基于PVK的有機(jī)電致磷光器件發(fā)光機(jī)理研究.pdf

1、河北大學(xué)碩士學(xué)位論文基于PVK的有機(jī)電致磷光器件發(fā)光機(jī)理研究姓名：王利順申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：光學(xué)工程指導(dǎo)教師：楊少鵬20100501AbstractIIAbstractganiclightemittingdiodes(OLEDs)havereceivedincreasingattentioninthedevelopmentofadvancedflatpaneldisplaytechnologybecauseofitslowweigh

2、tbroadvisualanglelowcostfastresponsespeedactiveemittinghighbrightnesshighefficiencythecapabilitytosupptfullcoldisplay.AlthoughtheproductionofOLEDshasbeencommercializedmuchwkremainstoenhancetheproductperfmanceachievemarke

3、tadvantage.InthisdissertationwehavemadesomemeaningfulwksrelatingtotheimprovingefficiencycolstabilityofOLEDsItincludesthefollowingitems:1)Theexcitonsneedtobeeffectiveusedtoimprovetheefficiencyoflightemittingdevicessoitsho

4、uldbetiedasmanyaspossibleinthelightemittinglayertoavoidquenchingbytheelectrodeswhenitspreadstotheouterregionofthelightemittinglayer.InthispaperthedynamicsofexcitonquenchinginapolymerPVKdopedwithphosphescentguestmaterials

5、FirPic、Ir(piq)2(acac)、Ir(ppy)3respectivelywhichduetothepresenceofmetalfilmsisanalyzedusingtimeresolvedphotoluminescence.Thedecayoftheluminescencefvariouspolymerlayerthicknessesisdescribedbyaonedimensionaldiffusionmodelwh

6、ichhasbeenprovedtobecrect.TheenergytransferdistanceexcitondiffusionlengthderivedfPVKdopedwithphosphescentguestmaterialsis10nm9nm15nm29.3nm、30.1nm、30.9nm.Thiscandisentanglethecontributionsfromdirectenergytransfertothemeta

7、lexcitonmigrationtotheexcitonquenchingprocess.Thewidthoftheexcitonquenchingregionofthedopingsystemis39.3nm、39.1nm45.9nm.Itcanprovideguidanceonpreparationofthedevice.Thediffusionparametersderivedinthiswkarealsovaluablefmo

8、delingotherpolymerbasedoptoelectronicdeviceswiththesamelayerheterostructuregeometry.2)Manymethodstoimprovethecolstabilityhavebeenreptedintheliterature.Theseincludethecontroloftheexcitonrecombinationzonebyintroducingacarr

9、ierblockinglayerthefabricationofasingleemittinglayerdevice.Thesingleemittinglayerdoubleemittinglayerwhiteganicdevicewhichdopedwithphosphescentguestmaterialsarefabricatedusingtheresultofaboveresearch.TheCIEcodinateofthesi