发光学报
髮光學報
발광학보
CHINESE JOURNAL OF LUMINESCENCE
2015年
9期
1053-1058
,共6页
陆勍%陈炳月%杨魏强%张彤蕾%吕昭月
陸勍%陳炳月%楊魏彊%張彤蕾%呂昭月
륙경%진병월%양위강%장동뢰%려소월
发光效率%效率衰减%电子传输层%泄漏电流
髮光效率%效率衰減%電子傳輸層%洩漏電流
발광효솔%효솔쇠감%전자전수층%설루전류
luminous efficiency%efficiency roll-off%electron transport layer%leakage current
采用Bphen和BCP制成双电子传输层( Double electron transport layers,DETLs)的有机发光二极管器件,与Bphen单独作ETL的器件相比, DETLs器件具有较小的空穴漏电流,效率提升10%。与BCP独自作ETL的器件相比,更多的电子注入使DETLs器件的效率在50~600 mA/cm2的电流范围内没有衰减。 BCP作ETL的器件的效率从50 mA/cm2时的2.5 cd/A衰减至300 mA/cm2的2.1 cd/A,衰减了16%。 Cs2 CO3∶BCP独自作ETL的器件效率在50~300 mA/cm2的电流范围内衰减了30%,而Bphen/Cs2 CO3∶BCP作DETLs的器件效率在50~600 mA/cm2的电流范围内衰减幅度为0,原因是Bphen阻挡了Cs原子扩散至发光层。
採用Bphen和BCP製成雙電子傳輸層( Double electron transport layers,DETLs)的有機髮光二極管器件,與Bphen單獨作ETL的器件相比, DETLs器件具有較小的空穴漏電流,效率提升10%。與BCP獨自作ETL的器件相比,更多的電子註入使DETLs器件的效率在50~600 mA/cm2的電流範圍內沒有衰減。 BCP作ETL的器件的效率從50 mA/cm2時的2.5 cd/A衰減至300 mA/cm2的2.1 cd/A,衰減瞭16%。 Cs2 CO3∶BCP獨自作ETL的器件效率在50~300 mA/cm2的電流範圍內衰減瞭30%,而Bphen/Cs2 CO3∶BCP作DETLs的器件效率在50~600 mA/cm2的電流範圍內衰減幅度為0,原因是Bphen阻擋瞭Cs原子擴散至髮光層。
채용Bphen화BCP제성쌍전자전수층( Double electron transport layers,DETLs)적유궤발광이겁관기건,여Bphen단독작ETL적기건상비, DETLs기건구유교소적공혈루전류,효솔제승10%。여BCP독자작ETL적기건상비,경다적전자주입사DETLs기건적효솔재50~600 mA/cm2적전류범위내몰유쇠감。 BCP작ETL적기건적효솔종50 mA/cm2시적2.5 cd/A쇠감지300 mA/cm2적2.1 cd/A,쇠감료16%。 Cs2 CO3∶BCP독자작ETL적기건효솔재50~300 mA/cm2적전류범위내쇠감료30%,이Bphen/Cs2 CO3∶BCP작DETLs적기건효솔재50~600 mA/cm2적전류범위내쇠감폭도위0,원인시Bphen조당료Cs원자확산지발광층。
Efficiency and its roll-off are improved by using double electron transport layers ( DETLs) in organic light-emitting diodes ( OLEDs) . When DETLs of Bphen/BCP are employed, device effi-ciency is enhanced by 10% compared to the device with single Bphen as an electron transport layer ( ETL) because of lower hole leakage current. Meanwhile, due to more electrons injected, efficien-cy roll-off of 0% is observed for the Bphen/BCP-based device with the increase of current density from 50 to 600 mA/cm2 . On the contrast, the device with single BCP as ETL has an efficiency roll-off of 16%, which is reduced from 2. 5 cd/A at 50 mA/cm2 to 2. 1 cd/A at 300 mA/cm2 . Com-pared to the Cs2 CO3∶BCP-ETL-based device with an efficiency roll-off of 30% from 50 to 300 mA/cm2 , device efficiency is declined by 0% within the range from 50 to 600 mA/cm2 as DETLs of Bphen/Cs2 CO3∶BCP are explored. The reason is the blocking of Cs atom interdiffusion into the em-issive layer by the Bphen of Bphen/Cs2 CO3∶BCP.
