White Organic Light Emitting Devices Based on Multiple Emissive Nanolayers

Nano-Micro Letters

T. S. Huang and Yi-Chun Chen¹  Yan Kuin Su¹  M. V. Madhava Rao*¹ 

关键词: Multilayer structure;    Organic light-emitting device;    White emission;   

DOI  :  10.3786/nml.v2i4.p242-246

来源: Open Access House of Science and Technology

【 摘 要 】

Inthispaper,awhiteorganiclight-emittingdevice(WOLEDs)withmultiple-emissive-layerstructurehasbeenfabricated.Thedevicehasasimplestructureofindiumtinoxide(ITO)/NPB(20nbsp;nm)//DPVBi(20nm)/CDBP:xIr(btp)2acac(10nm)/Alq3(25nm)/BCP(5nm)/CsF(1nm)/Al(150nm)(x=0.15,2.5and3.0wt%),whereNPBandBCPnbsp;areusedasthehole-injectinglayer,electrontransportingandholeblockinglayer,respectively.WhitelightemissionwasrealizedinanOLEDwith2.5%Ir(btp)2acacdopingconcentration.Thedeviceexhibitspeakefficiencyof1.93cd/Aat9Vandmaximumbrightnessof7005cd/m2at14V.TheCommissionInternationaldeI’Eclairage(CIE)(1931)coordinatesofwhiteemissionarewellwithinthewhitezone,whichmovesfrom(0.35,0.33)to(0.26,0.30)whentheappliedvoltageisvariedfrom5Vto14V.nbsp;

【 授权许可】

Unknown