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高等离子对齐孔的拓设计,用于溶液处理的OLED分子瓶刷

Nari Kang, Sangho Cho, Eric E Leonhardt

¹The Dow Chemical Company, Midland, Michigan 48667, United States.

Journal of the American Chemical Society

|April 26, 2022

概括

研究人员开发了用于增强孔输送层 (HTL) 的新型瓶聚合物. 这种新设计实现了孔输送单元的平行对齐,大大提高了有机发光二极管的效率.

科学领域:

材料科学
聚合物化学
有机电子

背景情况:

溶液处理的孔输送层 (HTL) 对有机电子非常重要.
在聚合物HTL中实现穿孔输送 (HT) 部分的异构包装仍然是一个挑战.
已知HT部分的基板平行对齐可以提高小分子中的装置性能.

研究的目的:

开发一种聚合物架构,使溶液处理的HTL中HT部分能够与基板平行定位.
克服扩展小分子对齐策略到聚合物系统的局限性.
通过可控聚合物设计提高有机发光二极管 (OLED) 的效率.

主要方法:

用精确控制的功能侧链来合成瓶聚合物.
加入三胺 (TPA) 用于孔运输和基替代基烯用于空气接口迁移.
单层HTL薄膜的制造使用旋和热.

主要成果:

瓶刷聚合物脊柱垂直排列,而吊TPA接种器则与基板平行.
在HTL膜中沿外平面方向实现高TPA π堆积.
与线性聚合物类似物相比, 有机发光二极管的效率提高了一倍.

结论:

瓶刷聚合物拓是一种有效的策略,用于在聚合物HTL中实现HT部分的异性包装.
这种可控对齐显著提高了充电传输和设备的性能.
开发的HT瓶刷 (HTB) 聚合物为高效溶液加工的OLED提供了一个有前途的途径.

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