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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >A thermoelectric voltage effect in polyethylene oxide
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A thermoelectric voltage effect in polyethylene oxide

机译：聚环氧乙烷中的热电电压效应

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The conductivity of polyethylene oxide (PEO) is described with a three-dimensional hopping model considering electrostatic interactions between the ions. Ions fluctuate over energy-barriers in a multi-well potential. To decide whether positive or negative charges are responsible for this conductivity, the thermoelectric voltage is measured. The samples are embedded between two aluminium-electrodes. The oxide on the interface between the electrodes and the PEO serves as a blocking layer. The temperature of each electrode is controlled by a Peltier element. A temperature step is applied to one electrode by changing the temperature of one of the Peltier elements. Due to this temperature gradient, the mobile charges fluctuate thermally activated from the warmer side to the colder side of the sample. The direction of the measured thermoelectric voltage indicates the type of mobile charges. It is found that positive charges are mobile. Further, it is shown that the absolute value of the thermoelectric voltage depends on the energy-barrier heights in the multi-well potential. [References: 13]
机译：考虑到离子之间的静电相互作用，使用三维跳变模型描述了聚环氧乙烷（PEO）的电导率。离子在多势阱中的能垒上波动。为了确定是由正电荷还是由负电荷引起的电导率，需要测量热电电压。样品嵌入在两个铝电极之间。电极和PEO之间的界面上的氧化物用作阻挡层。每个电极的温度由珀耳帖元件控制。通过改变珀耳帖元件之一的温度，将温度阶梯施加到一个电极上。由于该温度梯度，移动电荷从样品的较热侧向较冷侧热活化。测得的热电势的方向指示了移动电荷的类型。发现正电荷是可移动的。此外，示出了热电电压的绝对值取决于多阱电势中的能量势垒高度。 [参考：13]

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