Herein, we report the electrical conductivity and Seebeck coefficients of air-stable, thin films of poly([N,N′-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5′-(2,2′-bithiophene)) embedded with β-Ag₂Te nanowires. Three different length nanowires (∼2600, ∼800, and ∼300 nm) were synthesized and combined with the polymer to yield composite thin films. The room temperature electrical conductivity values of thin films made from the longest nanowires were 5 orders of magnitude larger than the shorter nanowires. The electrical conductivity data were modeled to a series and parallel-connected composite network. The films with the longest nanowires best fit a series-connected model, while the shorted nanowires best fit a parallel connected model. Specifically, the electrical conductivity of the thin films containing the longest Ag₂Te nanowires increased from 0.16 to 0.61 S/cm when the weight percent Ag₂Te increased from 45 to 85%. The magnitude of the Seebeck coefficient remained relatively unchanged (about −130 μV/K) as the amount of Ag₂Te in the films increased. A power factor of ∼1 μW/mK² was determined for the 85 wt. % Ag₂Te films at room temperature. These results reveal the important role of the nanowire length in the thermoelectric performance of composite thin films.

中文翻译：

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电子导电Ag2Te纳米线/聚合物热电薄膜

在这里，我们报道了聚（[N，N'-双（2-辛基十二烷基）-萘-1,4,5,8-双（二​​甲叉酰亚胺）-2），空气稳定的薄膜的电导率和塞贝克系数-1,6-二基] - ALT嵌有β -银（2,2'-联噻吩）） - -5,5' ₂Te纳米线。合成了三种不同长度的纳米线（〜2600，〜800和〜300 nm），并将其与聚合物结合以形成复合薄膜。由最长的纳米线制成的薄膜的室温电导率值比较短的纳米线大5个数量级。将电导率数据建模为串联和并联连接的复合网络。最长的纳米线的薄膜最适合串联模型，而短的纳米线的薄膜最适合并联模型。具体而言，当Ag ₂的重量百分比为₂时，包含最长的Ag ₂ Te纳米线的薄膜的电导率从0.16 S / cm增加到0.61 S / cm。Te从45增加到85％。塞贝克系数的大小保持相对不变（约-130  μ V / K）作为Ag的量₂碲膜中的增加。〜1的功率因数μ W / mK的²测定为85重量 在室温下的％Ag ₂ Te膜。这些结果揭示了纳米线长度在复合薄膜的热电性能中的重要作用。