论文标题
能量沿激子电线的阴暗面：现场能屏障有助于通过光学深色子空间进行有效的振动介导的传输
The dark side of energy transport along excitonic wires: On-site energy barriers facilitate efficient, vibrationally-mediated transport through optically dark subspaces
论文作者
论文摘要
我们提出了一种基于黑暗状态保护的新型，反直觉的方法，用于通过“电线”的“电线”显着提高激子的传输效率，该效率包括一系列具有内在能量梯度的分子位点。具体而言，通过沿着传输路径的定期间隔将“屏障”引入能量景观，我们发现由于系统中的亚凸起和超级降低特征性的明显分离，不受欢迎的辐射重组过程被抑制。反过来，这也可能导致许多数量级的传输能力提高，即使是很长的链条也是如此。从那里开始，我们将这种现象的鲁棒性分析到系统和环境特性的变化，以表明这种效应在各种不同的热环境和光学环境方程中可能是有益的。最后，我们表明，此处介绍的新型能量景观可能为克服短长度尺度提供了一个有用的基础，而短长尺度通常会在有机光伏特和其他纳米级传输方案中发生激子扩散，从而导致了这种设备效率的大量潜在提高。
We present a novel, counter-intuitive method, based on dark state protection, for significantly improving exciton transport efficiency through `wires' comprising a chain of molecular sites with an intrinsic energy gradient. Specifically, by introducing `barriers' to the energy landscape at regular intervals along the transport path, we find that undesirable radiative recombination processes are suppressed due to a clear separation of sub-radiant and super-radiant eigenstates in the system. This, in turn, can lead to an improvement in transmitted power by many orders of magnitude, even for very long chains. From there, we analyse the robustness of this phenomenon to changes in both system and environment properties to show that this effect can be beneficial over a range of different thermal and optical environment regimes. Finally, we show that the novel energy landscape presented here may provide a useful foundation for overcoming the short length scales over which exciton diffusion typically occurs in organic photo-voltaics and other nanoscale transport scenarios, thus leading to considerable potential improvements in the efficiency of such devices.
