论文标题
热载体太阳能电池的热力学性能：量子传输模型
Thermodynamic performance of hot-carrier solar cells: A quantum transport model
论文作者
论文摘要
在传统的太阳能电池中，光生载体在提取发电之前会失去部分能量。热载体太阳能电池的目的是在能量损失之前提取载体，从而将更多的能量转化为电力。这需要在非平衡（非热）能量分布中提取载体。在这里，我们研究了热载体太阳能电池在这种非平衡分布中的性能。我们提出了一个量子传输模型，其中每种能量损失过程（载体热化，松弛和重组）由Büttiker探针模拟。我们研究电荷和热传输，以分析热载体太阳能电池的功率输出和效率，从而引入了不同的损失过程和载体提取的部分效率。我们表明，通过非平衡分布产生电力有可能提高输出功率和效率。此外，在分布为热的极限下，我们证明了载载器提取的盒车形变速器可在任何给定的输出功率下最大化效率。
In conventional solar cells, photogenerated carriers lose part of their energy before they can be extracted to make electricity. The aim of hot-carrier solar cells is to extract the carriers before this energy loss, thereby turning more energy into electrical power. This requires extracting the carriers in a nonequilibrium (nonthermal) energy distribution. Here, we investigate the performance of hot-carrier solar cells for such nonequilibrium distributions. We propose a quantum transport model in which each energy-loss process (carrier thermalization, relaxation, and recombination) is simulated by a Büttiker probe. We study charge and heat transport to analyze the hot-carrier solar cell's power output and efficiency, introducing partial efficiencies for different loss processes and the carrier extraction. We show that producing electrical power from a nonequilibrium distribution has the potential to improve the output power and efficiency. Furthermore, in the limit where the distribution is thermal, we prove that a boxcar-shaped transmission for the carrier extraction maximizes the efficiency at any given output power.
