The relationship between threshold voltage and dipolar character of self-assembled monolayers in organic thin-film transistors.
The relationship between threshold voltage and dipolar character of self-assembled monolayers in organic thin-film transistors.
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DOI：
10.1021/ja303807u
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发表时间：
2012-07
影响因子：
15
通讯作者：
M. Salinas;C. M. Jäger;Atefeh Y. Amin;Pavlo O. Dral;T. Meyer-Friedrichsen;A. Hirsch;T. Clark;M. H
中科院分区：
文献类型：
--
作者：
M. Salinas;C. M. Jäger;Atefeh Y. Amin;Pavlo O. Dral;T. Meyer-Friedrichsen;A. Hirsch;T. Clark;M. H
我们报道了一项定量研究，描述了低电压有机场效应晶体管的阈值电压与自组装单层介质的分子结构之间的关系。我们观察到这种自组装分子垂直于表面的偶极矩分量与器件的阈值电压漂移呈线性相关。用三种不同的有机半导体(并五苯、α，α‘-二己基己基噻吩烯和富勒烯-C(60))在六种不同的自组装单分子膜上对模型进行了验证。通过调整构成自组装单分子膜的分子的偶极矩，发现的相关性可以帮助优化未来的设备。
We report a quantitative study that describes and correlates the threshold voltage of low-voltage organic field-effect transistors with the molecular structure of self-assembled monolayer dielectrics. We have observed that the component of the dipole moment of such self-assembled molecules perpendicular to the surface correlates linearly with the threshold voltage shift in devices. The model was validated using three different organic semiconductors (pentacene, α,α'-dihexylsexithiophene, and fullerene-C(60)) on six different self-assembled monolayers. The correlation found can help optimize future devices, by tuning the dipole moments of the molecules that constitute the self-assembled monolayer.