Exploring smartphone-based environmental sensors through applying perovskite quantum dots
文献类型： 外文期刊
作者： Tian, Hongwu 1 ; Jiao, Leizi 1 ; Wang, Kun 2 ; Zhao, Xiande 1 ; Cao, Fengjing 1 ; Dong, Daming 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Natl Engn Res Ctr Intelligent Equipment Agr, Beijing 100097, Peoples R China
2.Chinese Acad Sci, Aerosp Informat Res Inst, Key Lab Digital Earth Sci, Beijing 100094, Peoples R China
关键词： Sensor; Perovskite quantum dots; Smartphone; UV radiation; COD
期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：16.744； 五年影响因子：14.61 ）
ISSN： 1385-8947
年卷期： 2022 年 448 卷
页码：
收录情况： SCI
摘要： Smartphone have been applied to develop various sensors. However, because of the limitations of the Si detectors used in smartphone cameras, they can only detect visible light, which greatly restricts their functions for advanced sensor development. Herein, we extended the detection range of smartphone cameras to ultraviolet (UV) region by using perovskite quantum dots (QDs), which have excellent down-converting properties. We realized two smartphone-based environmental sensors. (1) A solar UV radiation sensor in which the perovskite QDs convert UV light to visible light that is detected by the smartphone camera. Coupled with app, this ingenious sensor can detect the solar UV index and also visualize the UV-radiation distribution. (2) A water chemical oxygen demand sensor that based on UV absorption. The sensor was realized by adding a simple attachment to the front of the smartphone camera. It can be used as an in-pocket sensor to measure water quality anytime and anywhere.
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