The analysis of the affinity between the interfaces in organic photovoltaic devices is crucial for elucidating their operating mechanisms. N,N′-bis{3-[3-(dimethylamino)propylamino]propyl}perylene-3,4,9,10-tetracarboxylic diimide (PDINN), an aliphatic amine-functionalized perylene diimide, is predominantly employed as an electron-transport layer (ETL) that aids in the extraction of electrical charges from organic photodetectors. However, its usage is primarily limited to non-fullerene acceptor-based active layers. In this study, atomic force microscopy (AFM) imaging and whole and line profiles are utilized to precisely assess the affinity between PDINN and fullerene acceptors. The analysis of the photovoltaic and photodetector characteristics at different light intensities, voltages, and wavelengths reveals that the PDINN-free devices exhibit exceptional performance. Specifically, the PDINN-free devices display a high responsivity and a remarkable detectivity of ∼10 Jones under low-light conditions of 700 lux or below.

中文翻译：

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用于高效低光有机光敏电子器件的 N 型无缓冲接口

有机光伏器件中界面之间的亲和力分析对于阐明其工作机制至关重要。 N,N'-双{3-[3-(二甲基氨基)丙氨基]丙基}苝-3,4,9,10-四甲二酰亚胺 (PDINN) 是一种脂肪族胺官能化苝二酰亚胺，主要用作电子-传输层（ETL）有助于从有机光电探测器中提取电荷。然而，其用途主要限于基于非富勒烯受体的活性层。在这项研究中，利用原子力显微镜 (AFM) 成像以及整体和线轮廓来精确评估 PDINN 和富勒烯受体之间的亲和力。对不同光强、电压和波长下的光伏和光电探测器特性的分析表明，无 PDINN 的器件表现出卓越的性能。具体来说，无 PDINN 的器件在 700 勒克斯或以下的低光条件下表现出高响应度和 ∼10 Jones 的显着探测率。