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Nanostructured p-n Junctions for Kinetic-to-Electrical Energy Conversion

机译：纳米结构的p-n结，用于动能到电能的转换

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摘要

Piezoelectric ZnO nanorods grown on a flexible substrate are combined with the p-type semiconducting polymer PEDOT:PSS to produce a p-n junction device that successfully demonstrates kinetic-to-electrical energy conversion. Both the voltage and current output of the devices are measured to be in the range of 10 mV and 10 μA cm−2. Combining these figures for the best device gives a maximum possible power density of 0.4 mW cm−3. Systematic testing of the devices is performed showing that the voltage output increases linearly with applied stress, and is reduced significantly by illumination with super-band gap light. This provides strong evidence that the voltage output results from piezoelectric effects in the ZnO. The behavior of the devices is explained by considering the time-dependent changes in band structure resulting from the straining of a piezoelectric material within a p-n junction. It is shown that the rate of screening of the depolarisation field determines the power output of a piezoelectric energy harvesting device. This model is consistent with the behavior of a number of previous devices utilising the piezoelectric effect in ZnO.
机译：将在柔性基板上生长的压电ZnO纳米棒与p型半导体聚合物PEDOT：PSS结合在一起，以生产成功地证明了动能到电能转换的p-n结器件。器件的电压和电流输出均在10 mV和10μAcm-2的范围内测量。将这些数字结合在一起得出最佳器件，则最大可能的功率密度为0.4 mW cm-3。对设备进行了系统测试，结果表明电压输出随施加的应力线性增加，而通过超禁带光照明则明显降低。这提供了有力的证据，表明电压输出是由ZnO中的压电效应产生的。通过考虑由于p-n结内压电材料的应变而导致的能带结构随时间的变化来解释器件的行为。结果表明，去极化场的屏蔽率决定了压电能量收集装置的功率输出。该模型与利用ZnO中的压电效应的许多先前器件的行为一致。

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  • 来源
    《Advanced energy materials》 |2012年第10期|1-8|共8页
  • 作者

    Joe Briscoe; Mark Stewart; Melvin Vopson; Markys Cain; Paul M. Weaver; Steve Dunn;

  • 作者单位

    Centre for Materials Research School of Engineering and Materials Science Queen Mary University of London E1 4NS;

    National Physical Laboratory Hampton Road Teddington TW11 0LW UK;

    National Physical Laboratory Hampton Road Teddington TW11 0LW UK;

    National Physical Laboratory Hampton Road Teddington TW11 0LW UK;

    National Physical Laboratory Hampton Road Teddington TW11 0LW UK;

    Centre for Materials Research School of Engineering and Materials Science Queen Mary University of London E1 4NS;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    energy harvesting; hybrid; p-n junctions; piezoelectrics; zinc oxide;

    机译：能量收集混合p-n结压电氧化锌;

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