领域效应移动性在区域中的纳米结构依赖 常规的聚3-基) 薄膜场效应晶体管
Rui Zhang1, Bo Li, Mihaela C Iovu
1Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, USA.
Journal of the American Chemical Society
|March 16, 2006
概括
研究人员研究了用于晶体管的聚烯半导体. 他们发现,聚合物纳米纤维的宽度直接影响电荷载体的移动性,突出了分子结构对于有机电子学中有效的电荷传输的重要性.
科学领域:
- 有机电子学有机电子学
- 聚合物科学 聚合物科学
- 材料科学是一种材料科学.
背景情况:
- 区域常规聚烯是有希望的有机半导体.
- 控制聚合物形态对于优化设备性能至关重要.
- 了解结构-属性关系是推动有机场效应晶体管 (OFET) 发展的关键.
研究的目的:
- 为了研究分子重量,纳米纤维状形态和基于聚烯的场效应晶体管 (FET) 中的电荷传输之间的关系.
- 确定聚合物链形状如何影响自我组装成有序结构.
- 为了阐明纳米纤维尺寸对电荷载体移动性的影响.
主要方法:
- 溶液造低多分散性的区域常规聚烯,具有不同分子重量 (2-13kDa).
- 原子力显微镜 (AFM) 用于分析表面形态.
- 草地发生小角度X射线散射 (GISAXS) 探测纳米结构.
- 场效应晶体管 (FET) 的制造和表征.
主要成果:
- 聚合物链自组装成正规的纳米纤维状形态.
- 发现纳米纤维的宽度与聚合物的重量平均轮长度成正比.
- 结合聚合物骨干的方向垂直于纳米纤维轴.
- 在FET中,电荷载体的移动性显示出对纳米纤维宽度的指数级依赖.
结论:
- 该研究表明,聚合物链长度,纳米纤维宽度和电荷运输效率之间存在直接相关性.
- 在有序的纳米纤维结构内延伸的结合通路对于高电荷载体的移动性至关重要.
- 精确控制聚合物自我组装对于设计高性能有机电子设备至关重要.
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