在甲基装饰的三合体中,柱状半形体是用于增强电荷传输的
Constanza Ruiz1,2, Raúl Martín1,3, Angela Benito1
1Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco 28049, Madrid, Spain.
这项研究介绍了TRISMe,一种新型的半导体液晶,可以形成稳定的柱状结构. 经化处理的TRISMe表现出显著更高的电荷流动性,证明了其对先进电子设备的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 超分子化学 超分子化学
背景情况:
- 迪斯科式液晶由于其自组装特性,对有机电子有很大的希望.
- 控制分子包装和超分子组织对于优化电荷传输至关重要.
- 基于三醇的分子为设计功能性液晶提供了独特的核心结构.
研究的目的:
- 为了合成和描述一种新的半导体基于三醇的光盘液晶 (TRISMe).
- 调查甲基基对TRISMe的超分子组织和中相行为的影响.
- 根据不同的加工方法 (溶液与融化) 来评估TRISMe的电荷传输特性.
主要方法:
- 合成和特征的TRISMe化合物.
- 不同扫描热度计 (DSC) 和偏光光学显微镜 (POM) 用于中相分析.
- 单晶X射线衍射用于结构阐明.
- 空间电荷有限电流 (SCLC) 测量用于二极管类型设备中的孔移动性.
- 用于溶液处理设备的有机场效应晶体管 (OFET) 的制造和测试.
主要成果:
- 在加热后,TRISMe形成了一个稳定的柱状六角相位相,由外围甲基基团促进,防止紧密包装.
- 单晶分析证实了柱状结构的倾向以及甲基团的稳定作用.
- 在二极管类型设备中经过化处理的TRISMe具有高孔移动性 (3 × 10−1 cm2/V·s).
- 在OFET中经过溶液处理的晶体TRISMe显示出较低的孔移动性 (3 × 10−4 cm2/V·s).
结论:
- 甲基功能化有效地促进了基于三醇的液晶中稳定的柱状半相.
- 与溶液处理相比,TRISMe的化处理导致更优的电荷传输,这归因于有利的超分子组装.
- TRISMe是开发具有高性能,易于加工的有机电子设备的有希望的材料.
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