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首页> 外文会议>Nanoscale thermoelectric materials: Thermal and electrical transport, and applications to solid-state cooling and power generation >A new thermoelectric concept using large area PN junctions
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A new thermoelectric concept using large area PN junctions

机译：使用大面积PN结的新热电概念

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摘要

A new thermoelectric concept using large area silicon PN junctions is experimentally demonstrated. In contrast to conventional thermoelectric generators where the n-type and p-type semiconductors are connected electrically in series and thermally in parallel, we demonstrate a large area PN junction made from densified silicon nanoparticles that combines thermally induced charge generation and separation in a space charge region with the conventional Seebeck effect by applying a temperature gradient parallel to the PN junction. In the proposed concept, the electrical contacts are made at the cold side eliminating the need for contacts at the hot side allowing temperature gradients greater than 100K to be applied. The investigated PN junction devices are produced by stacking n-type and p-type nanopowder prior to a densification process. The nanoparticulate nature of the densified PN junction lowers thermal conductivity and increases the intraband traps density which we propose is beneficial for transport across the PN junction thus enhancing the thermoelectric properties. A fundamental working principle of the proposed concept is suggested, along with characterization of power output and output voltages per temperature difference that are close to those one would expect from a conventional thermoelectric generator.
机译：实验证明了使用大面积硅PN结的新热电概念。与传统的热电发电机（其中n型和p型半导体串联且并联热电连接）相反，我们展示了由致密化的硅纳米颗粒制成的大面积PN结，该结结合了热感应电荷的产生和空间电荷的分离通过施加平行于PN结的温度梯度，可以使该区域具有传统的塞贝克效应。在提出的概念中，电触点在冷侧制成，从而无需在热侧进行接触，从而允许施加大于100K的温度梯度。被研究的PN结器件是通过在致密化工艺之前堆叠n型和p型纳米粉体来生产的。致密的PN结的纳米颗粒性质降低了热导率，并增加了带内陷阱的密度，我们提出这对于穿过PN结的传输是有益的，从而提高了热电性能。提出了所提出概念的基本工作原理，以及每温差的功率输出和输出电压的表征，其接近于传统热电发电机所期望的功率输出。

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  • 会议地点 San Francisco CA(US)
  • 作者

    R. Chavez; A. Becker; V. Kessler; M. Engenhorst; N. Petermann; H. Wiggers; G. Schierning; R.Schmechel;

  • 作者单位

    Faculty of Engineering and Center for NanoIntegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 47057 Duisburg, Germany;

    Faculty of Engineering and Center for NanoIntegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 47057 Duisburg, Germany;

    Faculty of Engineering and Center for NanoIntegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 47057 Duisburg, Germany;

    Faculty of Engineering and Center for NanoIntegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 47057 Duisburg, Germany;

    Faculty of Engineering and Center for NanoIntegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 47057 Duisburg, Germany;

    Faculty of Engineering and Center for NanoIntegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 47057 Duisburg, Germany;

    Faculty of Engineering and Center for NanoIntegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 47057 Duisburg, Germany;

    Faculty of Engineering and Center for NanoIntegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 47057 Duisburg, Germany;

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