhitelightwavelengthregionandthespecificgravityis5.65g/cm3.Thefluorescentandexcitationspectrahavebeendeterminedandthereasonofthefluorescentquenchof5D2and5D1to7FjofEu3+canbeexplainedasmulti-phononnon-radiationtransition.

简介：AnovelTb（III）ternarycomplexTb（p-BBA）_3MAAwassynthesizedwith4-benzoylbenzoicacid（p-BBA）andmethacrylicacid（MAA）asligands.ThecomplexwascharacterizedbyIR,UV-visible,thermogravimetricanalysisandfluorescencespectroscopy.Monitoredat544nm,thecomplexdisplayedwideandstrongexcitationbandat300–400nm,whichmatchedwellwiththe365nm-emittingUVchip.Thecomplexexhibitedexcellentgreenemissionat544nm（~5D_4→~7F_5transitionofTb~（3＋））underanexcitationat365nm.Besides,thecomplexshowedhighthermalstability.Itsintramolecularenergytransferprocesswasfurtherdiscussed.Furthermore,thecomplexalsohadhigherfluorescencelifetime（1.38ms）andhigherquantumyield（0.372）.Finally,electroluminescentpropertiesindicatedthatwhenusedtofabricateLEDwith365nmUVchip（powerefficiencyis18.6lm/W）,thecomplexremaineditsfavorableopticalperformance.TheseresultsimpliedthatTb（p-BBA）_3MAAcouldbeusedasagreenphosphorforNUV-basedwhiteLED.

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简介：Sr1.995–1.5xGdxSiO4:0.005Eu2+phosphorserieswithx=0–0.08molfornear-ultravioletwhitelight-emittingdiodes(NUVw-LEDs)weresynthesizedviasolid-statereactionmethod.XRDprofilepatternandrefinementresultsdemonstratedthatdopingGd3+ionsresultedinthephasetransformation(β-Sr2SiO4→α’-Sr2SiO4).Thephotoluminescencespectrumofthesamplewithx=0moldisplayedtwoemissionpeakscenteredat470and525nm.Thetwo-peakspectrabecameone-peakspectrawiththeGd3+concentrationincreasing.Actually,thefittingresultsdemonstratedthattheone-peakspectrawerestillcomposedoftwosingleemissionspectra.ThephotoluminescenceintensitywasimprovedandtheCIEchromaticitycoordinateswereadjustedviadopingGd3+.

简介：Organicsubstancesuchassolventandresin'seffectonluminescentcapabilityofSrAl2O4:Eu2+,Dy3+phosphorwasstudied.Someorganicsolventsandresinswereselectedforexperimentation.TheresultsindicatethatthoseorganicsolventswillnothavenegativeeffectontheappliedcapabilityofSrAl2O4:Eu2+,Dy3+phosphor.Adoptingtheorganicresinsandcoveringmethod,theafterglowluminanceofSrAl2O4:Eu2+,Dy3+phosphorwasincreasedby85.01%and82.51%.

简介：PolycrystallineGd2(MoO4)3:Dy3+phosphorshavebeensynthesizedbyhightemperaturesolid-statereactionmethod.ThephosphorswerecharacterizedwithX-raydiffractometer,thermogravimetricanalysisanddifferentscanningcalorimeter,scanningelectronmicroscopy,andphotoluminescencespectrofluorimeter.Severalpeaksat351,389,425,452,and472nmappearedinphotoluminescenceexcitationspectrum,whichmatchedwellwiththeemissionoftheultraviolet(UV)andblue-lightemittingdiode(LED)chips.Uponexcitationat389nmUVlight,intenseemissionscenteredat484,575and668nmwereattributedtothetransitionsof4F9/2→6H15/2,4F9/2→6H13/2and4F9/2→6H11/2ofDy3+,respectively.ThechromaticitycoordinatesandcorrelativecolortemperatureshavebeencalculatedandpresentedintheCommissionInternationaldeI'Eclairage(CIE)diagrams.TheresultsindicatedthatGd1.9(MoO4)3:Dy0.13+withCIEcoordinatesof(x=0.38,y=0.41)andthecorrelativecolortemperatureof4134KisapotentialcandidateforwhiteLEDs.

简介：Aseriesofnovelbluelong-lastingphosphorescencephosphorsSr6Al18Si2O37:Eu2+,RE3+(RE3+=Ho3+,Gd3+,Dy3+andPr3+)werepreparedbytheconventionalhigh-temperaturesolid-statereactioninareductiveatmosphere.TheirpropertiesweresystematicallyinvestigatedutilizingX-raydiffraction(XRD),photoluminescence,phosphorescenceandthermoluminescence(TL)spectra.ThephosphorsemittedbluelightthatwasrelatedtotheemissionofEu2+dueto5d-4ftransition.Brightbluelong-lastingphosphorescence(LLP)couldbeobservedaftertheexcitationsourcewasswitchedoff.Fortheoptimizedsample,thebluelong-lastingphosphorescencecouldlastfornearly4hinthelightperceptionofthedark-adaptedhumaneye(0.32mcd/m2).TheeffectsofRE3+ionsonphosphorescencepropertiesofthephosphorswerestudied,andtheresultsshowedthattheco-dopingofRE3+ionsgreatlyenhancedtheintensityofthepeakaround315Kwhichwasrelatedtothelonglastingphosphorescenceofthephosphorsatroomtemperatureandconsequentlyimprovedtheperformanceofthebluephosphorescencesuchasintensityandpersistenttime.