一种新型交联电子传输材料在OLED中的应用  

Application of A Novel Cross-linkable Electron Transport Material in OLED

作　　者：高朝 谢黎明 苏文明[1] 崔铮[1,2] 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)

机构地区：[1]中国科学院苏州纳米技术与纳米仿生研究所,印刷电子技术研究中心,江苏苏州215123 [2]上海科技大学物质科学与技术学院,上海201210

出　　处：《发光学报》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。

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.

关 键 词：交联材料 电子传输层 电子注入能力 溶液法 倒置OLED 

分 类 号：O482.31[理学—固体物理]