High-performance short-wave infrared (SWIR) photodetectors (PDs) possess great potential in health monitoring, remote control, telecommunication, and medical diagnostics. In comparison with inorganic PDs, organic PDs (OPDs) stand out as good candidates for next-generation photodetection devices because of their ease of processing, tunable optoelectronic properties, lightweight, easy portability, and low-manufacturing cost. Herein, we reported two conjugated polymers with ultranarrow band gaps (0.6 eV) for photoconductor-mode SWIR OPDs, which exhibited broad and excellent photoresponse across the visible and IR regions as long as 1450 nm. Specifically, one of the polymers possessing longer exciton lifetimes and favorable morphology and molecular orientation was further applied for flexible OPDs, demonstrating excellent performance with the responsivity (R) and external quantum efficiency as high as 0.96 A/W and 106% at 1122 nm, respectively, comparable to those of 2D nanomaterial-based IR PDs. In addition, an image sensor composed of 16 × 16 flexible OPDs was constructed, which can detect spatial light intensity distribution (1342 nm) clearly. This contribution shed light on designing excellent conjugated polymers for high-performance photoconductor-mode OPDs, which can be employed for SWIR light image sensors.

中文翻译：

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高性能聚合物光电探测器实现的灵活的短波红外图像传感器

高性能短波红外（SWIR）光电探测器（PD）在健康监测，远程控制，电信和医疗诊断中具有巨大的潜力。与无机PD相比，有机PD（OPD）由于易于处理，可调节的光电特性，轻巧，易于携带且制造成本低而成为下一代光电检测设备的理想选择。在本文中，我们报道了两种具有超窄带隙（0.6 eV）的共轭聚合物，用于光电导体模式SWIR OPD，它们在1450 nm可见光和IR区域均表现出宽广而优异的光响应。具体而言，将一种具有更长激子寿命，良好的形态和分子取向的聚合物进一步应用于柔性OPD，R）和1122 nm处的外部量子效率分别高达0.96 A / W和106％，与2D纳米材料基IR PD相当。另外，构建了由16×16柔性OPD组成的图像传感器，可以清晰地检测空间光强度分布（1342 nm）。这一贡献揭示了为高性能光电导体模式OPD设计出色的共轭聚合物的方法，该共轭聚合物可用于SWIR光学图像传感器。