利用超强光-物质耦合提高响应度的有机光电二极管
Organic Photodiodes with an Extended Responsivity using Ultrastrong Light-Matter Coupling
摘要：
在有机光电二极管（OPD）中，光被激子吸收，激子解离以产生光电流。在这里，我们展示了一种新型的OPD，其中光被极化激元吸收，混合光物质状态。我们展示了在可见光和红外波长的超强耦合制度的极化激元OPD的操作。这些设备可以被设计为显示具有非常弱的角度依赖性的窄响应度。更重要的是，它们可以被调谐以在裸激子吸收之外的光谱范围内操作。值得注意的是，我们表明，极化激元OPD的响应度可以被推到近红外波长，其中很少有有机吸收剂可用，外部量子效率超过控制OPD。
英文摘要：
In organic photodiodes (OPDs) light is absorbed by excitons, which dissociate to generate photocurrent. Here, we demonstrate a novel type of OPD in which light is absorbed by polaritons, hybrid light-matter states. We demonstrate polariton OPDs operating in the ultra-strong coupling regime at visible and infrared wavelengths. These devices can be engineered to show narrow responsivity with a very weak angle-dependence. More importantly, they can be tuned to operate in a spectral range outside that of the bare exciton absorption. Remarkably, we show that the responsivity of a polariton OPD can be pushed to near infrared wavelengths, where few organic absorbers are available, with external quantum efficiencies exceeding those of a control OPD.
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