摘要
设计并合成了一种新型的可交联电子传输材料TV-T2T。该材料经过热交联之后具有优异的抗溶剂特性,并且TV-T2T的LUMO能级为-3.5 eV,这将更有利于电子从ZnO层注入到发光层中。另外,溶液法制备的三层薄膜ZnO/TV-T2T/2,6-Dczppy∶Ir(mppy)3,其粗糙度低至2.27 nm,优于未加入TV-T2T电子传输层的双层薄膜(2.37 nm),可以有效减少漏电流的产生。随后,将TV-T2T应用于三层溶液法制备的倒置有机发光二极管中,获得了5.1%EQE的器件性能,是不加TV-T2T的器件性能(EQE为3.0%)的1.7倍。
A new cross-linkable electron transport layer(ETL)material,2,4,6-tris(4′-vinyl-[1,1′-biphenyl]-3-yl)-1,3,5-triazine(TV-T2T)was designed and synthesized.The film formation of the cross-linkable material TV-T2T has the excellent solvent resistance.The lowest unoccupied molecular orbital(LUMO)level of TV-T2T is-3.5 eV,which could deliver efficient charge injection from the zinc oxide(ZnO)to the emission layer.In addition,the surface roughness of 2.27 nm in the film of triple-layer ZnO/TV-T2T/2,6-Dczppy∶Ir(mppy)3,is lower than that of the film without TV-T2T(2.39 nm),resulting in a reduced leakage current.The solution-processed inverted OLED with ETL material TV-T2T,achieved an EQE of 5.1%compared to the 3.0%EQE of the device without TV-T2T layer,demonstrating an improvement of 1.7-fold for the inverted OLEDs.
作者
高朝
谢黎明
苏文明
崔铮
GAO Zhao;XIE Li-ming;SU Wen-ming;CUI Zheng(Printable Electronics Research Center,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,China;School of Physical Science and Technology,Shanghai Tech University,Shanghai 201210,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2020年第9期1093-1101,共9页
Chinese Journal of Luminescence
基金
国家重点研发计划(2016YFB0401600)资助项目。
关键词
交联材料
电子传输层
电子注入能力
溶液法
倒置OLED
cross-linkable material
electron transport layer
electron injection property
solution processing
inverted organic light emitting diodes
