理想能量选择接触热载流子太阳电池的光电互易性
Optoelectronic Reciprocity in Hot Carrier Solar Cells with Ideal Energy Selective Contacts
摘要：
热载流子太阳能电池的理论功率转换效率远远超过单结限制。然而，热载流子太阳能电池的实际应用远远落后于这些理论预测。传统单结太阳能电池的电致发光的互易关系已经非常成功地将其效率推向理论极限。在这项工作中，我们将讨论如何一个功能的热载流子器件的签名应体现在电致发光和黑暗的$I-V$特性实验。热载流子性质导致偏离传统单结太阳能电池典型的肖克利二极管方程。这些偏差与载流子温度的增加直接相关，因此与从电致发光光谱测量的温度直接相关。我们还阐明了如何在黑暗中的热载流子太阳能电池的行为取决于俄歇过程是否发挥了重要作用，揭示了可以忽略的俄歇复合（载流子守恒模型）和占主导地位的俄歇复合（影响电离模型）的制度之间的鲜明对比热载流子太阳能电池。
英文摘要：
Hot carrier solar cells promise theoretical power conversion efficiencies far beyond the single junction limit. However, practical implementations of hot carrier solar cells have lagged far behind those theoretical predictions. Reciprocity relations for electro-luminescence from conventional single junction solar cells have been extremely successful in driving their efficiency ever closer to the theoretical limits. In this work, we discuss how the signatures of a functioning hot carrier device should manifest experimentally in electro-luminescence and dark $I-V$ characteristics. Hot carrier properties lead to deviations from the Shockley diode equation that is typical for conventional single junction solar cells. These deviations are directly linked to an increase in temperature of the carriers and therefore the temperature measured from electro-luminescence spectra. We also elucidate how the behaviour of hot carrier solar cells in the dark depends on whether Auger processes play a significant role, revealing a stark contrast between the regime of negligible Auger recombination (carrier conservation model) and dominant Auger recombination (Impact Ionization model) for hot carrier solar cells.
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