通过对 diketopyrrolopyrrole 基低带间隙聚合物的形态学控制,将化学结构与设备性能联系起来
Feng Liu1, Cheng Wang, Jayanta K Baral
1Department of Polymer Science and Engineering, University of Massachusetts Amherst , Amherst, Massachusetts 01003, United States.
Journal of the American Chemical Society
|December 4, 2013
概括
研究基于二甲基基 (DPP) 的聚合物揭示了有机电子中的结构-形态-性能联系. 溶剂加工微调形态,提高有机场效应晶体管 (OFET) 和有机光伏 (OPV) 的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 聚合物化学 聚合物化学
背景情况:
- 基于二甲 (DPP) 的低频段间隙聚合物对于有机场效应晶体管 (OFET) 和有机光伏 (OPV) 至关重要.
- 了解结构-形态-性能关系是优化这些材料的关键.
研究的目的:
- 研究DPP基聚合物的化学结构变化如何影响其物理性质和设备性能.
- 探索溶剂和添加剂在控制薄膜形态和设备特性的作用.
主要方法:
- 合成基于DPP的低频段间隙聚合物,具有多种捐助核.
- 使用单溶剂和溶剂混合物进行薄膜加工.
- 使用共振软X射线散射的结晶行为和混合物形态的表征.
- 用于OFET和OPV的设备制造和性能测试.
主要成果:
- 化学结构的修改显著改变了晶体行为,混合物形态和设备性能.
- 从溶剂混合物进行加工,增强了边缘方向和纤维的形成.
- 大量异质连接 (BHJ) 中的溶剂混合物混合了减少相位分离,创造了纤维状网络形态,提高了OPV性能.
- 响应软X射线散射揭示了聚合物链在纤维体内包装的洞察力.
结论:
- OPV的形态和性能与纤维状网络的特征长度尺度直接相关.
- 处理条件对OFET和OPV的形态学和性能产生重大影响.
- 类似的处理策略可用于优化基于DPP聚合物的OFET和OPV设备.
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