基于非富勒烯受体的可见光-近红外有机光电探测器：Silvaco TCAD数值模拟

Visible−Near Infrared Organic PhotodetectorsBased on Non-Fullerene Acceptors

摘要:

高灵敏度的有机光电探测器(OPD)具有从可见光到近红外(NIR)的宽带响应和优异的整体器件性能,在包括高质量生物成像在内的各种应用中起到了非常重要的作用。本文使用SilvacoTCAD模拟了一种活性层由宽带隙聚合物PBDTTT-C-T作为给体以及稠合八烷基小分子FOIC作为受体构成的混合物所制成的宽带有机光电探测器。模拟结果表明,器件的暗电流密度、外量子效益(EQE)、可探测到的最低光强能力等各项指标达到了很好的水平,与实验数据吻合较好。由此,本文认为模拟过程中所使用到的参数具有较好的可信度和使用价值,可以为同类型光电探测器的模拟与研究提供有益借鉴。

Abstract:

Organic photodetector (OPD) with high sensitivity has broadband response from visible light to near infrared (NIR) and excellent overall device performance. It plays a very important role in various applications including high-quality biological imaging. In this paper, Silvaco TCAD is used to simulate a broadband organic photodetector made of a mixture of a broad band gap polymer PBDTTT-C-T as a donor and a newly developed fused octacylic small molecule FOIC as a receptor. The outcomes show that the dark current density of the device, the external quantum efficiency and the lowest detectable light intensity ability has reached high standard and been fit well with the experiment data. In view of this, this paper believes the parameters used in the simulation process have good reliability and value, which can provide useful reference for the simulation and research of the same type of photodetector.