Visible‐blind ultraviolet (VBUV) photodetectors are designed for UV detection without responding to visible light, thus having many applications in communications, flame detection, environment monitoring, and astronomy. Herein, an organic device concept based on the bulk heterojunction (BHJ) photodiode is presented for high‐performance VBUV photodetection and imaging. The BHJ, comprised of an organic electron donor, 2,7‐dioctyl[1]benzothieno[3,2‐b][1]benzothiophene (C8‐BTBT), and an electron acceptor, indene‐C60 bisadduct (ICBA), shows efficient generation and transport of free charges upon UV irradiation. The organic photodiode (OPD) delivers exceptional VBUV photodetection performance. At a low voltage of −0.5 V, the device exhibits a wide linear dynamic range of 98.15 dB. Furthermore, the OPD can detect ultra‐low light intensities down to 0.58 µW cm−2 with a high photoresponsivity of 0.12 A W−1 and specific detectivity of 2.75 × 1012 Jones. More importantly, by integrating the OPD with a readout integrated circuit, the pixel‐array organic VBUV imager is demonstrated to have high‐quality imaging capability. The results reveal a novel strategy to design VBUV photodetectors and imagers with balanced performance, cost, area, flexibility, and power consumption.

中文翻译：

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基于[1]苯并噻吩[3,2-b]苯并噻吩 (BTBT) 衍生物的有机可见盲紫外光电二极管和像素阵列成像仪


可见盲紫外（VBUV）光电探测器专为紫外检测而设计，不响应可见光，因此在通信、火焰检测、环境监测和天文学中有许多应用。本文提出了一种基于体异质结 (BHJ) 光电二极管的有机器件概念，用于高性能 VBUV 光电检测和成像。 BHJ 由有机电子给体 2,7-二辛基[1]苯并噻吩[3,2-b][1]苯并噻吩 (C8-BTBT) 和电子受体茚-C60 双加合物 (ICBA) 组成，显示在紫外线照射下有效产生和传输自由电荷。有机光电二极管 (OPD) 提供卓越的 VBUV 光电检测性能。在−0.5 V 的低电压下，该器件表现出 98.15 dB 的宽线性动态范围。此外，OPD 可以检测低至 0.58 µW cm−2 的超低光强度，具有 0.12 A W−1 的高光响应度和 2.75 × 1012 Jones 的比检测率。更重要的是，通过将OPD与读出集成电路集成，像素阵列有机VBUV成像器被证明具有高质量的成像能力。结果揭示了一种新颖的策略来设计具有平衡性能、成本、面积、灵活性和功耗的 VBUV 光电探测器和成像器。