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1、www.advmat.dewww.MaterialsViews.comCOMMUNICATIONBroadbandLightExtractionfromWhiteOrganicLight-EmittingDevicesbyEmployingCorrugatedMetallicElectrodeswithDualPeriodicityYan-GangBi,JingFeng,*Yun-FeiLi,Xu-LinZhang,Yue-FengLiu,YuJin,andHong-BoSun*Whiteorganiclight-emittingdiodes(WOLEDs)
2、areofinteresttoreplaceITOastheanodecouldeliminatethepowerlosttoonthegroundsoftheirpotentialapplicationsforfull-color?at-theWGmodesinITO.[3,12]Inthiscase,lighttrappedinthepaneldisplaysandsolid-statelighting.[1,2]HighefTciencyisaSPPmodeswouldrepresentthemainpowerlost,andthere-keyissu
3、efortheircommercialapplications,whileaverylowfore,highlyefTcientlightextractioncouldbeexpectedbylightextractionefTciencyoflessthan20%isastumblingblockbroadbandexcitationandoutcouplingoftheSPPmodesinforthishighefTciency.Morethan80%photonsproducedbytheWOLEDs.Recently,theuseofdualplas
4、monicnanostruc-excitondecayaretrappedinsideOLEDsintheformofwave-tureswithAunanoparticlesembeddedinaperiodiccorrugatedguide(WG)modesinorganic/indiumDtinoxide(ITO)anodeactivepolymerlayerbynanoimprintinghasbeenreportedtolayers,surfaceplasmonDpolariton(SPP)modesassociatedwithachievebro
5、adbandlightabsorptioninorganicsolarcells,[13]themetallicelectrode/organicinterface,andsubstratemodeswhichmightprovideapossibilitytoexcitebroadbandSPPfromtotalinternalre?ectionattheglasssubstrate/airinter-modesforWOLEDs.However,nanoimprintingisusuallyappli-face.[3D5]Thesetrappedphot
6、onsrepresenttheareainwhichcabletopolymerTlmsandhaslimitationsinsmall-molecule-thereisstillthegreatestscopeforsigniTcantimprovementsinbaseddevices.Herein,broadbandexcitationandoutcouplingofefTciencythroughanefTcientrecoveryofthelostpower.Broad-theSPPmodesinWOLEDshasbeenrealizedbyint
7、roducingbandextractionisimportantfortheefTcientoutcouplingofatwo-dimensional(2D)gratingwithdual-periodiccorruga-thetrappedphotons,especiallyforthosetrappedinWOLEDstionintotheWOLEDs.The2Dgratingconsistsoftwosetswhosespectracoversthewholevisiblewavelength.Broadbandofcorrugationswithd
8、ifferentperiodsthatcanbroa
