Ultraviolet C (UVC) photodetectors have garnered considerable attention recently because the detection of UVC is critical for preventing skin damage in humans, monitoring environmental conditions, detecting power aging in facilities, and military applications. As UVC detectors are “solar-blind”, they encounter less interference than other environmental signals, resulting in low disturbance levels. This study employed a natural precursor (glucose) and a one-step ultrasonic reaction procedure to prepare carbon quantum dots (CQDs), which served as a convenient and environmentally friendly material to combine with polyethyleneimine (PEI). The prepared materials were used to develop a self-powered, high-performance UVC photodetector. The thickness of the constitutive film was investigated in detail based on the conditions of the electron transport pathway and trap positions to further improve the performance of the PEI/CQD photodetectors. Under the optimized conditions, the photodetector could generate a strong signal (1.5 mA W⁻¹ at 254 nm) and exhibit high detectability (1.8 × 10¹⁰ Jones at 254 nm), an ultrafast response, and long-term stability during the power supply sequence. The developed solar-blind UVC photodetector can be applied in various ways to monitor UVC in an affordable, straightforward, and precise manner.

中文翻译：

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使用聚乙烯亚胺/碳量子点进行简单处理的自供电光电探测器可实现高灵敏度 UVC 检测

紫外线 C (UVC) 光电探测器最近引起了相当大的关注，因为 UVC 的检测对于防止人类皮肤损伤、监测环境条件、检测设施中的电源老化和军事应用至关重要。由于 UVC 探测器是“日盲”的，因此它们比其他环境信号受到的干扰更少，从而导致干扰水平较低。这项研究采用天然前体（葡萄糖）和一步超声反应程序来制备碳量子点（CQD），它是一种与聚乙烯亚胺（PEI）结合的便捷且环保的材料。所制备的材料用于开发自供电的高性能 UVC 光电探测器。根据电子传输路径和陷阱位置的条件详细研究了本构膜的厚度，以进一步提高PEI/CQD光电探测器的性能。在优化条件下，光电探测器可以产生强信号（254 nm处为1.5 mA W ⁻¹），并表现出高可检测性（254 nm处为1.8 × 10 ¹⁰ Jones）、超快响应和供电期间的长期稳定性。顺序。开发的日盲 UVC 光电探测器可以以多种方式应用，以经济、简单和精确的方式监测 UVC。