简介:Organicconductorisakindoforganiccompoundwhichhasspecialelectronicandmagneticproperties.Theresearchoftheorganiccompoundshasreceivedconsiderableattentionbecauseoftheirpotentialapplicationsinmanyareas.Themolecularconductiveunitsaretheoreticallyinvestigatedaswellastheirenergygapandchargedistribution.Therelationshipofconductivityandmicro-mechanismisdiscussed.
简介:Photoelectricpropertyofpolyanilinedopedwithdodecyl-benzeneincreasesobviously,whenpolyanilinedopedwithDBSAisirradiatedwithlight,Mixtureofsensitivematerialisadvantageoustotheabsorptionofpolyanilineinvisiblelightspectrum,andtheconductivityisalsoimproved.TheresultsofdielectricmeasurementsonpolyanilinedopedwithDBSAinanAl-PAn-DBSA-Alconfigurationasfunctionoffrequencyandtemperaturearereported.Thespace-chargepolarizationphenomenonisobserved.Carrierlifetimeismicrosecondmagnitudeandmobilityis(0.001-0.1)cm^2/V·s,whichareobtainedbycalculationorexperiment.Theactiveenergyisobtainedfromtherelationbetweenconductivityandtemperature.TheconductingmechanismofPAn-DBSAisanalyzed.
简介:Superlatticesconsistingofalternatinglayersoforganic/polymericmaterialshavebeenfabricatedfromtris(8-hydroxyquinoline)aluminum(Alq3)andpoly(N-vinylcarbazole)(PVK)byamultisource-typehigh-vacuumorganicmoleculardeposition.ThecharacteristicsofsuperlatticestructuresaredeterminedbythesmallangleX-raydiffraction,opticaladsorptionandphotoluminescence.Theelectroluminescentdeviceswiththesuperlatticestructurehavealsobeenfabricatedandtheemissioncharacteristicsarediscussed.
简介:有有限阴极联系的欧姆的阳极接触和注射的一个双性人层模型被建议了计算再结合效率和设备的再结合区域宽度。洞传送层的厚度和联合效率和再结合宽度上的organic/organicinterface的障碍的效果被讨论了。它被发现那:(1)当电子充分被堵住,洞没在theorganic/organic接口显著地被堵住时,为给定的L_h/L,再结合效率与增加应用电压增加,但是在更高应用的电压,有增加L_h/L的再结合效率减少;(2)有增加的再结合效率增加使用了电压andH′_h,并且什么时候使用了电压和H′_h超过某价值,再结合效率作为一个高原出现;(3)有增加应用电压和L_h/L.This模型的再结合宽度减少可能向相对实验解释现象。
简介:AnewmodeltodescribeI-Vcharacteristicsoforganiclight-emittingdevices(OLEDs)isdevelopedbasedonexperimentalresults.ThedependenceofI-Vcharacteristicsonenergybarrier,trapdensityandcarriermobilityisanalyzed.TheresultshowsthatthismodelcombinestheFowler-Nordheimtunneltheoryandthetrapchargelimitedcurrenttheorywithexponentialtrapdistribution(TCL),anditdescribesthecurrenttransportcharacteristicsofOLEDsmorecomprehensively.TheI-VcharacteristicsfollowFowler-Nordheimtheorywhentheenergybarrierishigh,thetrapdensityissmallandthecarriermobilityislarge.InothercasestheyfollowtheTCLtheory.
简介:Organicgreenlightemittingdevices(LEDs)withmulti-quantumwell(MQW)structurewerefabricated.Aromaticdiamine(TPD)wasusedasholetransportinglayerandpotentialbarrierlayer;Tris(8-hydroxyquinoline)aluminunum(Alq3)wasactedaselectron-transportingemitterandMQWgreenemitter.Airstablealuinum(Al)wasusedaselectron-injectioncontact.Theinfluenceofthethicknessofpotentialbarrierlayerandthenumberofquantumwellontheelectroluminescent(EL)efficienciesofthedeviceswasinvestigated.TheorganicLEDswithtwoquantumwellsshowedenhancedELefficiencies.Maximumexternalquantumefficiencyandbrightnesswere1.04%and7000cd/m^2,respectively.
简介:Organicsemiconductoe3,4,9,10-perylenetetracarboxylicdianhydride(PTCDA)hasbeensynthetizedwith1,8-naphthalicanhydrideusingchemicalmethod.X-raydiffractionspectrumshowsthatitismonoclinic.Visibleabsorptionspectrumshowsthatitsgapbandis2.2eVwithsingletexcitonbandwidthof0.9eV.
简介:Throughexperimentsandcomputersimulation,theinfluenceoftheenergylevelsoforganicmaterialsandelectrodematerialsintheorganiclight-emittingdiodes(OLEDs)onthedeviceperformancesisdiscussed.Resultsshowthatthedeviceperformancesareinfluencedbynotonlythecarrierinjectionbarriersattheelectrodeinterfacebutalsothebarriersattheorganicheterojunctioninterface.ThisresultishelpfultotheselectionoftheorganicmaterialsandtheirarrangementintheoptimaldesignofOLEDs.
简介:Aneworganicsemiconductortartaricaciddopedsaltofemeraldinepolyaniline(PANI-C4H6O6)hasbeenobtainedbythemethodofoxidativepolymerizationofmonomericanilinewithammoniumpersulfateinacidicsolution.ThestructurewascharacterizedbyFourierTransformInfraredtechnique(FTIR)andX-raydiffraction(XRD).Thetemperaturedependencedcconductivityδdc(T)showsasemiconductorbehaviorandfollowsthequasionedimensionalvariablerangehopping(Q1D-VRH)model.Dataonδdc(T)arealsodiscussed.
简介:Organicmultiplequantumwells(OMQWs)consistingofalternatinglayersoforganicmaterialshavebeenfabricatedfromtris(8-hdroxyquinoline)aluminum(Alq)and2-(4-biphenylyl)-5-(4-tertbutylphenyl)-1,3,3-oxadiazole(PBD)byamultisource-typehigh-vacuumorganicmoleculardeposition.Fromthesmall-angleX-raydiffractionpatternsofAlq/PBDOMQWs,aperiodicallylayeredstructureisconfirmedthroughtheentirestack.TheAlqlayerthicknessintheOMQWswasvariedfrom1nmto4nm.Fromtheopticalaborption,photoluminescenceandelectroluminescencemeasurements,itisfoundthattheexcitonenergyshiftstohigherenergywithdecreasingAlqlayerthickness,ThechangesoftheexcitonenergycouldbeinterpretedastheconfinementeffectsofexcitonintheAlqthinlayers.Narrowingoftheemissionspectrumhasalsobeenobservedfortheelectroluminescentdevices(ELDs)withtheOMQWsstructureatroomtemperature.