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A Paper-Based Wearable Photodetector for Simultaneous UV Intensity and Dosage Measurement

机译：用于同时UV强度和剂量测量的纸质可穿戴光电探测器

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摘要

Photodetectors, which convert the light signal into other forms of signal, have been under the spotlight of research for many years because they are widely applied in monitoring, communication, and imaging. Most of the currently available photodetectors can output electrical signals to indicate the transient light intensity, while some display color change to reveal the absorbed light dosage. However, there is no device that can tell the transient light intensity and accumulated light dosage at the same time. Here, a paper-based wearable photodetector that can simultaneously measure transient light intensity and accumulated light dosage is reported. The phosphomolybdic acid/citric acid system, whose color change can be observed by the naked eye, is designed as the photochromic material to combine with photodetective materials (using 2D Sr2Nb3O10 and ZnO nanoparticle as examples) on paper. Such paper-based photodetector fully utilizes natural hygroscopicity and softness of paper, showing decent flexibility. Its optoelectronic signal remains stable even after 1000 cycles of bending. To the best of one's knowledge, this is the first photodetector that can tell light intensity and dosage simultaneously. This work introduces a new type of wearable photodetector by structure design and material selection, shedding light on more novel works for convenient and practical photodetection.
机译：将光信号转换为其他形式的信号的光电探测器已经在研究的聚焦下，多年来是因为它们被广泛应用于监测，通信和成像。大多数当前可用的光电探测器可以输出电信号以指示瞬态光强度，而一些显示颜色变化以显示吸收的光剂量。然而，没有设备可以在同时讲述瞬态光强度和累积的光剂量。这里，报道了一种可同时测量瞬时光强度和累积光剂量的纸基可穿戴光电探测器。通过肉眼观察磷钼酸/柠檬酸系统，其颜色变化是设计为光致变色材料，以与纸上的光电蚀刻材料（使用2D SR2NB3O10和ZnO纳米粒子为例）。这种基于纸张的光电探测器充分利用了自然吸湿性和纸张柔软性，显示出体面的灵活性。即使在1000次弯曲后，它的光电信号也保持稳定。据一个人的知识，这是第一张能探测器，可以同时识别光强度和剂量。这项工作通过结构设计和材料选择引入了一种新型的可穿透光电探测器，脱落灯对更多的新颖作品，便于实用的光电探测。

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