Efficiency Potential of Photovoltaic Materials and Devices Unveiled by Detailed-Balance Analysis
Efficiency Potential of Photovoltaic Materials and Devices Unveiled by Detailed-Balance Analysis
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DOI：
10.1103/physrevapplied.7.044016
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发表时间：
2017-04-19
影响因子：
4.6
通讯作者：
Kirchartz, Thomas
中科院分区：
文献类型：
--
作者：
Rau, Uwe;Blank, Beatrix;Kirchartz, Thomas
提出了一种一致的数学方法，将Shockley-Queisser（SQ）理论与实际设备的分析联系起来。我们证明了太阳能电池的外部光伏量子效率Q（e）（PV）是由SQ型带隙能量的分布以及如何从实验数据中推导出这种分布引起的。这导致我们的光伏带隙能量E-g（PV）的定义作为参考值的设备性能的分析。对于各种太阳能电池设备，我们表明Q（e）（PV）和电致发光测量的结合可以进行详细的损耗分析，该分析完全符合详细平衡的原则。
A consistent mathematical approach is presented that connects the Shockley-Queisser (SQ) theory to the analysis of real-world devices. We demonstrate that the external photovoltaic quantum efficiency Q(e)(PV) of a solar cell results from a distribution of SQ-type band-gap energies and how this distribution is derived from experimental data. This leads us to the definition of a photovoltaic band-gap energy E-g(PV) as a reference value for the analysis of the device performance. For a variety of solar-cell devices, we show that the combination of Q(e)(PV) and electroluminescence measurements allows for a detailed loss analysis that is fully compatible with the principle of detailed balance.