Transport and noise in organic field effect devices
Transport and noise in organic field effect devices
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有机场效应器件中的传输和噪声
DOI：
10.1103/physrevb.79.085405
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
P. Milde
中科院分区：
文献类型：
--
作者：
K. M. S. Gemming;R. Luschtinetz;T. Kunze;P. Lipavsk'y;L. Eng;G. Seifert;V. Pankoke;P. Milde
采用表面绿色函数方法研究了有机分子在两个Au接触引线间的输运和涨落特性。从第一性原理模拟相关的跳跃参数提取和用于计算相对于外部偏置电压的非线性输运系数。电导的交错被发现在依赖于在接触之间的挤压的分子的数量。当电压达到分子能级的值时，热性能表现出异常的行为。热电优值显示了允许达到甚至大于1的值的谐振。
The transport and fluctuation properties of organic molecules ordered parallel between two Au contact leads are investigated by the method of surface Green function. From first-principles simulation the relevant hopping parameters are extracted and used to calculate nonlinear transport coefficients with respect to an external bias voltage. A staggering of conductance is found in dependence on the number of molecules squeezed in between the contacts. The thermal properties show an anomalous behavior whenever the voltage reaches the values of the molecular energy levels active for transport. The thermoelectric figure of merit shows a resonance allowing to reach values even larger than one.