Revealing the quantum regime of photovoltaics is crucial to enhancing the internal quantum efficiency of a double quantum dots (DQDs) photocell housed in a cavity. In this study, the performance of a quantum photovoltaic is evaluated based on the current–voltage and power-voltage characteristics in a cavity-coupled DQDs photocell. The results show that the cavity-DQDs coupling coefficient plays a dissipative role in the photovoltaic performance, and the cavity has a limited size for the photovoltaic performance. Additionally, more low-energy photons are easily absorbed by this cavity-coupled DQDs photocell compared with the case without cavity. These results may provide some strategies for improving the photoelectric conversion efficiency and internal quantum efficiency of cavity-coupled DQDs photocells.

揭示光伏的量子机制对于提高容纳在腔中的双量子点 (DQD) 光电池的内部量子效率至关重要。在这项研究中，基于腔耦合 DQD 光电池中的电流-电压和功率-电压特性来评估量子光伏的性能。结果表明，腔体-DQDs耦合系数对光伏性能起耗散作用，腔体对光伏性能的影响有限。此外，与没有空腔的情况相比，这种空腔耦合 DQD 光电池更容易吸收更多低能光子。这些结果可能为提高腔耦合DQDs光电池的光电转换效率和内量子效率提供一些策略。