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首页> 外文期刊>Physical review >Correlated electron dynamics in quantum-dot sensitized solar cell: Kadanoff-Baym versus Markovian approach
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Correlated electron dynamics in quantum-dot sensitized solar cell: Kadanoff-Baym versus Markovian approach

机译：量子点敏化太阳能电池中的相关电子动力学：Kadanoff-Baym与Markovian方法

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摘要

Electron dynamics in quantum-dot sensitized solar cells is studied in the nonequilibrium Green's function approach. To solve Kadanoff-Baym (KB) equations we propose a method based on two-time spectral expansion of nonequilibrium Green's functions. The method is very efficient for stationary photocurrent calculations. The calculated photocurrent is compared with the computations based on the Markovian master equations. It is shown that the Markovian approximation overestimates the photocurrent versus the numerical solutions of the exact KB equations. The discrepancy can reach as much as one order of magnitude and, therefore, the Markovian approximation can overestimate the solar cell efficiency by one order of magnitude.
机译：以非平衡格林函数方法研究了量子点敏化太阳能电池中的电子动力学。为了解决Kadanoff-Baym（KB）方程，我们提出了一种基于非平衡格林函数两次频谱扩展的方法。该方法对于静态光电流计算非常有效。将计算出的光电流与基于马尔可夫主方程的计算结果进行比较。结果表明，马尔可夫近似高估了光电流与精确KB方程的数值解。差异可以达到一个数量级，因此，马尔可夫近似可以将太阳能电池效率高估一个数量级。

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  • 来源
    《Physical review》 |2012年第24期|p.241309.1-241309.5|共5页
  • 作者

    Grigory Kolesov; Yuri Dahnovsky;

  • 作者单位

    Department of Physics and Astronomy/3905, 1000 East University Avenue, University of Wyoming, Laramie, Wyoming 82071, USA;

    Department of Physics and Astronomy/3905, 1000 East University Avenue, University of Wyoming, Laramie, Wyoming 82071, USA;

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  • 正文语种 eng
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  • 关键词

    electronic transport in nanoscale materials and structures;

    机译：纳米级材料和结构中的电子传输;

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