文献类型：期刊文献

中文题名：双电子传输层对有机发光二极管效率及其衰减的改善

英文题名：Improved Efficiency and Its Roll-off of Organic Light-emitting Diodes with Double Electron Transport Layers

作者：陆勍[1];陈炳月[1];杨魏强[1];张彤蕾[1];吕昭月[1]

机构：[1]华东理工大学理学院物理系,上海200237

年份：2015

卷号：36

期号：9

起止页码：1053

中文期刊名：发光学报

外文期刊名：Chinese Journal of Luminescence

收录：CSTPCD;;EI(收录号：20154101350353);Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：中央高校基本科研业务费专项资金(222201314022);上海市大学生创新训练项目(S13047)资助

语种：中文

中文关键词：发光效率;效率衰减;电子传输层;泄漏电流

外文关键词：luminous efficiency;;efficiency roll-off;;electron transport layer;;leakage current

摘要：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 m A/cm2的电流范围内没有衰减。BCP作ETL的器件的效率从50 m A/cm2时的2.5 cd/A衰减至300 m A/cm2的2.1 cd/A,衰减了16%。Cs2CO3∶BCP独自作ETL的器件效率在50~300 m A/cm2的电流范围内衰减了30%,而Bphen/Cs2CO3∶BCP作DETLs的器件效率在50~600 m A/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。
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.