在有机薄膜晶体管中,自组装单层的值电压和双极性质之间的关系
Michael Salinas1, Christof M Jäger, Atefeh Y Amin
1Organic Materials & Devices, Institute of Polymer Materials, University Erlangen-Nürnberg, Erlangen, Germany.
Journal of the American Chemical Society
|June 27, 2012
概括
我们发现,自组装单层的分子二极极矩直接影响有机场效应晶体管门电压. 这种相关性有助于通过调整介电性质来优化有机电子设备的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 表面化学 表面化学
背景情况:
- 有机场效应晶体管 (OFET) 对于灵活的电子产品至关重要.
- OFET 的性能对介电接口非常敏感.
- 自组装单层 (SAM) 被广泛用于OFET中的介电层.
研究的目的:
- 量化关联SAM介电物的分子结构与低压OFET的值电压.
- 建立基于SAM属性的OFET值电压的预测模型.
- 引导SAM的合理设计,以提高OFET性能.
主要方法:
- 使用各种有机半导体制造低压OFET.
- 形成具有系统变化的分子结构和双极时刻的SAM.
- 确定值电压的OFET设备的电气特性.
- 在SAM分子结构 (特别是二极极矩) 和设备值电压之间的相关性分析.
主要成果:
- 在垂直于表面的SAM分子二极极矩组成部分和OFET值电压转移之间观察到线性相关性.
- 该模型在三个不同的有机半导体 (pentacene,α,α'-dihexylsexithiophene,fullerene-C(60) 上得到了验证.
- 采用了六种不同的SAM,证明了观察到的相关性的广泛适用性.
结论:
- SAM分子的垂直二极极矩是控制OFET值电压的关键参数.
- 这种定量理解可以通过介电层的分子设计来优化OFET.
- 这些发现有助于开发高性能有机电子设备.
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