期刊
ADVANCED FUNCTIONAL MATERIALS
卷 26, 期 15, 页码 2545-2553出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201504914
关键词
-
类别
资金
- Studienstiftung des deutschen Volkes
- Chinese Scholarship Council (CSC)
- cfaed (DFG Excellence Cluster)
Hyperbranched polyvinylsulfides have been prepared through a facile, metal-free, radical induced A(2) + B-3 thiol-yne polymerization of 1,3,5-tris(naphthalylethynyl) benzene and 1,4-dithiolbenzene with three different input ratios. The resulting polymers exhibit excellent optical properties like high transparency and very high refractive index (RI) of up to 1.7839, combined with high thermal stability (T-d5% up to 420 degrees C) and excellent solution processability. These properties make them ideal candidates as high RI polymeric materials (HRIP) in connection with light out-coupling schemes for organic light-emitting diodes (OLEDs). A series of hyperbranched HRIPs with varying monomer compositions have been compared in their optical properties. Finally, phosphorescent monochrome OLEDs are fabricated on top of HRIP layers to test the compatibility of HRIPs with state-of-the-art OLEDs. The results show that the HRIPs do not deteriorate the performance of the OLEDs while maintaining external quantum efficiencies of over 20% for phosphorescent red OLEDs. These results open a pathway toward alternative, low-cost, and scalable out-coupling concepts through refractive index matching of the OLED materials and the HRIPs presented.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据