Biomimetic Flexible High-Sensitivity Near-Infrared II Organic Photodetector for Photon Detection and Imaging,Advanced Optical Materials

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Biomimetic Flexible High-Sensitivity Near-Infrared II Organic Photodetector for Photon Detection and Imaging
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2023-08-22 , DOI: 10.1002/adom.202301518
Yingjun Xia ₁ , Chen Geng ₁ , Xingqi Bi ₁ , Mingpeng Li ₁ , Yu Zhu ₁ , Zhaoyang Yao ₁ , Xiangjian Wan ₁ , Guanghui Li ₁ , Yongsheng Chen _{1,

2}

Affiliation

The flexible near-infrared (NIR) organic photodetector is an essential prerequisite for the next-generation visual system for accurate information identification. However, prevailing limitations in NIR organic photodetectors, including high noise, weak responsivity, and low detectivity, directly impede the translation to practical applications. Herein, ultranarrow bandgap acceptors, featuring a 2D highly electron-donating central core (DTPC), named as YZ and YZ1, are designed and synthesized for NIR organic photodetectors. It is found that the introduction of highly rigid DTPC effectively reduces energetic disorder in active films. Moreover, extending the end conjugation not only broadens the absorption spectrum but also diminishes trap states and improves charge transport. Consequently, the YZ1-based organic photodetector exhibits an impressive detection range from 300 to 1050 nm with a high responsivity of 0.27 A W⁻¹ at 1000 nm and specific detectivity of 9.24 × 10¹³ Jones, comparable to commercial silicon photodiodes. Inspired by biological eyes, large-area parallelly independent photodetector arrays (2000 pixels) for an artificial vision system are fabricated, which enables a clear matter identification in the NIR region. These findings and results simultaneously provide critical insights into molecular design and bridge the gap between material science and device engineering, accelerating the application of NIR organic photodetectors in next-generation wearable optoelectronics.

中文翻译：

用于光子检测和成像的仿生柔性高灵敏度近红外 II 有机光电探测器

灵活的近红外（NIR）有机光电探测器是下一代视觉系统准确识别信息的重要先决条件。然而，近红外有机光电探测器普遍存在的局限性，包括高噪声、弱响应度和低探测率，直接阻碍了其向实际应用的转化。在此，设计并合成了用于近红外有机光电探测器的超窄带隙受体，其具有二维高电子供给中心核（DTPC），命名为YZ和YZ1。研究发现，高刚性DTPC的引入有效减少了活性薄膜的能量紊乱。此外，延长末端共轭不仅可以拓宽吸收光谱，还可以减少陷阱态并改善电荷传输。因此，基于YZ1的有机光电探测器表现出令人印象深刻的300至1050 nm的探测范围，在1000 nm处具有0.27 A W ^-1的高响应度和9.24 × 10 ¹³ Jones的比探测率，与商用硅光电二极管相当。受生物眼睛的启发，制造了用于人工视觉系统的大面积并行独立光电探测器阵列（2000像素），可以在近红外区域实现清晰的物质识别。这些发现和结果同时为分子设计提供了重要的见解，并弥合了材料科学和器件工程之间的差距，加速了近红外有机光电探测器在下一代可穿戴光电器件中的应用。

更新日期：2023-08-22

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