简介：Apulsedcurrentisintroducedintothetraditionalcoaxiallasercladdingprocesstodecreasetheporosityofthecladdinglayer.Themagnetocontractionforcecausedbypulsedcurrentexertedonthemoltenpoolsqueezesthegasoutandcompensatestheshrinkageduringmoltenpoolsolidification.Asaresulttheporosityofthecladdinglayerisdecreasedtoanextremelylowdegree.Simultaneously,thegrainofthecladdinglayerisfinerwiththeaddedsupercoolingdegreewithpulsedcurrent.Themicrohardnessofanequiaxedzoneinthecrosssectionofacladdinglayeralsoincreases.

简介：WecreateaGaNphotocathodebasedongradedAlxGa1-xNbufferlayerstoovercometheinfluenceofbuffer-emissionlayerinterfaceonthephotoemissionoftransmission-modeGaNphotocathodes.Agateshapedspectralresponsewitha260-nmstartingwavelengthanda375-nmcut-offwavelengthisobtained.Averagequantumefficiencyis15%andshortwavelengthresponsesarealmostequivalenttolongwavelengthones.Thefittedinterfacerecombinationvelocityis5×104cm/s,withnegligiblemagnitude,provingthatthedesignofthegradedbufferlayersisefficientinobtaininggoodinterfacequalitybetweenthebufferandtheemissionlayer.

简介：Wefabricatewhitephosphorescentorganiclight-emittingdiodes(PHOLEDs)withthreedopantsanddoubleemissivelayer(EML)toachievecolorstability.ThewhitePHOLEDsuseFIrpicdopantforblueEML(BEML),andIr(ppy)3:Ir(piq)3dopantsforgreen:redEML(GR-EML)withN,N′-dicarbazolyl-3,5-benzene(mCP)ashostmaterial.ThicknessesofB-EMLandGR-EMLareadjustedtoformanarrowrecombinationzoneattwoEML’sinterfaceandchargetrappinghappensinEMLaccordingtowidehighestoccupiedmolecularorbitaland/orlowestunoccupiedmolecularorbitalenergybandgapofmCPandsmallerenergybandgapofdopants.ThetotalthicknessofbothEMLsisfixedat30nminthedevicestructureofITO(150nm)/MoO3(2nm)/N,N′-diphenyl-N,N′-bis(l-naphthyl-phenyl)-(l,l′-biphenyl)-4,4′-diamine(70nm)/mCP:Firpic-8.0%(12nm)/mCP:Ir(ppy)3-3.0%:Ir(piq)3-1.5%(18nm)/2′,2′,2′′-(1,3,5-benzinetriyl)-tris(1-phenyl-1-H-benzimidazole)(30nm)/8-hydroxyquinolinolato-lithium(2nm)/Al(120nm).WhitePHOLEDshows18.25cd/Aofluminousefficiencyandwhitecolorcoordinatesof(0.358and0.378)at5000cd/m2andcolorstabilitywithslightCIEXYchangeof(0.028and0.002)asincreasingluminancefrom1000to5000cd/m2.

简介：Theoreticalanalysisoftheelectromagneticfielddistributioninthefocalregionofalongmetallicparabolicreflectorthathasitssurfacecoveredwithamagnetizedplasmalayerisderived.Theincidentwaveisconsideredtobewithageneralobliqueincidenceforbothparallelandperpendicularpolarizations.TheelectromagneticfieldintensityexpressionsalongthefocalregionareobtainedaccuratelyusingMaslov’smethod.Theeffectsofplasmathicknessonthereflectedandtransmittedfielddistributionsareinvestigated.Theeffectsofotherphysicalparameterssuchastheangleofincidenceandtheplasmaandcyclotronfrequenciesonthetransmittedfieldintensitydistributionalongthefocalregionarealsostudied.TheresultsobtainedbyMaslov’smethodandKirchhoff’sapproximationarefoundtobeinagoodagreement.