非理想光学响应太阳电池的热力学极限
Thermodynamic Limits of Solar Cells with Non-ideal Optical Response
摘要：
Shockley-Queisser（S-Q）理论定义了太阳能电池的Jsc、Voc、FF和效率的热力学上限。经典计算假设在带边处突然开始吸收，对于带隙以上的所有能量完全吸收，并且不存在非辐射复合。这些假设对于任何实际的太阳能电池都是不满足的。在本文中，我们解释了如何在存在非理想光学效应的情况下重新定义S-Q极限，并为Jsc，Voc和FF的新极限提供了封闭形式的解析表达式。值得注意的是，这些新的限制可以达到非常高的程度，即使是明显不完美的材料。
英文摘要：
The Shockley-Queisser (S-Q) theory defines the thermodynamic upper limits for Jsc, Voc, FF, and efficiency of a solar cell. The classical calculation assumes an abrupt onset of absorption at the band-edge, perfect absorption for all energies above the bandgap, and absence of non-radiative recombination. These assumptions are never satisfied for any practical solar cell. In this paper, we explain how the S-Q limits are redefined in the presence of the non-ideal optical effects, and we provide closed-form analytical expressions for the new limits for Jsc, Voc, and FF. Remarkably, these new limits can be achieved to a very high degree, even with significantly imperfect materials.
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