Considering the basic concepts of P‐type and N‐type originated from inorganic semiconductors, it has been deduced in this report that the non‐doped polymer semiconductors should be ambipolar materials. Thus, the carrier dynamics of hole‐only and electron‐only devices of poly(N‐vinylcarbazole) (PVK) are researched through impedance spectroscopy. The results show that the hole and electron transports both possess high dispersion with parameter of 0.1–0.2 and 0.1, respectively. In addition, the hole and electron mobilities under different electric field are basically in the same order of magnitude, which shows that PVK is one intrinsically ambipolar polymer semiconductor although it is traditionally thought to “P‐type.” Finally, the abnormal negative slope phenomenon of transferring curve is analyzed, which is ascribed to the energy relaxation through vibration in polymer segment.

中文翻译：

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非掺杂“ P型”聚（N-乙烯基咔唑）的异常载流子动力学

考虑到源自无机半导体的P型和N型的基本概念，在本报告中推断出，非掺杂聚合物半导体应为双极性材料。因此，poly（N的纯空穴和纯电子器件的载流子动力学乙烯基咔唑（PVK）是通过阻抗谱研究的。结果表明，空穴和电子传输都具有高分散性，参数分别为0.1–0.2和0.1。此外，不同电场下的空穴和电子迁移率基本上处于相同的数量级，这表明PVK是一种固有的双极性聚合物半导体，尽管传统上认为它是“ P型”。最后，分析了传递曲线的异常负斜率现象，归因于聚合物段振动引起的能量弛豫。