Cascade hole transport in efficient green phosphorescent light-emitting devices achieved by layer-by-layer solution deposition using photocrosslinkable-conjugated polymers containing oxetane side-chain moieties
作者:Jicheol Shin、Hyun Ah Um、Min Ju Cho、Tae Wan Lee、Kyung Hwan Kim、Jung-Il Jin、Seogshin Kang、Taehan Park、Sung Hoon Joo、Joong Hwan Yang、Dong Hoon Choi
DOI:10.1002/pola.25044
日期:2012.1.15
N‐bis(4‐ (4,4,5,5‐tetramethyl‐1,3,2‐dioxaborolan‐2‐yl)phenyl)aniline via a Suzuki coupling reaction. When the oxetane groups were photopolymerized in the presence of a cationic photoinitiator, the photocured film showed good solvent resistance and compatibility with a poly(N‐vinylcarbazole) (PVK)‐based emitting layer. Without the use of a conventional hole injection layer (HIL) of poly(3,4‐ethylen
使用两种具有不同分子能级的光可交联聚合物在铟锡氧化物(ITO)层上制造了空穴注入/传输双层结构。使用2,7-(或3,6-)-二溴-9-(6-(((3-甲基氧杂环丁烷-3-基)甲氧基)己基)-9H-咔唑)和2,4-二甲基合成了两种光反应性聚合物- ñ,ñ -双(4-(4,4,5,5-四甲基-1,3,2-二氧硼杂环戊烷-2-基)苯基)苯胺通过Suzuki偶联反应。当氧杂环丁烷基在阳离子光引发剂的存在下光聚合时,光固化膜表现出良好的耐溶剂性并与聚(N乙烯基咔唑(PVK)基发光层。如果不使用传统的聚(3,4-乙撑二氧噻吩)/(聚苯乙烯磺酸盐)(PEDOT:PSS)的空穴注入层(HIL),则所得的绿色发光器件的PVK为:5-4叔-1-丁基苯基-1,3,4-恶二唑(PBD):Ir(Cz-ppy)3的最大外部量子效率为9.69%; 对于设备K‐4配置ITO / POx‐I / POx‐II / PVK:PBD:Ir(Cz‐ppy)3