简介:分别地,搬运器官的轻射出的设备(OLED)的层(HTL)的洞被真空免职和旋转涂层方法处理在哪儿N,N鈥?biphenyl-N,N鈥?二度(3-methylphenyl)-1,1鈥?biphenyl-4,4鈥?diamine(TPD)并且(vinylcarbazole)(PVK)poly充当了洞运输材料。Tris-(8-hydroxyquinoline)铝(Alq3)作为搬运层的轻射出的层和电子被利用。设备房间的基本结构是:indium-tin-oxide(ITO)/PVK:TPD/Alq3/Mg:Ag。设备的electroluminescent(EL)特征被描绘。结果证明EL系列的山峰在530nm被定位,它遵循了Alq3的描绘的光谱。与使用真空免职方法相比,有直到26135cd/m2的最大的发光性的绿排放能被用纺纱涂层技术选择合适的溶剂在15V的开车电压完成,并且它的最大的发光性效率是在5.5V的开车电压的2.56lm/W。CLC数字TN383+.1这个工程被部水平资助和UESTC的年轻优越工程赞助(资助号码:UESTC-2006206)
简介:AnewLDMOSTstructure,namedB-LDMOSTthathasaburiedlayerunderthedrainisproposed.Theburiedlayerisnotconnectedtothedriftregion,soitcanoptimizetheverticalfielddistributionandincreasebreakdownvoltage.TheanalysisandthesimulatedresultsshowthatB-LDMOSTcanincreasebreakdownvoltage,withalmostnegligibleinfluenceontheotherparameterssuchason-resistance,switchingtime,andsoon.
简介:Theaveragebondenergymethodispopularizedandappliedtostudybandoffsetsatstrainedlayerheterojunctions.BycarefulexaminationofhydrostaticanduniaxialstrainactionsonthebandoffsetparameterEmv,itisfoundthattheaveragebandoffsetparameterEmv,av=Em-Ev,avremainsbasicallyunchangedunderdifferentstrainconditions.Therefore,providedthebandoffsetparameterbeforestrainEmv,0ofbulkmaterialiscalculated,andtheexperimentvaluesofdeformationpotentialbandspin-orbit(SO)splittingenergy△0arequoted,theEmvatstrainedlayercanbeobtainedbyasimpleandconvenientalgebraiccalculation.Thusthevalencebandoffset△Evatstrainedlayerheterojunctincanalsobepredictedconveniently.Thissimplifiedcalcultationmethodischaracterizedbydecreasedcalculationamountandincreasedconvictionduetouseasmanyaspossibletheexperimentvalues.
简介:AnewmodeltodescribeI-Vcharacteristicsoforganiclight-emittingdevices(OLEDs)isdevelopedbasedonexperimentalresults.ThedependenceofI-Vcharacteristicsonenergybarrier,trapdensityandcarriermobilityisanalyzed.TheresultshowsthatthismodelcombinestheFowler-Nordheimtunneltheoryandthetrapchargelimitedcurrenttheorywithexponentialtrapdistribution(TCL),anditdescribesthecurrenttransportcharacteristicsofOLEDsmorecomprehensively.TheI-VcharacteristicsfollowFowler-Nordheimtheorywhentheenergybarrierishigh,thetrapdensityissmallandthecarriermobilityislarge.InothercasestheyfollowtheTCLtheory.
简介:Thispaperutilizesthecross-layerarchitecturetoimplementadaptiveresourceallocationinOrthogonalFrequencyDivisionMultipleAccess(OFDMA)basedonthebroadbandwirelessaccesssystem.Accordingtothecross-layerarchitecture,theinformationinlinklayerisusedforadaptiveresourceallocationinOFMDA.Anewcross-layeradaptiveresourceallocationalgorithmisdevelopedwhichcanguaranteetheuserstobeinminimumaveragewaitingtimeinlink-layerandgetthebetterspectrumutilization.Numericalresultsshowthatourschemeisappealingandcangetabouthalfofaveragewaitingtimelessand0.5bps/HzspectrumutilizationmorethantheschemeinIEEE802.16a.
简介:基于常规双电子锅设备,三倍的层有铟听氧化物(ITO)的二异种结构的器官的轻射出的二极管(OLED)/N,N′-diphenyl-N,N′-bis(1-naphthyl)(1,1′-biphenyl)-4,4′-diamine(NPB)/2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline(BCP)/8-Hydroxyquinoline铝(用真空免职方法的Alq3)/Mg:Ag被制作了。OLED的表演上的BCP层的不同电影厚度的影响被调查了。结果证明当BCP层电影的厚度逐渐地从0.1nm变化了到4.0nm时,OLED的电镀物品光(EL)系列从绿色变了到对蓝色,和作为与EL光谱有关的费用搬运人的再结合区域扮演的BCP层浅绿色蓝色,提高亮度和力量效率。象7.3lm/W一样高到达的OLED的力量效率。
简介:TheinvestigationonopticalpropertiesofSi1-xGex/Sistrainedlayerstructureshasbeencarriedoutactivelyinrecentyears.Thephotoluminescencehasbe-comeabriskersubjectinthestudiesofitsvariousopticalproperties.Aresearchdevelop-menttophotoluminescencepropertiesofsomenewSi1-xGex/Sistrainedlayerstruc-turesisintroduced.
简介:Atunablephotoniccrystal(PC)filterisproposedwiththetwistednematic(TN)liquidcrystal(LC)asadefectlayer.Thepolarizationsensitiveperformanceandtheeigenmodesareanalyzed.Theresultsshowthattherearetwokindsoftransmissionmodes,namelyoande,whenthevoltageislow.Thedifferentmodescanbeselectedbyrotatingthefilteraxially.Theemodeshiftstowardtheshorterwavelengthsideastheappliedvoltageincreases.Thenthepeaksoftwomodesmergeintoeachotherandthepolarizationsensitiveperformancedisappears.Thephotonicbandgapisinsensitivetothevoltage.Thetunablerangeofthefilteris53nm.