Inverted, top-illuminated flexible organic photodetectors (OPDs) are demonstrated using solution-processed hole extraction layer (HEL) at room temperature and semitransparent electrodes. The simplified fabrication process OPD yields a low dark current density of 80.9 nA/cm² at −5 V and a high sensitivity, as confirmed by a record high photo-to-dark-current ratio in excess of 7 $\times$ 10³ in the cases of light illuminations at 525 nm. Furthermore, the top-illuminated OPD also exhibits a high responsivity and a detection gain of 0.35A/W and 2.15 $\times$ 10¹² Jones, respectively. This flexible OPD exhibits an outstanding mechanical flexibility following tests with 60 000 bends. It is envisaged that this research will have a meaningful contribution to the next-generation OPD applications.

中文翻译：

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顶部照明的柔性有机光电探测器集成了空穴提取层，在室温下用溶液处理的 NiOₓ 薄膜合成

在室温下使用溶液处理的空穴提取层 (HEL) 和半透明电极演示了倒置的顶部照明柔性有机光电探测器 (OPD)。简化的制造工艺 OPD在 -5 V 下产生了 80.9 nA/cm ²的低暗电流密度和高灵敏度，正如超过 7 的创纪录的高光暗电流比所证实的 $\times$ 10 ³在 525 nm 的光照情况下。此外，顶部照明的 OPD 还表现出高响应度和 0.35A/W 和 2.15 $\times$ 10 ¹²琼斯，分别。这种灵活的 OPD 在经过 60 000 次弯曲测试后表现出出色的机械灵活性。预计这项研究将对下一代 OPD 应用做出有意义的贡献。