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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 >Impact of Rapid Thermal Annealing on Thermoelectric Properties of Bulk Nanostructured Zinc Oxide
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Impact of Rapid Thermal Annealing on Thermoelectric Properties of Bulk Nanostructured Zinc Oxide

机译：快速热退火对块状纳米结构氧化锌热电性能的影响

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摘要

In search for non-toxic thermoelectric materials that are stable in air at elevated temperatures, zinc oxide has been shown to be one of only few efficient n-type oxidic materials. Our bottom-up approach starts with very small (＜10 nm) Al-doped ZnO nanoparticles prepared from organometallic precursors by chemical vapor synthesis using nominal doping concentrations of 2 at% and 8 at%. In order to obtain bulk nanostructured solids, the powders were compacted in a current-activated pressure-assisted densification process. Rapid thermal annealing was studied systematically as a means of further dopant activation. The thermoelectric properties are evaluated with regard to charge carrier concentration and mobility. A Jonker-type analysis reveals the potential of our approach to achieve high power factors. In the present study, power factors larger than 4×10~(-4) Wm~(-1)K~(-2) were measured at temperatures higher than 600 ℃.
机译：为了寻找在高温下在空气中稳定的无毒热电材料，氧化锌已被证明是仅有的几种有效的n型氧化材料之一。我们的自下而上的方法始于使用有机原子前体通过化学气相合成（使用2 at％和8 at％的标称掺杂浓度）由有机金属前驱物制备的很小（小于10 nm）的Al掺杂ZnO纳米颗粒。为了获得块状纳米结构固体，将粉末在电流激活的压力辅助致密化过程中压实。对快速热退火进行了系统研究，以作为进一步激活掺杂剂的手段。就载流子浓度和迁移率评估热电性质。琼克（Jonker）型分析揭示了我们实现高功率因数方法的潜力。在本研究中，在高于600℃的温度下测量了大于4×10〜（-4）Wm〜（-1）K〜（-2）的功率因数。

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  • 会议地点 San Francisco CA(US)
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    Markus Engenhorst; Devendraprakash Gautam; Carolin Schilling; Markus Winterer; Gabi Schierning; Roland 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;

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