Solar radiation, especially ultraviolet (UV) light, is a major hazard for most skin‐related cancers. The growing needs for wearable health monitoring systems call for a high‐performance real‐time UV sensor to prevent skin diseases caused by excess UV exposure. To this end, here a novel self‐powered p‐CuZnS/n‐TiO₂ UV photodetector (PD) with high performance is successfully developed (responsivity of 2.54 mA W⁻¹ at 0 V toward 300 nm). Moreover, by effectively replacing the Ti foil with a thin Ti wire for the anodization process, the conventional planar rigid device is artfully turned into a fiber‐shaped flexible and wearable one. The fiber‐shaped device shows an outstanding responsivity of 640 A W⁻¹, external quantum efficiency of 2.3 × 10⁵%, and photocurrent of ≈4 mA at 3 V, exceeding those of most current UV PDs. Its ultrahigh photocurrent enables it to be easily integrated with commercial electronics to function as a real‐time monitor system. Thus, the first real‐time wearable UV radiation sensor that reads out ambient UV power density and transmits data to smart phones via wifi is demonstrated. This work not only presents a promising wearable health monitor, but also provides a general strategy for designing and fabricating smart wearable electronic devices.

中文翻译：

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基于高性能p-CuZnS / n-TiO2光电探测器的实时可穿戴紫外线辐射监测仪

太阳辐射，尤其是紫外线（UV），是大多数与皮肤相关的癌症的主要危害。对可穿戴式健康监控系统的需求不断增长，因此需要高性能的实时紫外线传感器，以防止因过度暴露于紫外线而引起的皮肤疾病。为此，在此成功开发了一种新型的高性能自供电p-CuZnS / n-TiO ₂紫外光电探测器（PD）（在0 V至300 nm处的响应度为2.54 mA W ^-1）。此外，通过用细的钛丝有效地代替钛箔进行阳极氧化工艺，传统的平面刚性装置巧妙地变成了纤维状的柔性且可穿戴的装置。纤维状器件显示出出色的响应度640 AW ^-1，外部量子效率为2.3×10 ⁵％，并且在3 V时的光电流为≈4mA，超过目前大多数UV PD的光电流。其超高的光电流使其可以轻松地与商业电子设备集成，以充当实时监控系统。因此，展示了第一个实时可穿戴式紫外线辐射传感器，该传感器可读取环境紫外线功率密度，并通过wifi将数据传输到智能手机。这项工作不仅提出了有希望的可穿戴健康监视器，而且还提供了设计和制造智能可穿戴电子设备的一般策略。